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        Study on the Ecological Adaptability of Fluecured Tobacco Variety Longjiang237 in Heilongjiang Tobacco Area

        2015-12-14 08:31:28EnjianQIUZiquanWEIXinZHONGRongpingCHENBaogangSONGChunjunWANGZunqiangLI
        Agricultural Science & Technology 2015年9期
        關鍵詞:中國煙草烤煙煙葉

        Enjian QIU, Ziquan WEI, Xin ZHONG, Rongping CHEN, Baogang SONG, Chunjun WANG,Zunqiang LI

        1. Mudanjiang Tobacco Science Research Institute of Heilongjiang Province Tobacco Corporation, Northeast Agricultural Experiment Station, CNTC,Mudanjiang 157011, China;

        2. Huanan Branch of Harbin Tobacco-leaf Corporation, Huanan 154400, China

        Longjiang 237, bred based on male sterile lines,is urgently developed to resist tobacco mosaic virus (TMV) in tobacco fields in Heilongjiang[1]. The research detailed and analyzed agronomic characters,characters during growth stage, disease tolerance, economic characters,appearance quality, physical characters, chemical components and sensory quality in order to provide references for development of characteristic highly-qualified tobaccos and rational layout of flue-cured tobacco cultivars in tobaccos fields in Heilongjiang.

        Materials and Methods

        Test cultivars and sites

        The test Variety was Longjiang 237. Specifically, regional tests were conducted in an experimental site of Mudanjiang Tobacco Science Research Institute in 2004, 2010 and 2011. During 2007-2008, the experimental sites were set in Suihua City,Jixian County and Bin County,with the treatment with NC89 as a control. In contrast, production tests were conducted in Zhaozhou County, Suihua City,Ning’an City,and Linkou County,with the treatment with Longjiang No.911 as a control in 2009 and a test was carried out in Ning’an with a treatment with NC89 as a control in 2012.

        Test methods

        The tests were conducted as per randomized block design, with three replications, and test plots totaled 45-60 m2. Besides, a field contrast experiment was conducted and the areas of different experimental plots tended to be volatile in the range of 1-2 hm2. Additionally, tobaccos fields were managed according to Heilongjiang Tobacco Comprehensive Standard System.

        Sampling and detection

        During 2010-2011,10 plants were sampled in every test plot for everytobacco Variety,and leaves on the 9th-13thleaf positions were totally collected to send to Zhengzhou Tobacco Research Institute for detection on appearance quality, chemical components and sensory quality. In 2012,100 plants were transplanted of every tobacco cultivar and tobaccos on the 8th-11thpositions and 14th-17thpositions were collected totally,which were also sent to Zhengzhou Tobacco Research Institute for detection on appearance quality, physical characters,chemical components and sensory quality.

        Identification methods

        Agronomical characters Agronomic characters were measured according to Investigating Methods of Agronomical Character of Tobacco (YC/T142-1998).

        Disease tolerance Disease tolerance of tobacco samples was identified according to Identification of Tobacco Cultivar Tolerance of Disease(YC/T2324-2008).

        Yield and quality identification After curing, tobacco cultivars were graded as per GB2635-92 and statistical work was made on yield, output value, average price and the proportion of highly-graded tobaccos per unit area.

        Appearance quality Appearance quality of samples was identified as per GB2635-92.

        Physical characters Physical characters were identified[3].

        Chemical components of tobaccos Specifically, total alkaloid, total nitrogen, reducing sugar, total sugar,potassium, chlorine and starch were detected according to YC/T 160-2002,YC/T161-2002,YC/T159-2002,YC/T159-2002, YC/T217-2007, YC/T162-2002 and YC/T216-2007,respectively.

        Sensory quality Sensory quality of the samples were detected by experts according to assessment factors on smoking and relevant technology procedures in Quality Detection Center of Zhengzhou Tobacco Research Institute.

        Table 1 The results of identification on appearance quality of raw tobaccos

        Results and Analysis

        Major botanical characters and agronomical characters

        On basis of previous testing results in the province, the plant of Longjiang237 is barrel-type; after topping, average plant height reaches 120.62 cm, the number of effective leaf totals 17.9, stem girth is 9.81 cm,internode distance is 6.58 cm, the length and width of Lumbar leaf are 61.84 and 31.84 cm, increasing by 20.57 cm, 0.6 leaves, 0.7, 1.4, 0.85,and 4.17 cm, respectively. The leaf is oval-shape and leaf tip is increasingly sharp;leaf appearance is wrinkled and looks dark green; main veins grow moderately in thickness. Besides,Longjiang237 grows uniformly in fields with strong growth vigor. Furthermore,the growth term after transplanting lasts for about 127 d,which is 6 d later compared with the control. Therefore,it is late ripening. It is tolerant to drought and soil barrenness, and has less demand on nitrogen. From top to down, leaves gradually grow mature and turn yellow. Additionally, it is tolerant to ripeness and it is easy for the cultivar to be cured.

