信桂新,楊朝現(xiàn),楊慶媛,李承檜,魏朝富※
(1. 西南大學(xué)資源環(huán)境學(xué)院,重慶 400715;2. 西南大學(xué)地理科學(xué)學(xué)院,重慶 400715)
·土地整理工程·
用熵權(quán)法和改進(jìn)TOPSIS模型評價(jià)高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后效應(yīng)
信桂新1,楊朝現(xiàn)1,楊慶媛2,李承檜1,魏朝富1※
(1. 西南大學(xué)資源環(huán)境學(xué)院,重慶 400715;2. 西南大學(xué)地理科學(xué)學(xué)院,重慶 400715)
規(guī)范評價(jià)實(shí)施效果對科學(xué)開展高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)具有重要意義。該文以山地丘陵區(qū)3個農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)程梯度差異明顯的高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)示范縣——重慶市江津區(qū)(YQ-I)、銅梁區(qū)(YQ-II)、梁平縣(YQ-III)為樣區(qū),以土地整治項(xiàng)目為樣點(diǎn),選取新型經(jīng)營主體數(shù)量、土地流轉(zhuǎn)規(guī)模等10項(xiàng)指標(biāo),構(gòu)建了高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后經(jīng)濟(jì)-社會效應(yīng)評價(jià)指標(biāo)體系,并將熵權(quán)法和改進(jìn)TOPSIS(technique for order preference by similarity to ideal solution)模型應(yīng)用于評價(jià)。結(jié)果發(fā)現(xiàn),在影響經(jīng)濟(jì)-社會效應(yīng)的各項(xiàng)指標(biāo)中,適度規(guī)?;?jīng)營面積、項(xiàng)目后期管護(hù)農(nóng)民參與度、農(nóng)民參與項(xiàng)目施工收入等 3 項(xiàng)指標(biāo)處于重要級,指標(biāo)值變差大、影響強(qiáng);農(nóng)民人均農(nóng)業(yè)年收入變化、整治工程村民滿意度、項(xiàng)目后期管護(hù)措施到位度和農(nóng)民參與項(xiàng)目施工人數(shù)等4項(xiàng)處于邊緣級,指標(biāo)值變差小、影響弱;其余指標(biāo)處于次要級,影響程度居中。3個樣區(qū)高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后經(jīng)濟(jì)-社會綜合效應(yīng)與農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)程關(guān)系密切,呈現(xiàn)為農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)展快速型的YQ-I>進(jìn)展加速型的YQ-II>相對緩慢型的YQ-III,效應(yīng)等級分別為良、中、差;但單方面的經(jīng)濟(jì)效應(yīng)和社會效應(yīng)具有不平衡性,表現(xiàn)為指標(biāo)等級分布不平衡、效應(yīng)等級分布不平衡、研究樣區(qū)內(nèi)部不平衡;而隨著農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)程加快,經(jīng)濟(jì)效應(yīng)和社會效應(yīng)之間的差距在逐步縮小,表現(xiàn)為YQ-III、YQ-II和YQ-I中,經(jīng)濟(jì)效應(yīng)貼近度與社會效應(yīng)貼近度之間的差距依次為22.25、1.21和0.77倍。因此,通過農(nóng)業(yè)產(chǎn)業(yè)化,山地丘陵區(qū)能有效地利用和發(fā)揮高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的支撐作用,并通過新型經(jīng)營主體更好地統(tǒng)籌高標(biāo)準(zhǔn)基本農(nóng)田的建設(shè)與后續(xù)管護(hù);而基于熵權(quán)法和改進(jìn)TOPSIS模型的評價(jià)方法,能夠有效用于高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后經(jīng)濟(jì)-社會效應(yīng)評價(jià)。
土地利用;經(jīng)濟(jì);模型;高標(biāo)準(zhǔn)基本農(nóng)田;熵;效應(yīng);后評價(jià)
擺脫傳統(tǒng)的小農(nóng)分散土地經(jīng)營模式,加快轉(zhuǎn)變農(nóng)業(yè)發(fā)展方式,大力推進(jìn)農(nóng)業(yè)現(xiàn)代化,是實(shí)現(xiàn)中國農(nóng)業(yè)轉(zhuǎn)型發(fā)展的必由之路[1]。作為中國農(nóng)業(yè)轉(zhuǎn)型的有力支撐[2],高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)不僅是提高耕地綜合生產(chǎn)能力、改善農(nóng)業(yè)生產(chǎn)條件、保障國家糧食安全、發(fā)展現(xiàn)代農(nóng)業(yè)的宏觀戰(zhàn)略舉措,也是推動農(nóng)村經(jīng)濟(jì)發(fā)展、農(nóng)業(yè)產(chǎn)業(yè)培育以及農(nóng)村社會和諧和有序治理的基礎(chǔ)平臺和重要抓手[3]。通過高標(biāo)準(zhǔn)基本農(nóng)田建設(shè),能夠有效解決耕地分割細(xì)碎、水利設(shè)施短缺、耕地質(zhì)量低和農(nóng)田環(huán)境惡化等問題,實(shí)現(xiàn)田塊結(jié)構(gòu)與布局優(yōu)化、農(nóng)田水路基礎(chǔ)設(shè)施改善、耕地質(zhì)量與地力提升、農(nóng)業(yè)機(jī)械化推廣和農(nóng)田生態(tài)防護(hù)體系構(gòu)建,增強(qiáng)農(nóng)業(yè)抗災(zāi)能力,提高糧食綜合產(chǎn)能,推進(jìn)以轉(zhuǎn)變農(nóng)業(yè)發(fā)展方式為主線的中國特色農(nóng)業(yè)現(xiàn)代化,助推農(nóng)民收入持續(xù)增長與宜居家園建設(shè)[4]。
目前,圍繞如何進(jìn)行高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)開展了許多研究。在建設(shè)策略上,相關(guān)研究認(rèn)為,高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的核心在于做到“四化”——布局合理化、農(nóng)田規(guī)?;?、生產(chǎn)機(jī)械化、環(huán)境生態(tài)化[5-6],建設(shè)田塊平整、渠網(wǎng)配套、道路通暢的高產(chǎn)穩(wěn)產(chǎn)基本農(nóng)田[7];在建設(shè)區(qū)域上,已有的研究從土壤質(zhì)量、立地條件、基礎(chǔ)設(shè)施、空間形態(tài)、生態(tài)安全、自然災(zāi)害風(fēng)險(xiǎn)等方面來評判高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的適宜區(qū)域[8-12];在整治技術(shù)上,一些學(xué)者提出應(yīng)針對承包地細(xì)碎、不適合農(nóng)業(yè)現(xiàn)代化發(fā)展需求的事實(shí),著力推進(jìn)土地平整工程、配套農(nóng)田基礎(chǔ)設(shè)施,做好土地權(quán)屬調(diào)整,為土地流轉(zhuǎn)和農(nóng)業(yè)適度規(guī)模經(jīng)營創(chuàng)造條件[13-15];在保障措施上,有關(guān)研究認(rèn)為,確保高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的關(guān)鍵是改進(jìn)涉農(nóng)資金投入機(jī)制,并與土地承包經(jīng)營權(quán)流轉(zhuǎn)相結(jié)合,構(gòu)建集中投入的高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)體系[3],創(chuàng)新產(chǎn)權(quán)調(diào)整或耕地流轉(zhuǎn)機(jī)制、土地整治機(jī)制、公眾參與機(jī)制、農(nóng)田設(shè)施維護(hù)機(jī)制等[16-17],特別在山地區(qū)應(yīng)注重創(chuàng)造性地開展高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)[18]。與之對照,在高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)評價(jià)方面直觀的研究報(bào)道顯得較少,但相關(guān)的土地整治績效評價(jià)研究卻十分豐富?;仡欀袊恋卣卧u價(jià)研究進(jìn)展,早期的績效評價(jià)注重整治結(jié)果[19-22],并從以經(jīng)濟(jì)效益評價(jià)為主轉(zhuǎn)向經(jīng)濟(jì)、社會和生態(tài)效益并重[23-25];伴隨土地整治實(shí)踐的深入,基于行為與結(jié)果的辯證關(guān)系,績效評價(jià)引入過程思維,呈現(xiàn)將整治行為和整治結(jié)果相結(jié)合開展評價(jià)研究的新趨勢[19-20,22,26]。但從研究現(xiàn)狀來看,圍繞經(jīng)濟(jì)、社會和生態(tài)3個維度開展土地整治單一或綜合效益評價(jià)仍是主流[27],其重點(diǎn)趨向基于不同的研究區(qū)或項(xiàng)目類型進(jìn)一步完善評價(jià)的維度和指標(biāo)體系,改進(jìn)評價(jià)方法,如模糊綜合評價(jià)法[28-30]、能值分析法[31-32]、可拓物元模型[33-35]、生態(tài)服務(wù)價(jià)值估算模型[36]等方法近年來得到廣泛應(yīng)用,并逐漸開始關(guān)注項(xiàng)目后評價(jià)問題[29,31,37-38],以便將土地整治實(shí)施的直接效果與其后續(xù)效應(yīng)連接起來,形成對整治效果的連續(xù)性認(rèn)識和監(jiān)控。
但是,總體而言,針對高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)實(shí)施后的實(shí)際效果和影響研究仍然存在不足,尤其缺乏深入細(xì)致的分析和論證,以致于在高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的投資決策和項(xiàng)目管理中,一些共性問題反復(fù)出現(xiàn),嚴(yán)重影響了高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的效果[39-41]?;诖?,本文借助“十二五”高標(biāo)準(zhǔn)農(nóng)田建設(shè)綜合成效評估工作,選取重慶市 3 個高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)示范縣為研究樣區(qū),以農(nóng)業(yè)產(chǎn)業(yè)化為視角,通過構(gòu)建指標(biāo)體系和評估模型探討了高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的經(jīng)濟(jì)-社會效應(yīng),以期為豐富高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的理論與實(shí)踐提供借鑒,為山地丘陵區(qū)在精準(zhǔn)扶貧和農(nóng)業(yè)轉(zhuǎn)型發(fā)展中科學(xué)實(shí)施高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)提供指導(dǎo)。
1.1 評價(jià)指標(biāo)體系構(gòu)建及權(quán)重確定
1.1.1 評價(jià)指標(biāo)選擇
近年來項(xiàng)目后評價(jià)在土地整治理論研究和實(shí)踐探索中愈益受到重視[42-43]。綜合來看,基于經(jīng)濟(jì)、社會、生態(tài)3效益的綜合評價(jià),以及基于社會影響、生態(tài)環(huán)境影響、可持續(xù)性等的專項(xiàng)評價(jià)是各類報(bào)道關(guān)注的重點(diǎn)。高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)雖隸屬于土地整治研究和實(shí)踐范疇,但相對于一般的土地整治項(xiàng)目類型,高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)問題更為復(fù)雜,具有投資大、技術(shù)性強(qiáng)、涉及面廣、見效慢的顯著特征[3,40],并與糧食安全、農(nóng)業(yè)現(xiàn)代化、農(nóng)村發(fā)展等國家或區(qū)域戰(zhàn)略問題密切關(guān)聯(lián)。因此,在高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)成效的評價(jià)體系中,雖然需要兼顧經(jīng)濟(jì)、社會、生態(tài)不同的方面,但三者的地位并非對等。根本而言,高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的核心是在兼顧生態(tài)的基礎(chǔ)上獲取最大化的經(jīng)濟(jì)和社會效益[44-45]。由此來看,評價(jià)高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的后效應(yīng),應(yīng)優(yōu)先著重于其經(jīng)濟(jì)效應(yīng)和社會效應(yīng)。據(jù)此,本文即從經(jīng)濟(jì)、社會2個方面構(gòu)建評價(jià)指標(biāo)體系。并參考相關(guān)研究[44,46-48]和“十二五”高標(biāo)準(zhǔn)農(nóng)田建設(shè)綜合成效評估指標(biāo),遵循代表性、可比性、可操作性、可量化性原則,結(jié)合研究區(qū)實(shí)際,各選取5個指標(biāo)表征高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后經(jīng)濟(jì)、社會效應(yīng)。其中,經(jīng)濟(jì)效應(yīng)指標(biāo)是依據(jù)國土資源部《高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)規(guī)范(試行)》和農(nóng)業(yè)部《高標(biāo)準(zhǔn)農(nóng)田建設(shè)標(biāo)準(zhǔn)》(NY/T 2148-2012)中對集中連片種植、規(guī)?;?jīng)營、規(guī)模效益提升等的要求,結(jié)合高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)對村域經(jīng)濟(jì)和農(nóng)業(yè)產(chǎn)業(yè)發(fā)展的輻射帶動影響,面向村域尺度選取新型經(jīng)營主體數(shù)量、土地流轉(zhuǎn)規(guī)模、適度規(guī)?;?jīng)營面積、農(nóng)民人均農(nóng)業(yè)年收入、畝均產(chǎn)出等5個指標(biāo),并通過實(shí)施前后的變化值表征;社會效應(yīng)指標(biāo)是依據(jù)土地整治項(xiàng)目實(shí)施管理辦法中對農(nóng)戶主體地位、公眾參與、后續(xù)管護(hù)等的要求,結(jié)合高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)對項(xiàng)目區(qū)農(nóng)戶生活和社會治理的影響,面向項(xiàng)目尺度選取項(xiàng)目區(qū)農(nóng)民參與施工人數(shù)、農(nóng)民參與施工收入、整治工程村民滿意度、項(xiàng)目后期農(nóng)民參與度、項(xiàng)目后期管護(hù)措施到位度等5個指標(biāo),并通過項(xiàng)目區(qū)調(diào)查數(shù)據(jù)予以表征。具體指標(biāo)及其含義見表1。
表1 高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后經(jīng)濟(jì)-社會效應(yīng)評價(jià)指標(biāo)體系Table 1 Post-evaluation index system of well-facilitied farmland construction
1.1.2 指標(biāo)權(quán)重確定
采用熵權(quán)法確定。熵權(quán)法是一種由待評價(jià)指標(biāo)來確定指標(biāo)權(quán)重的一種客觀評價(jià)法,具有較強(qiáng)的操作性,能夠有效反映數(shù)據(jù)隱含的信息,增強(qiáng)指標(biāo)的差異性和分辨性,以避免選取指標(biāo)的差異過小而造成的分析不清,從而達(dá)到全面反映各類信息的目的[49]。熵權(quán)法的評價(jià)思路是評價(jià)對象在某項(xiàng)指標(biāo)的值相差越大,該對象越重要,權(quán)重值較大。根據(jù)指標(biāo)的變異程度,能夠客觀計(jì)算出各指標(biāo)的權(quán)重值,為多個指標(biāo)的綜合評價(jià)提供更為可靠的依據(jù)。具體計(jì)算步驟為:
第一步,對判斷矩陣進(jìn)行標(biāo)準(zhǔn)化處理,得到標(biāo)準(zhǔn)矩陣P:
第二步,計(jì)算第j個指標(biāo)的信息熵值ej:
式中ej(0≤ej≤1)為第j項(xiàng)指標(biāo)的熵值;-1/lnm為信息熵系數(shù)。
第三步,計(jì)算第j個指標(biāo)的熵權(quán)uj:
1.2 評價(jià)模型構(gòu)建
TOPSIS(technique for order preference by similarity to ideal solution)模型,由Hwang和Yoon在1981年提出,是系統(tǒng)工程中有限方案多目標(biāo)決策分析的一種決策技術(shù),為距離綜合評價(jià)法[50]。近年來,該模型被用于風(fēng)險(xiǎn)決策分析、環(huán)境質(zhì)量測評、土地生態(tài)安全評價(jià)和土地整理實(shí)施效益評價(jià)等多個方面[51-55],取得了較好的成果。該模型的優(yōu)點(diǎn)在于能夠充分利用原始數(shù)據(jù)、計(jì)算過程數(shù)據(jù)丟失量較小、幾何意義直觀且不受參考序列選擇的干擾?!罢硐虢狻焙汀柏?fù)理想解”是TOPSIS模型中的2個重要概念,即通過尋求各個指標(biāo)中的最優(yōu)解和最劣解,構(gòu)建評價(jià)指標(biāo)與最優(yōu)解和最劣解之間距離的二維數(shù)據(jù)空間,在此基礎(chǔ)上對各評價(jià)指標(biāo)與最優(yōu)解和最劣解作比較,如果在最接近最優(yōu)解的同時又最遠(yuǎn)離最劣解,則該方案為待評價(jià)方案中的最優(yōu)方案,反之,如果在最接近最劣解的同時又最遠(yuǎn)離最優(yōu)解,則該方案為待評價(jià)方案中的最差方案。
本文將改進(jìn)的TOPSIS模型與熵權(quán)法相結(jié)合,用于評價(jià)高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后的經(jīng)濟(jì)-社會效應(yīng)。與傳統(tǒng)的TOPSIS模型相比,改進(jìn)的TOPSIS模型主要是對待評價(jià)對象與最優(yōu)解和最劣解的評價(jià)值公式進(jìn)行了改進(jìn)[56-57]。具體實(shí)施步驟如下:
1)數(shù)據(jù)標(biāo)準(zhǔn)化處理。通常運(yùn)用極值標(biāo)準(zhǔn)化法來對評價(jià)指標(biāo)進(jìn)行處理,用以確定具體指標(biāo)實(shí)際值在該指標(biāo)權(quán)重中所處的狀況,這步可以直接利用熵權(quán)法中確定的標(biāo)準(zhǔn)化矩陣Pij。