        Quality of raw tobaccos

        Appearance quality of raw tobaccos According to identification results of Zhengzhou Tobacco Research Institute, the color of middle-part leaves of Longjiang237 were in the range of yellow-golden yellow, and several leaves were greenish. Tobacco maturity was dominated by ripe, supplemented by mature; leaf is dominated by open structure, supplemented by firm structure; tobacco body is dominated bymedium, supplemented by less thin;most tobaccos contain oily, and few contain rich; tobacco color intensity are in the range of moderate-strong.Compared with NC89, Longjiang237 has lightly colored middle-part leaves,moderate body, high-degree maturity,open leaf structure and concentrated color intensity. In general, appearance quality of Longjiang237 performed better compared with NC89(Table 1).

        Physical characters of raw tobaccos As shown in Table 2, middlepart leaves and upper-part leaves and the physical characters of Longjiang237 were better compared with NC89[3].

        Chemical components of raw tobaccos According to detection results of samples, nicotine of Longjiang Longjiang237 was in the range of 1.39%-2.70% and averaged 1.96%;total nitrogen was in 1.40% -1.80%and averaged 1.55%; reducing sugar was in 25.83%-31.79% and averaged 28.72%;the content of potassium was in 0.73%-1.33%and averaged 1.11%;the content of starch was in the range of 4.21%-6.05%and averaged 4.84%.Compared with NC89, the contents of nicotine, total nitrogen, chlorine and starch maintained lower of middle-part leaves of Longjiang237,but sugar content, reducing sugar-to-nicotine ratio,nitrogen-to-nicotine ratio, and potassium-to-chlorine ratio kept higher;chemical components among tobacco samples tended to be volatile upon growth years. Besides, of upper-part leaves of Longjiang237, nicotine, total nitrogen, and chlorine contents were lower, but reducing sugar-to-nicotine ratio and potassium-to-chlorine ratio were higher compared with the control.The rest indices showed little differences(Table 3).

        Table 2 The detection results of physical characters of raw tobaccos

        Table 3 The detection results of chemical components of raw tobaccos

        Sensory quality of raw tobaccos

        As shown in Table 4 and Table 5,tasted sweet, Longjiang237 performed moderately in terms of aroma quality,density, and strength. Besides, it had irritation,and qdor were in the range of medium-slightly heavier;combustibility was from strong to stronger; it was grey to greyish white. Compared with NC89, fragrance style and tastes of Longjiang237 kept similar,but sensory quality of three samples kept lower.

        Major economic characters

        As shown in Table 6, the yieldof Longjiang237 was in the range of 2 298.00-4 128.60 kg/hm2and averaged 3 011.22 kg/hm2; grade index was in the range of 0.39-0.65 and averaged 0.54; output value index was in the range of 1 122.39-2 350.64 and averaged 1 615.27;high class leaf rate was in 9.55%-36.20%and averaged 20.94%. It can be concluded that Longjiang237 takes advantages in terms of yield, grade index and output value index, which grew by 10.46%, 8.00% and 18.41%, and high class leaf rate was a little higher compared with NC89. As shown in Table 6, major economic characters of Longjiang237 all performed better compared with Longjiang237 in 2009.

        Table 4 Smoking assessment on sensory quality of raw tobaccos

        Table 5 Identification results of assessment

        Disease tolerance

        According to artificially induced identification and tolerance assessments, Longjiang237 was immune to TMV,and moderately sensitive to Brown spots, and PVY. In general,the comprehensive tolerance to diseases performed better compared with NC89[1],which is in consistent with survey on diseases in fields.

        Discussion

        Ecological factors lay foundation for tobacco quality characters and regional characteristics[4-5], playing a key role in tobacco quality and characteristics[4]. Besides, cultivation selection and cultivation are also crucial for tobacco quality[6],of which genotype is an intrinsic factor of genetic expression and cultivation technology has modifying effects on quality formation[4]. Most tobacco fields in Heilongjiang belong to sub-appropriate regions for flue-cured tobacco growth[3], and the tobaccos are most used as stuffing[3,7],which contain higher sugar,and low contents of nicotine,total nitrogen,potassium oxide.It is notable that potassium oxide,chloridion and total nitrogen contents affect smoking quality of tobaccos in Heilongjiang. For example, when the content of potassium oxide is below 1.5% or chloridion content exceeds 0.6%,the smoking quality would decline.Furthermore,the content of total nitrogen should be controlled within 1.8%.In addition, the content of sugar showed none significant correlation with smoking quality of tobaccos. In general, high sugar content, low alkali content, good fragrance quality, low strength and irritation,and low fragrance content make contribution to highly-qualified tobaccos in Heilongjiang used for staffing[7].On the other hand,tobacco industries or enterprises have different demands on fragrance,tobacco quality and grade structure of tobaccos,so that the demands on tobacco cultivars would be diversified. Therefore, the assessment indices of tobacco quality tend to be volatile upon tobacco producing regions. For instance, Shanhai Tobacco has special demands on tobaccos, covering good fragrance quality,fewer miscellaneous gases,lower strength and irritation, and pleasant remaining taste[7].It is necessary for development of highly-qualified and characteristic tobaccos to determine and respect quality demands of tobacco industries to obtain quality orientation by integration of genetic factors, eco-environment and cultivation technology.