2)確定指標(biāo)權(quán)重,建立加權(quán)決策矩陣。將前面介紹的熵權(quán)法的權(quán)重向量 uj考慮到?jīng)Q策矩陣中,通過矩陣 R的每一行與其權(quán)重 uj相乘得到加權(quán)后規(guī)范化決策矩陣為V=(vij)m×n:
3)尋求正理想解和負(fù)理想解。令V+表示最優(yōu)方案(正理想解),V-表示最劣方案(負(fù)理想解),則有:
4)距離計(jì)算。分別計(jì)算不同樣區(qū)評價(jià)向量到正理想解的距離D+和負(fù)理想解的距離D-:
5)計(jì)算不同用途與最優(yōu)方案的貼近度Cj:
式中Cj越大,表示第j項(xiàng)高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后經(jīng)濟(jì)-社會越接近于最優(yōu)水平。貼近度Cj的取值范圍為0到1,其中,當(dāng)Cj=1時,高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后的經(jīng)濟(jì)-社會效應(yīng)最好,Cj=0時,高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后的經(jīng)濟(jì)-社會效應(yīng)最差。根據(jù)國內(nèi)目前的研究結(jié)果[57-58],將 Cj劃分為 4個等級,用以定性表征高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后的各項(xiàng)效應(yīng)(表2)。
表2 高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)經(jīng)濟(jì)-社會效應(yīng)評價(jià)標(biāo)準(zhǔn)Table 2 Evaluation criterion of economy and society effect of well-facilitied farmland construction
2.1 研究樣區(qū)與評價(jià)單元
為推動“十二五”期間建成2 666.67萬hm2高標(biāo)準(zhǔn)基本農(nóng)田的任務(wù),2012年國土資源部召開加快推進(jìn)高標(biāo)準(zhǔn)基本農(nóng)田示范縣建設(shè)工作動員部署視頻會議,要求加快建設(shè)500個高標(biāo)準(zhǔn)基本農(nóng)田示范縣。擬通過開展500個示范縣建設(shè),著力提高耕地質(zhì)量,改善農(nóng)業(yè)生產(chǎn)條件,建設(shè)一大批集中連片、設(shè)施配套、高產(chǎn)穩(wěn)產(chǎn)、生態(tài)良好、抗災(zāi)能力強(qiáng)、與現(xiàn)代農(nóng)業(yè)生產(chǎn)和經(jīng)營方式相適應(yīng)的優(yōu)質(zhì)良田,為發(fā)展現(xiàn)代農(nóng)業(yè)提供重要支撐。同時,還將大幅度增加農(nóng)民收入,有效拉動農(nóng)村消費(fèi)和投資需求,促進(jìn)縣域經(jīng)濟(jì)發(fā)展?;诖?,結(jié)合山地丘陵區(qū)的地形地貌和農(nóng)業(yè)用地特征,本文以3個農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)程梯度差異明顯的高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)示范縣——重慶市江津區(qū)(YQ-I)、銅梁區(qū)(YQ-II)、梁平縣(YQ-III)為樣區(qū)(圖1,表3),并以此為評價(jià)單元開展高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)成效調(diào)查。調(diào)查樣點(diǎn)為重慶市農(nóng)村土地整治中心在“十二五”高標(biāo)準(zhǔn)農(nóng)田建設(shè)綜合成效評估工作中篩選出的典型項(xiàng)目,范圍涉及 3 個樣區(qū)的 4 8個鎮(zhèn)街、101個土地整治項(xiàng)目。
圖1 研究樣區(qū)圖Fig.1 Map of study sample area
表3 研究樣區(qū)概況Table 3 General situation of study sample area
研究樣區(qū)農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)程測度。高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)示范縣的重要目標(biāo)任務(wù)之一就是成為“發(fā)揮土地整治綜合效益、促進(jìn)現(xiàn)代農(nóng)業(yè)發(fā)展的典型”[59]。在參照農(nóng)業(yè)現(xiàn)代化指標(biāo)體系、農(nóng)業(yè)產(chǎn)業(yè)化經(jīng)營指標(biāo)體系研究的相關(guān)成果基礎(chǔ)上[60-62],遵循代表性、可比性、可操作性和簡單性原則,基于山地丘陵區(qū)的農(nóng)業(yè)產(chǎn)業(yè)化特征[63-64],選取耕地流轉(zhuǎn)規(guī)模、農(nóng)產(chǎn)品商品率、農(nóng)業(yè)綜合機(jī)械化水平3項(xiàng)指標(biāo),分別采取專家咨詢法確定指標(biāo)權(quán)重、均值法進(jìn)行數(shù)據(jù)標(biāo)準(zhǔn)化處理和指標(biāo)綜合評價(jià)法計(jì)算評價(jià)結(jié)果,最終完成研究樣區(qū)的農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)程測度(表4)。依據(jù)評價(jià)結(jié)果,研究樣區(qū)的農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)程可劃分為3種類型,即將耕地流轉(zhuǎn)規(guī)模在4萬hm2以上、農(nóng)產(chǎn)品商品率70%以上、農(nóng)業(yè)綜合機(jī)械化水平50%以上、綜合評價(jià)分值35分以上的確定為農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)展快速型,以YQ-I為代表區(qū)域;將耕地流轉(zhuǎn)規(guī)模在3萬hm2以上、農(nóng)產(chǎn)品商品率70%以上、農(nóng)業(yè)綜合機(jī)械化水平40%以上、綜合評價(jià)分值在30~35分之間的確定為農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)展加速型,以YQ-II為代表區(qū)域;將耕地流轉(zhuǎn)規(guī)模在2萬hm2以上、農(nóng)產(chǎn)品商品率60%以上、農(nóng)業(yè)綜合機(jī)械化水平40%以上、綜合評價(jià)分值低于30分的確定為農(nóng)業(yè)產(chǎn)業(yè)化相對緩慢型,以YQ-III為代表區(qū)域。
2.2 數(shù)據(jù)獲取
調(diào)查對象包括區(qū)縣農(nóng)村土地整治中心和項(xiàng)目涉及村的村干部,并在村支書、村主任和村會計(jì)間隨機(jī)抽取1人。通過走訪3個區(qū)縣農(nóng)村土地整治中心,收集到101個土地整治項(xiàng)目規(guī)劃設(shè)計(jì)文本和圖件以及竣工驗(yàn)收資料,并接洽了項(xiàng)目區(qū)調(diào)查事項(xiàng)。村干部調(diào)查主要圍繞兩個方面,一是了解總?cè)丝凇⒊W∪丝凇趧恿?、外出?wù)工勞動力、農(nóng)民人均純收入、土地面積、主要農(nóng)業(yè)產(chǎn)業(yè)等農(nóng)村基本信息;二是詢問記錄農(nóng)民參與項(xiàng)目施工情況、農(nóng)民對項(xiàng)目竣工后的工程滿意度、項(xiàng)目后期管護(hù)情況、土地流轉(zhuǎn)與規(guī)模經(jīng)營情況、土地流轉(zhuǎn)前后農(nóng)民收入和土地產(chǎn)出情況以及農(nóng)田生態(tài)環(huán)境建設(shè)情況等與高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)相關(guān)的信息。調(diào)查工作于2015年12月初開始,2016年1月初完成。在入村調(diào)查中,首先將高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)項(xiàng)目的名稱和時點(diǎn)告知村干部,以助其回顧項(xiàng)目建設(shè)帶來的變化,確保提供的信息與項(xiàng)目建設(shè)切實(shí)相關(guān);另外,隨機(jī)抽取1/3的村邀請村干部、農(nóng)戶和經(jīng)營大戶舉行小型座談會,請村民對已實(shí)施的高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)項(xiàng)目提出意見和建議,并填寫整治工程滿意度調(diào)查問卷,調(diào)查要求參與農(nóng)戶和經(jīng)營大戶的合計(jì)數(shù)量不低于項(xiàng)目區(qū)覆蓋農(nóng)戶總數(shù)的5%,會議時間控制在1.5 h內(nèi)。
調(diào)查共發(fā)放村委會調(diào)查問卷101份,回收問卷101份,其中YQ-I 23份,YQ-II 39份,YQ-III 39份,問卷有效率100%。舉行村干部、農(nóng)戶和經(jīng)營大戶小型座談會35場次,涉及876人,形成訪談記錄35份和整治工程滿意度調(diào)查問卷865份(問卷有效率98.74%)。
2.3 評價(jià)數(shù)據(jù)處理與檢驗(yàn)
評價(jià)指標(biāo)采用的源數(shù)據(jù)是按研究樣區(qū)分村統(tǒng)計(jì)后再經(jīng)過均值化處理得到的數(shù)據(jù)。因此,檢驗(yàn)評價(jià)指標(biāo)數(shù)據(jù)(均值)對調(diào)查數(shù)據(jù)的代表性,關(guān)系著評價(jià)結(jié)果是否客觀科學(xué)。在此,采用標(biāo)準(zhǔn)差系數(shù)(coefficient of variation,CV)檢驗(yàn)調(diào)查數(shù)據(jù)指標(biāo)數(shù)列的離散程度及均值的代表性。CV小于10%為弱變異性,CV在10%~100%間為中等變異性,CV大于100%為強(qiáng)變異性。一般意義上認(rèn)為,當(dāng)CV處于中等變異性范圍內(nèi)時,平均數(shù)的代表性便可接受。相關(guān)公式如下:
式中CV為標(biāo)準(zhǔn)差系數(shù),σ為調(diào)查指標(biāo)數(shù)列標(biāo)準(zhǔn)差,μ為調(diào)查指標(biāo)數(shù)列平均數(shù)。
式中N為數(shù)列中數(shù)據(jù)個數(shù),xi為數(shù)列中的第i個數(shù)值(i=1,2,3,…)。
檢驗(yàn)發(fā)現(xiàn),研究樣區(qū)30個指標(biāo)值均處于中等變異性范圍內(nèi)(表5),表明評價(jià)指標(biāo)數(shù)據(jù)對調(diào)查數(shù)據(jù)具有代表性,據(jù)此實(shí)施評價(jià)可行。
表4 研究樣區(qū)農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)程測度Table 4 Agriculture industrialization process estimating of study sample area
表5 評價(jià)數(shù)據(jù)標(biāo)準(zhǔn)差系數(shù)(CV)檢驗(yàn)Table 5 Evaluation data testing based on coefficient of variation
3.1 經(jīng)濟(jì)效應(yīng)分析
基于熵權(quán)法的權(quán)重確定思路,經(jīng)濟(jì)效應(yīng)指標(biāo)賦權(quán)結(jié)果顯示,C3(0.398 4)>C2(0.270 6)>C1(0.179 8)>C5(0.133 7)>C4(0.017 5),表明對高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的經(jīng)濟(jì)效應(yīng)而言,其對適度規(guī)?;?jīng)營的影響最為重要,其次是其直接或間接引起的土地流轉(zhuǎn)規(guī)模和新型經(jīng)營主體數(shù)量,最后是對畝均產(chǎn)出變化和農(nóng)民人均農(nóng)業(yè)年收入的影響。依據(jù)自然斷點(diǎn)法,可按權(quán)重≥0.3為重要級指標(biāo)、[0.1,0.3)為次要級指標(biāo)、<0.1為邊緣級指標(biāo)進(jìn)行指標(biāo)分級,那么在高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的經(jīng)濟(jì)效應(yīng)指標(biāo)中,適度規(guī)?;?jīng)營面積(C3)為重要級指標(biāo),土地流轉(zhuǎn)規(guī)模(C2)、新型經(jīng)營主體個數(shù)(C1)和畝均產(chǎn)出變化(C5)為次要級指標(biāo),農(nóng)民人均農(nóng)業(yè)年收入變化(C4)為邊緣級指標(biāo)。
對經(jīng)濟(jì)效應(yīng)的相關(guān)指標(biāo)統(tǒng)計(jì)分析顯示,農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)展快速型的YQ-I平均每個村的新型經(jīng)營主體個數(shù)(C1)為17.78個,土地流轉(zhuǎn)規(guī)模(C2)為102.41 hm2,適度規(guī)?;?jīng)營面積(C3)為72.09 hm2,農(nóng)民人均農(nóng)業(yè)年收入變化(C4)為295.65元,畝均產(chǎn)出變化(C5)為315.43元;進(jìn)展加速型的YQ-II平均每個村的新型經(jīng)營主體個數(shù)(C1)為11.77個,土地流轉(zhuǎn)規(guī)模(C2)為68.57 hm2,適度規(guī)?;?jīng)營面積(C3)為50.10 hm2,農(nóng)民人均農(nóng)業(yè)年收入變化(C4)為345.64元,畝均產(chǎn)出變化(C5)為300.64元;相對緩慢型的YQ-III平均每個村的新型經(jīng)營主體個數(shù)(C1)為10.56個,土地流轉(zhuǎn)規(guī)模(C2)為51.30 hm2,適度規(guī)模化經(jīng)營面積(C3)為29.83 hm2,農(nóng)民人均農(nóng)業(yè)年收入變化(C4)為345.64元,畝均產(chǎn)出變化(C5)為196.92元。
比較來看,在重要級指標(biāo)上,適度規(guī)?;?jīng)營面積(C3)表現(xiàn)為YQ-I>YQ-II>YQ-III,YQ-I分別高出YQ-II和YQ-III 43.91%、141.68%。在次要級指標(biāo)上,土地流轉(zhuǎn)規(guī)模(C2)表現(xiàn)為YQ-I>YQ-II>YQ-III,YQ-I分別高出YQ-II和YQ-III 49.35%、99.63%;新型經(jīng)營主體個數(shù)(C1)表現(xiàn)為YQ-I>YQ-II>YQ-III,YQ-I分別高出YQ-II和YQ-III 51.09%、68.33%;畝均產(chǎn)出變化(C5)表現(xiàn)為YQ-I>YQ-II>YQ-III,YQ-I分別高出YQ-II和YQ-III 4.92%、60.18%。在邊緣級指標(biāo)上,農(nóng)民人均農(nóng)業(yè)年收入變化(C4)表現(xiàn)為YQ-II(YQ-III)>YQ-I,YQ-II(YQ-III)高出YQ-I 16.91%。
基于改進(jìn)TOPSIS模型評價(jià)結(jié)果顯示,在高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后經(jīng)濟(jì)效應(yīng)方面,農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)展快速型的YQ-I距離負(fù)理想解的距離最遠(yuǎn),達(dá)到0.353 8,與最優(yōu)理想?yún)⒄拯c(diǎn)的貼近度為0.972 5,效應(yīng)等級為優(yōu),效果最好;其次是進(jìn)展加速型的YQ-II,距正理想解0.210 5,與最優(yōu)理想?yún)⒄拯c(diǎn)的貼近度為0.4305,效應(yīng)等級為中;相對緩慢型的YQ-III距離正理想解的距離最遠(yuǎn),達(dá)到0.353 8,與最優(yōu)理想?yún)⒄拯c(diǎn)的貼近度僅為0.027 5,效應(yīng)等級為差,效果相對最差(表6)。這與經(jīng)濟(jì)效應(yīng)指標(biāo)統(tǒng)計(jì)分析的結(jié)果具有一致性。
表6 高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)經(jīng)濟(jì)-社會效應(yīng)評價(jià)結(jié)果Table 6 Evaluation results of economy and society effect of well-facilitied farmland construction
3.2 社會效應(yīng)分析
基于熵權(quán)法的權(quán)重確定思路,社會效應(yīng)指標(biāo)賦權(quán)結(jié)果顯示,C9(0.400 6)>C6(0.399 9)>C8(0.099 5)>C10(0.091 9)>C7(0.008 1),表明對高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的社會效應(yīng)而言,最為重要的是看項(xiàng)目后期農(nóng)民參與管護(hù)的程度,其次看其對農(nóng)民參與項(xiàng)目施工收入的影響,再次則是看村民對整治工程的滿意度和項(xiàng)目后期管護(hù)措施的到位度,最后是農(nóng)民參與項(xiàng)目施工人數(shù)。同樣,依據(jù)自然斷點(diǎn)法進(jìn)行的指標(biāo)分級,在高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的社會效應(yīng)指標(biāo)中,項(xiàng)目后期管護(hù)農(nóng)民參與度(C9)、農(nóng)民參與項(xiàng)目施工收入(C6)為重要級指標(biāo),整治工程村民滿意度(C8)、項(xiàng)目后期管護(hù)措施到位度(C10)和農(nóng)民參與項(xiàng)目施工人數(shù)(C7)為邊緣級指標(biāo),無次要級指標(biāo)。
對社會效應(yīng)的相關(guān)指標(biāo)統(tǒng)計(jì)分析顯示,農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)展快速型的YQ-I平均每個村的農(nóng)民參與項(xiàng)目施工收入(C6)為223 008.70元,農(nóng)民參與項(xiàng)目施工人數(shù)(C7)為76.48人,整治工程村民滿意度(C8)為86.79%,項(xiàng)目后期管護(hù)農(nóng)民參與度(C9)為1.83%,項(xiàng)目后期管護(hù)措施到位度(C10)為29.77%;進(jìn)展加速型的YQ-II平均每個村的農(nóng)民參與項(xiàng)目施工收入(C6)為149 364.10元,農(nóng)民參與項(xiàng)目施工人數(shù)(C7)為78.08人,整治工程村民滿意度(C8)為91.24%,項(xiàng)目后期管護(hù)農(nóng)民參與度(C9)為1.77%,項(xiàng)目后期管護(hù)措施到位度(C10)為32.21%;相對緩慢型的YQ-III平均每個村的農(nóng)民參與項(xiàng)目施工收入(C6)為187 274.92元,農(nóng)民參與項(xiàng)目施工人數(shù)(C7)為80.87人,整治工程村民滿意度(C8)為75.19%,項(xiàng)目后期管護(hù)農(nóng)民參與度(C9)為2.51%,項(xiàng)目后期管護(hù)措施到位度(C10)為26.63%。