        Tobacco is a special industrial crop,whose growth,yield,and quality are under influences of fertilization.In general,tobacco yield is increasing upon fertilizer quantity, but tobacco quality would decline by excessive fertilizers[8-9]. Besides,Longjiang237 and NC 89 differ dramatically in terms of fertilizer quantity.For example, quality of Longjiang237 declined when it was fertilized at the quantity the same with NC89. Hence,it is necessary to conduct research on effects of N fertilizers at different quantities on Longjiang237 in tobacco fields in Heilongjiang in order to provide scientific references for rational fertilization of N fertilizers and improving tobacco quality.

        Due to small number of sample and significant differences of indices upon years, it is urgent to research appearance quality, physical character,chemical components and sensory quality of Longjiang237.

        Table 6 Major economic characters of Longjiang No.237 in Heilongjiang

        Conclusions

        Longjiang237, immune to TMV,shows stable agricultural economic performance and application, contributed by strong growth vigor, high plant height, sparse internode distance, wide leaf, and good economic traits.

        The appearance quality of Longjiang237 is good, and physical traits are proper. The content of K drops significantly, which should be further enhanced. It is moderate aroma type and it feels still sweet for remaining taste. In practice, highlights should be given to aroma quality,odor,strength,irritation,and aftertaste.

        Additionally, because of low demands on nitrogen, high tolerance to soil infertility, Longjiang237 is suitable to be grown in fields with moderate or low fertility. In tobacco fields in Heilongjiang, N quantity applied for Longjiang237 reduces by 7.5-15 kg/hm2compared with NC89 and it is necessary to improve the proportion of nitrate nitrogen to about 75% (N∶P∶K of 1∶2∶3).Longjiang237 has a long growth stage after transplanting and turns yellow slowly. Therefore, the cultivar should be covered with ground films and transplanting should be conducted earlier to promote early growth and guarantee growth of upper-part leaves.

        [1]QIU EJ (邱恩建), CHEN RP (陳榮平),SONG BG(宋寶剛),et al.Breeding and characteristics of new flue-cured tobacco variety Longjiang 237(烤煙新品種龍江237 的選育及其特征特性)[J].Journal of Anhui Agricultural Sciences(安徽農(nóng)業(yè)科學),2014,42(2):347-350.

        [2]State Tobacco Monopoly Administration(國家煙草專賣局). Investigation methods of agronomical character of tobacco,China Tobacco Industry Standards(中華人民共和國煙草行業(yè)標準 煙草農(nóng)藝性狀調查方法)YC/T 142-1998[S].Beijing:Standards Press of China(北京:中國標準出版社),1998.

        [3]WANG YT(王彥亭),XIE JP(謝劍平),LI ZH(李志宏). Tobacco planting regionalization in China(中國煙草種植區(qū)劃)[M].Beijing: Science Press(北京:科學出版社),2010.

        [4]XU ZC (許自成),LIU GS (劉國順),LIU JH(劉金海),et al.Analysis of ecological factors and quality of flue-cured tobacco leaves in Tongshan tobacco-growing areas(銅山煙區(qū)生態(tài)因素和煙葉質量特點)[J]. Acta Ecologica Sinica (生態(tài)學報),2005,25(7):1748-1753.

        [5]SHAO L(邵 麗),JIN Y(晉艷),YANG YH(楊宇虹), et al. Influences of ecological conditions on the yield and quality of different flue-cured cultivars(生態(tài)條件對不同烤煙品種煙葉產(chǎn)質量的影響)[J].Tobacco Science&Technology(煙草科技),2002(10):40-45.

        [6]TANG YJ (唐遠駒).Formation and development of tobacco with characteristics(試論特色煙葉的形成和開發(fā))[J].Chinese Tobacco Science (中國煙草科學),2004,(1):10-13.

        [7]TANG ZQ (湯朝起),DON YQ (竇玉青),LIU W (劉 偉), et al. Relationship between major chemical compositions and smoke quality in flue-cured tobacco from Heilongjiang and Jilin provinces(黑龍江和吉林兩省烤煙主要化學成分與吸食品質的關系)[J]. Acta Tabacaria Sinica (中國煙草學報),2010,16 (z1):37-41.

        [8]LIN GH (林桂華),YANG SY (楊述元),SHANGGUAN KP(上官克攀),et al.Different fertilizer application technology on the yield and quality of flue-cured tobacco in Longyan(龍巖不同施肥技術對煙葉產(chǎn)量和質量的影響)[J]. Chinese Tobacco Science (中國煙草科學),2002,(3):34-36.

        [9]LI XJ(李雪君),DING YF(丁燕芳),LI SJ(李淑君),et al.Effects of different nitrogen application rates on yield and quality characters of flue-cured tobacco new varieties Yuyan 7 and Yuyan 9 (不同施氮量對烤煙新品種豫煙7 號 豫煙9 號產(chǎn)量和品質性狀的影響)[J]. Acta Agriculturae Jiangxi (江西農(nóng)業(yè)學報),2014,26(2):102-105.

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