比較來看,在重要級指標(biāo)上,項(xiàng)目后期管護(hù)農(nóng)民參與度(C9)表現(xiàn)為YQ-III>YQ-I>YQ-II,YQ-III分別高出YQ-I和YQ-II 37.26%、41.67%;農(nóng)民參與項(xiàng)目施工收入(C6)表現(xiàn)為YQ-I>YQ-III>YQ-II,YQ-I分別高出YQ-III和YQ-II 19.08%、49.31%。在邊緣級指標(biāo)上,整治工程村民滿意度(C8)表現(xiàn)為YQ-II>YQ-I>YQ-III,YQ-II分別高出YQ-I和YQ-III 5.14%、21.35%;項(xiàng)目后期管護(hù)措施到位度(C10)表現(xiàn)為YQ-II>YQ-I>YQ-III,YQ-II分別高出YQ-I和YQ-III 8.21%、20.98%;農(nóng)民參與項(xiàng)目施工人數(shù)(C7)表現(xiàn)為YQ-III>YQ-II>YQ-I,YQ-III分別高出YQ-II和YQ-I 3.58%、5.74%。
基于改進(jìn)TOPSIS模型評價(jià)結(jié)果顯示,在高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后社會效應(yīng)方面,農(nóng)業(yè)產(chǎn)業(yè)化相對緩慢型的YQ-III距離負(fù)理想解的距離最遠(yuǎn),達(dá)到0.131 9,與最優(yōu)理想?yún)⒄拯c(diǎn)的貼近度為0.639 4,效應(yīng)等級為良,效果最好;其次是進(jìn)展快速型的YQ-I,距正理想解0.106 7,與最優(yōu)理想?yún)⒄拯c(diǎn)的貼近度為0.550 1,效應(yīng)等級為中;進(jìn)展加速型的YQ-II距離正理想解的距離最遠(yuǎn),達(dá)到0.171 2,與最優(yōu)理想?yún)⒄拯c(diǎn)的貼近度僅為0.194 9,效應(yīng)等級為差,效果相對最差(表6)。這與重要級指標(biāo)統(tǒng)計(jì)分析的結(jié)果具有一致性。
3.3 綜合效應(yīng)分析
基于熵權(quán)法的評價(jià)思路和指標(biāo)賦權(quán)結(jié)果分析,高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的經(jīng)濟(jì)效應(yīng)指標(biāo)明顯重于社會效應(yīng)指標(biāo)。經(jīng)濟(jì)效應(yīng)指標(biāo)中,包括1個重要級指標(biāo)、3個次要級指標(biāo)和 1 個邊緣級指標(biāo);而社會效應(yīng)指標(biāo)中,則包括 2個重要級指標(biāo)和 3 個邊緣級指標(biāo),次要級指標(biāo)缺失。由此可以推斷,農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)程快、程度高的樣區(qū),其高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的經(jīng)濟(jì)效應(yīng)在綜合效應(yīng)中正向貢獻(xiàn)大;而在農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)程緩慢的樣區(qū),經(jīng)濟(jì)效應(yīng)偏低,在綜合效應(yīng)中反倒成為約束。
基于改進(jìn)TOPSIS模型評價(jià)結(jié)果顯示,在高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后綜合效應(yīng)方面,農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)展快速型的YQ-I距離負(fù)理想解的距離最遠(yuǎn),達(dá)到0.377 1,與最優(yōu)理想?yún)⒄拯c(diǎn)的貼近度為0.778 7,效應(yīng)等級為良,效果最好;其次是進(jìn)展加速型的YQ-II,其距正理想解的距離和負(fù)理想解的距離界于YQ-I和YQ-III兩個樣區(qū)之間,與最優(yōu)理想?yún)⒄拯c(diǎn)的貼近度為0.377 4,效應(yīng)等級為中;相對緩慢型的YQ-III距離正理想解的距離最遠(yuǎn),達(dá)到0.361 5,與最優(yōu)理想?yún)⒄拯c(diǎn)的貼近度僅為0.267 9,效應(yīng)等級為差,效果相對最差(表6)。
在綜合效應(yīng)下,研究樣區(qū)內(nèi)部的經(jīng)濟(jì)效應(yīng)和社會效應(yīng)具有不平衡性。農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)展快速型的YQ-I經(jīng)濟(jì)效應(yīng)等級為優(yōu),而其社會效應(yīng)等級卻為中,且經(jīng)濟(jì)效應(yīng)高出社會效應(yīng)0.77倍;進(jìn)展加速型的YQ-II經(jīng)濟(jì)效應(yīng)等級為中,而其社會效應(yīng)等級卻為差,且經(jīng)濟(jì)效應(yīng)高出社會效應(yīng)1.21倍;與之相反,相對緩慢型的YQ-III則是社會效應(yīng)等級為良,而經(jīng)濟(jì)效應(yīng)等級為差,且社會效應(yīng)高出經(jīng)濟(jì)效應(yīng)22.25倍。從經(jīng)濟(jì)效應(yīng)與社會效應(yīng)差異變化的遞進(jìn)趨勢看,隨著農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)程加快,高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的經(jīng)濟(jì)效應(yīng)和社會效應(yīng)的差距將逐步縮小。
基于前述分析,并對照研究樣區(qū)的訪談記錄,不難發(fā)現(xiàn),高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的綜合效應(yīng)主要源于農(nóng)業(yè)產(chǎn)業(yè)化發(fā)展環(huán)境。農(nóng)業(yè)產(chǎn)業(yè)化發(fā)展進(jìn)程越快、程度越高,高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的綜合效應(yīng)越好。反之亦然。從樣區(qū)來看,隨著耕地流轉(zhuǎn)規(guī)模不斷擴(kuò)大和農(nóng)產(chǎn)品市場日益活躍,農(nóng)業(yè)對更高生產(chǎn)效率的需求愈益迫切,加之農(nóng)村勞動力老齡化、婦女化的刺激,農(nóng)業(yè)產(chǎn)業(yè)化、規(guī)?;C(jī)械化對農(nóng)業(yè)生產(chǎn)條件和基礎(chǔ)設(shè)施的要求越來越高。YQ-I的農(nóng)業(yè)產(chǎn)業(yè)化環(huán)境最為優(yōu)越,素有種植蔬菜、花卉苗木、特色水果的傳統(tǒng)優(yōu)勢和富硒農(nóng)產(chǎn)品的資源優(yōu)勢。為不重復(fù)低效農(nóng)業(yè)的老路,YQ-I將高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)作為中間環(huán)節(jié)和農(nóng)民增收工程,與前期土地流轉(zhuǎn)及后續(xù)農(nóng)業(yè)產(chǎn)業(yè)化規(guī)?;M(jìn)行有效銜接和整合,依據(jù)不同農(nóng)業(yè)產(chǎn)業(yè)類型和適度規(guī)?;蟾脑旄魈飰K、配套農(nóng)業(yè)基礎(chǔ)設(shè)施,結(jié)果其適度規(guī)模化經(jīng)營面積(C3)、土地流轉(zhuǎn)規(guī)模(C2)、新型經(jīng)營主體個數(shù)(C1)、畝均產(chǎn)出變化(C5)、農(nóng)民參與項(xiàng)目施工收入(C6)等重要級和次要級指標(biāo)的效果最好,評價(jià)效應(yīng)最佳,并由此受到經(jīng)營大戶的認(rèn)可和農(nóng)戶的支持擁護(hù)。而YQ-III有廣闊的槽、壩區(qū)域,素有種植水稻、玉米、油菜等糧油作物的傳統(tǒng)優(yōu)勢,由于地勢相對平坦,便于農(nóng)業(yè)機(jī)械化作業(yè),農(nóng)戶多采取“候鳥式”的耕作模式,導(dǎo)致耕地流轉(zhuǎn)規(guī)模相對較小,農(nóng)產(chǎn)品市場發(fā)育程度不高,農(nóng)業(yè)產(chǎn)業(yè)化環(huán)境總體不及YQ-I、YQ-II。因此,YQ-III高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)更注重基于家庭承包經(jīng)營模式改善生產(chǎn)條件、配套基礎(chǔ)設(shè)施,缺乏與土地流轉(zhuǎn)和適度規(guī)模經(jīng)營銜接、整合的有效機(jī)制,以至于其適度規(guī)?;?jīng)營面積(C3)、土地流轉(zhuǎn)規(guī)模(C2)、新型經(jīng)營主體個數(shù)(C1)、畝均產(chǎn)出變化(C5)等重要級和次要級指標(biāo)的效果欠佳,評價(jià)效應(yīng)相對較差。但是,農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)程快、程度高并不意味著高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的經(jīng)濟(jì)、社會效應(yīng)會自然達(dá)到平衡。YQ-II的農(nóng)業(yè)產(chǎn)業(yè)化環(huán)境總體相對較好,并在個別項(xiàng)目的實(shí)踐中形成了當(dāng)?shù)厝罕妳⑴c高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的成功經(jīng)驗(yàn)和做法,但由于面上尚未形成有效的推廣應(yīng)用機(jī)制(如農(nóng)民參與施工的工價(jià)標(biāo)準(zhǔn)問題、項(xiàng)目后期管護(hù)責(zé)任問題等),其項(xiàng)目后期管護(hù)農(nóng)民參與度(C9)、農(nóng)民參與項(xiàng)目施工收入(C6)等重要級指標(biāo)效果仍然欠佳,社會效應(yīng)有待更全面的提升。
1)基于熵權(quán)法和改進(jìn)TOPSIS模型的評價(jià)方法,能夠有效地用于高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后經(jīng)濟(jì)-社會效應(yīng)評價(jià)。近年來,雖然項(xiàng)目后評價(jià)在土地整治理論研究和實(shí)踐探索中愈益受到重視,但專門針對高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后評價(jià)問題的研究卻不多[65]。目前現(xiàn)有文獻(xiàn)主要以高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)個案項(xiàng)目為評價(jià)對象,以實(shí)施前后經(jīng)濟(jì)、社會、生態(tài)及綜合效益的對比分析為主要研究內(nèi)容,以德爾菲法(Delphi method)和層次分析法(analytic hierarchy process)為主進(jìn)行指標(biāo)賦權(quán),以綜合指數(shù)法或物元可拓模型、模糊綜合評價(jià)法計(jì)算評價(jià)結(jié)果[66-70]。鑒于此,本研究比較了高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)相對于一般土地整治活動的特殊性,突出了經(jīng)濟(jì)-社會效應(yīng),并選取10個因子構(gòu)建了評價(jià)指標(biāo)體系;同時,為規(guī)避指標(biāo)賦權(quán)過程中人為主觀因素的干擾、強(qiáng)化評價(jià)的客觀性,選取了熵權(quán)法和改進(jìn)TOPSIS模型進(jìn)行評價(jià);最后,選取3個農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)程梯度差異明顯的高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)示范縣為研究樣區(qū)展開調(diào)查,并對評價(jià)數(shù)據(jù)進(jìn)行了均值化處理和變異系數(shù)檢驗(yàn)。這不僅豐富了高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)效益定量研究方法,也將評價(jià)單元由大比例尺的項(xiàng)目區(qū)推廣到小比例尺的行政區(qū)。
2)山地丘陵區(qū)農(nóng)業(yè)產(chǎn)業(yè)化能促進(jìn)高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)。隨著耕地流轉(zhuǎn)規(guī)模不斷擴(kuò)大和農(nóng)產(chǎn)品市場日益活躍,農(nóng)業(yè)對更高生產(chǎn)效率的需求愈益迫切,加之農(nóng)村勞動力老齡化、婦女化刺激,相對節(jié)約勞動的農(nóng)業(yè)產(chǎn)業(yè)化、規(guī)模化、機(jī)械化對農(nóng)業(yè)生產(chǎn)條件和基礎(chǔ)設(shè)施的要求越來越高。因此,對高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)而言,除了遵循一般性建設(shè)目標(biāo)、建設(shè)內(nèi)容及工程技術(shù)要求,還應(yīng)該具體針對區(qū)域農(nóng)業(yè)發(fā)展的實(shí)際需求作出有力支撐。但問題在于,山地丘陵區(qū)應(yīng)該如何發(fā)揮高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的支撐作用??傮w而言,山地丘陵區(qū)既有地理?xiàng)l件差、人均耕地少、農(nóng)業(yè)基礎(chǔ)設(shè)施建設(shè)滯后的劣勢,又有立地條件多樣、立體氣候明顯、生物品種多樣的優(yōu)勢。將劣勢的資源稟賦轉(zhuǎn)化為優(yōu)勢條件、將獨(dú)特的農(nóng)業(yè)資源轉(zhuǎn)化為產(chǎn)業(yè)優(yōu)勢,實(shí)現(xiàn)各種生產(chǎn)要素的優(yōu)化組合,不僅需要通過農(nóng)業(yè)生產(chǎn)經(jīng)營方式的變革提供“軟件”支撐,也需要通過生產(chǎn)條件的改善提供“硬件”支撐。由此來看,與農(nóng)業(yè)生產(chǎn)經(jīng)營方式變革對應(yīng)的農(nóng)業(yè)產(chǎn)業(yè)化和與生產(chǎn)條件改善對應(yīng)的高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)應(yīng)當(dāng)是相互統(tǒng)一的。本研究中,3個研究樣區(qū)均是全國高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)示范縣,但不同區(qū)域高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的經(jīng)濟(jì)-社會效應(yīng)卻呈現(xiàn)明顯差異。進(jìn)一步分析發(fā)現(xiàn),農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)展快速型的YQ-I做法是,依托已有的農(nóng)業(yè)資源和產(chǎn)業(yè)優(yōu)勢,將高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)與土地流轉(zhuǎn)、農(nóng)業(yè)產(chǎn)業(yè)化規(guī)?;袡C(jī)結(jié)合,依據(jù)不同農(nóng)業(yè)產(chǎn)業(yè)類型和適度規(guī)?;蟾脑旄魈飰K、配套農(nóng)業(yè)基礎(chǔ)設(shè)施,從而明確了高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)要改善什么樣的農(nóng)業(yè)生產(chǎn)條件、配套什么樣的農(nóng)業(yè)基礎(chǔ)設(shè)施,產(chǎn)生出良好的經(jīng)濟(jì)-社會效應(yīng)。與之對照,農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)展相對緩慢型的YQ-III,雖然地勢相對平坦,田塊集中連片度較高,農(nóng)業(yè)機(jī)械化水平甚至高于YQ-I,但尚未形成有效的銜接機(jī)制,高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)仍然主要基于農(nóng)戶分散的承包地塊實(shí)施,導(dǎo)致土地流轉(zhuǎn)、適度規(guī)模經(jīng)營與高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)之間相互游離,即使高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)改善了小農(nóng)戶的耕作條件和生產(chǎn)環(huán)境,卻難以形成對農(nóng)業(yè)產(chǎn)業(yè)化的有效支撐,由此產(chǎn)生的經(jīng)濟(jì)效應(yīng)也就十分有限。由YQ-I和YQ-III的差異可進(jìn)一步推斷,在山地丘陵區(qū)農(nóng)業(yè)現(xiàn)代化進(jìn)程中,高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的支撐點(diǎn)在于,在農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)程中,圍繞項(xiàng)目區(qū)農(nóng)業(yè)產(chǎn)業(yè)培育和適度規(guī)模經(jīng)營需求,有針對性地實(shí)施高標(biāo)準(zhǔn)田塊改造和農(nóng)業(yè)基礎(chǔ)設(shè)施建設(shè),而這可能也是山地丘陵區(qū)精準(zhǔn)扶貧和農(nóng)業(yè)轉(zhuǎn)型的關(guān)鍵所在。
3)新型農(nóng)業(yè)經(jīng)營主體能有效地實(shí)施高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后續(xù)管護(hù)。后續(xù)管護(hù)關(guān)系著建成的高標(biāo)準(zhǔn)基本農(nóng)田長久效益的發(fā)揮。在相關(guān)論述中,一般認(rèn)為農(nóng)民是公眾參與和后續(xù)管護(hù)的主體,因此與農(nóng)民參與相關(guān)的指標(biāo)應(yīng)該是相對穩(wěn)定的。但從本研究來看,項(xiàng)目后期管護(hù)農(nóng)民參與度(C9)和農(nóng)民參與項(xiàng)目施工收入(C6)屬于重要級指標(biāo),在社會效應(yīng)中居于主導(dǎo)地位,且指標(biāo)值變差大,在3個研究樣區(qū)有顯著差異;社會效應(yīng)最好的是農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)程相對緩慢型的YQ-III,其次分別是農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)程快速型的YQ-I和進(jìn)展加速型的YQ-II。分析發(fā)現(xiàn),YQ-III的高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)主要基于農(nóng)戶分散的承包地塊實(shí)施,與農(nóng)民的利益相關(guān)度更為緊密,因此農(nóng)民在項(xiàng)目建設(shè)前、建設(shè)中和建設(shè)后的參與度較高,在后續(xù)的管護(hù)中積極性也更強(qiáng);而YQ-I、YQ-II的高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)主要面向土地流轉(zhuǎn)后實(shí)施,相應(yīng)的農(nóng)戶更關(guān)注的是務(wù)工或其他收益所得,至于項(xiàng)目建設(shè)和管護(hù)情況如何與其已不具有直接關(guān)系,因此其參與性和積極性便明顯下降。問題在于,即使YQ-III在農(nóng)民參與和后續(xù)管護(hù)中具有良好的社會效應(yīng),但對比YQ-I、YQ-II,其經(jīng)濟(jì)效應(yīng)卻相對較差,一旦出現(xiàn)比較效益更高的選擇(如土地流轉(zhuǎn)),從理性經(jīng)濟(jì)人的角度來說,農(nóng)民在參與項(xiàng)目建設(shè)和后續(xù)管護(hù)中的積極性將難以保障。由此可見,雖然農(nóng)民居于主體地位,但其行為決策上的不確定性導(dǎo)致其主體地位并未得到充分發(fā)揮和體現(xiàn)。而從 3 個研究樣區(qū)經(jīng)濟(jì)效應(yīng)與社會效應(yīng)差異變化隨農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)程加快而逐步縮小的趨勢來看,保障高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后續(xù)管護(hù)的可持續(xù)性,有必要結(jié)合家庭承包經(jīng)營向適度規(guī)模經(jīng)營轉(zhuǎn)變的趨勢,在后續(xù)管護(hù)中確立新型經(jīng)營主體的主導(dǎo)性和主體性地位,以便更有效地統(tǒng)籌項(xiàng)目的建設(shè)與管護(hù)。
1)通過指標(biāo)權(quán)重排序和重要性分級,在影響高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后經(jīng)濟(jì)-社會效應(yīng)的各項(xiàng)指標(biāo)中,適度規(guī)?;?jīng)營面積(C3)、項(xiàng)目后期管護(hù)農(nóng)民參與度(C9)、農(nóng)民參與項(xiàng)目施工收入(C6)為重要級指標(biāo),指標(biāo)值變差大,對評價(jià)結(jié)果影響強(qiáng);農(nóng)民人均農(nóng)業(yè)年收入變化(C4)、整治工程村民滿意度(C8)、項(xiàng)目后期管護(hù)措施到位度(C10)和農(nóng)民參與項(xiàng)目施工人數(shù)(C7)為邊緣級指標(biāo),指標(biāo)值變差小,對評價(jià)結(jié)果影響弱??傮w而言,經(jīng)濟(jì)效應(yīng)的指標(biāo)變差大于社會效應(yīng)的指標(biāo)變差。
2)將熵權(quán)法和改進(jìn)TOPSIS(technique for order preference by similarity to ideal solution)模型應(yīng)用于高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后經(jīng)濟(jì)-社會效應(yīng)評價(jià),3個研究樣區(qū)呈現(xiàn)為農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)展快速型的YQ-I>進(jìn)展加速型的YQ-II>相對緩慢型的YQ-III,效應(yīng)等級分別為良、中、差,表明農(nóng)業(yè)產(chǎn)業(yè)化發(fā)展進(jìn)程越快、程度越高的區(qū)域,高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的綜合效應(yīng)趨好;反之亦然。但高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后單方面的經(jīng)濟(jì)效應(yīng)和社會效應(yīng)具有不平衡性,表現(xiàn)為指標(biāo)等級分布不平衡、效應(yīng)等級分布不平衡和樣區(qū)內(nèi)部不平衡。不過,隨著農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)程加快,高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后的經(jīng)濟(jì)效應(yīng)和社會效應(yīng)差距在逐步縮小,表現(xiàn)為YQ-III、YQ-II和YQ-I中,經(jīng)濟(jì)效應(yīng)貼近度與社會效應(yīng)貼近度之間的差距依次為22.25、1.21和0.77倍。
結(jié)合 3 個研究樣區(qū)高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的效果,對山地丘陵區(qū)而言,發(fā)揮好高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)的支撐作用,除了遵循一般性建設(shè)目標(biāo)、建設(shè)內(nèi)容及工程技術(shù)要求,還應(yīng)與農(nóng)業(yè)產(chǎn)業(yè)化的需求相對應(yīng)。其中,值得借鑒的經(jīng)驗(yàn)教訓(xùn)是,YQ-I依托已有的農(nóng)業(yè)資源和產(chǎn)業(yè)優(yōu)勢,將高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)與土地流轉(zhuǎn)、農(nóng)業(yè)產(chǎn)業(yè)化規(guī)?;袡C(jī)結(jié)合,依據(jù)不同農(nóng)業(yè)產(chǎn)業(yè)類型和適度規(guī)?;蟾脑旄魈飰K、配套農(nóng)業(yè)基礎(chǔ)設(shè)施,從而明確高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)要改善什么樣的農(nóng)業(yè)生產(chǎn)條件、配套什么樣的農(nóng)業(yè)基礎(chǔ)設(shè)施,以實(shí)現(xiàn)高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)與當(dāng)?shù)剞r(nóng)業(yè)產(chǎn)業(yè)化的良性互動;YQ-II需更好地發(fā)揮好新型經(jīng)營主體的作用,將實(shí)踐中形成的管護(hù)經(jīng)驗(yàn)和成功做法向面上推廣;YQ-III應(yīng)將高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)與農(nóng)業(yè)產(chǎn)業(yè)化進(jìn)程中的產(chǎn)業(yè)結(jié)構(gòu)調(diào)整、土地流轉(zhuǎn)、適度規(guī)模經(jīng)營及新型經(jīng)營主體培育相銜接。
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Post-evaluation of well-facilitied capital farmland construction based on entropy weight method and improved TOPSIS model
Xin Guixin1,Yang Chaoxian1,Yang Qingyuan2,Li Chenghui1,Wei Chaofu1※
(1. School of Resources and Environment,Southwest University,Chongqing 400715,China;2. School of Geographical Sciences,Southwest University,Chongqing 400715,China)
In the context of a large-scale well-facilitied capital farmland construction,scientifically evaluating its effect and influence of post-implementation will be of great significance. We chose Jiangjin District(YQ-I),Tongliang District(YQ-II),and Liangping County(YQ-III),three demonstration counties of well-facilitied capital farmland construction from Chongqing Municipality as study areas,which were characterized by obvious gradient difference of agricultural industrialization.We also chose typical land consolidation projects as survey samples from each county. Taking economy and society effect as the core,and by the aid of entropy weight method and improved TOPSIS model,we built the post-evaluation index system and evaluated economy and society effect of three sample areas. In the evaluating index system,number of the new operators(C1),scale of land circulation(C2),area of scale management(C3),changes of peasants’ annual farm income per person(C4),and changes of per area output(C5) were used as indicators of economy effect. Income of peasants’ participation in the project(C6),number of peasants’ participation in the project(C7),degree of peasants’ satisfaction for the project implementation(C8),degree of peasants’ participation late in the project(C9),and degree of nursing measures’ implementation late in the project(C10) were used as indicators of society effect. The results showed that the index weight order of economy effect was C3(0.3984)>C2(0.2706)>C1(0.1798)>C5(0.1337)>C4(0.0175),and the index weight order of society effect was C9(0.4006)>C6(0.3999)>C8(0.0995)>C10(0.0919)>C7(0.0081). Through the classification of index weight importance,C3,C9,and C6were classified as importance with the large variation and strong impact;C4,C8,C10,and C7were classified as edge with the small variation and weak impact;the rest,as less importance with moderate impact. Evaluation results of the three study sample areas had an obvious relationship with the process of agricultural industrialization,order of the comprehensive effect was YQ-I(rapid advance)>YQ-II(accelerated advance)>YQ-III(relatively slow advance),and the effect level was good,medium,and poor respectively. And in single effect,there were disequilibrium features between economy effect and society effect,which included disequilibrium of index classification,effect classification,and the study sample area inside. However,accompanied by speeding up agricultural industrialization process,the gap between economy effect and society effect was closing from 22.25 times of YQ-III to 1.21 times of YQ-II,0.77 times of YQ-I. Based on analysis of evaluation results,we considered that,in addition to following the generalized target,content and technical requirements,giving play to the supporting role of well-facilitied capital farmland construction in mountain and hilly area,should also definitely aim at practical demand of regional agricultural development. Among the three studied areas,experience of YQ-I was worth learning,and its specific practice consisted of three steps. First step was to discover regional advantages of agricultural resources and industry.Second step was to combine well-facilitied capital farmland construction with land circulation,agricultural industrialization and scale management.The third step was to transform farming plots,constructed supporting agricultural infrastructure according to demands of different agricultural industries and moderate scale management. By means of the three steps,YQ-I answeredthe needed-facilitied capital farmland construction on how to improve agricultural production conditions,and how to construct agricultural infrastructure,especially realized benign interaction between farmland construction and agricultural industrialization. However,problem of YQ-II still needed to rethink. The key was to pay more attention to new agricultural operators’ role in well-facilitied capital farmland construction,and built a mechanism from point-based nursing experiences and succeeded practice to surface-based popularization and application. Lessons of YQ-III should be remembered. Well-facilitied capital farmland construction cannot be divorced from agricultural industrialization,and removed from agricultural structure adjustment,land circulation,moderate scale management,and new operators’ development. In conclusion,under the guide of agricultural industrialization mountain and hilly area can be able to effectively utilize the supporting role of well-facilitied capital farmland construction,and realized better successor-nursing by means of new operators. Meanwhile,the evaluation method based on entropy weight method and improved TOPSIS model can be also effectively used to evaluate economy and society effect of well-facilitied capital farmland construction.
land use;economy;models;well-facilitied capital farmland;entropy;effect;post-evaluation
10.11975/j.issn.1002-6819.2017.01.033
F301.2
A
1002-6819(2017)-01-0238-12
信桂新,楊朝現(xiàn),楊慶媛,李承檜,魏朝富. 用熵權(quán)法和改進(jìn)TOPSIS模型評價(jià)高標(biāo)準(zhǔn)基本農(nóng)田建設(shè)后效應(yīng)[J]. 農(nóng)業(yè)工程學(xué)報(bào),2017,33(1):238-249.
10.11975/j.issn.1002-6819.2017.01.033 http://www.tcsae.org
Xin Guixin,Yang Chaoxian,Yang Qingyuan,Li Chenghui,Wei Chaofu. Post-evaluation of well-facilitied capital farmland construction based on entropy weight method and improved TOPSIS model[J]. Transactions of the Chinese Society of Agricultural Engineering(Transactions of the CSAE),2017,33(1):238-249.(in Chinese with English abstract)doi:10.11975/j.issn.1002- 6819.2017.01.033 http://www.tcsae.org
2016-07-06
2016-10-26
國家科技支撐計(jì)劃項(xiàng)目(2013BAJ11B02)
信桂新,男,山東鄒平人,博士生,研究方向?yàn)橥恋乩米兓c生態(tài)過程。重慶西南大學(xué)資源環(huán)境學(xué)院,400715。Email:xgx123@126.com
※通信作者:魏朝富,男,四川樂山人,博士,研究員,博導(dǎo),主要研究方向?yàn)橥寥牢锢砼c工程、土地利用工程。重慶 西南大學(xué)資源環(huán)境學(xué)院,400715。Email:weicf@swu.edu.cn