Soil fertility and tea quality of tea plantation under sprinkler irrigation
MIAO Zimei1, LI Jingchun1*, CHEN Dong2, WANG Weihan3
1.School of Agricultural Equipment Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Huai′an Water Investigation, Design and Research Co.Ltd. Huaian, Jiangsu 223025, China; 3.Dean′s office, zhejiang University of water Resources and Electric Power, Hangzhou, Zhejiang 310018, China
Abstract:Based on the regulation of water under sprinkler irrigation, field experiments were conducted to investigate the tea soil fertility index(including soil nitrogen, soil temperature)and tea quality indexes(including amino acid, tea polyphenol)dynamic changes. The results show that total nitrogen(TN)in surface soil layer under sprinkler irrigation was the highest.With the increase of soil depth, TN content decreased, and TN content of sprinkler irrigation treatment was slightly higher than that of the conventional treatment. Changes of available nitrogen content presented the same trend as TN content. Compared with the conventional irrigation treatment, the average content of soil TN increased by 3.3%-22.2%, and the average content of available nitrogen increased by 7.1%-24.7% under the sprinkler irrigation treatment. Moreover, soil temperatures in surface soil layer and 20 cm soil layer of the sprinkler irrigation treatment were both higher than those of the conventional treatment. For surface soil layer, the soil temperature was lowest at 5:00, 1 hour in advance compared to the conventional treatment, and highest at 14:00, synchronized with the conventional treatment. For 20 cm soil layer, the soil temperature was lowest at 8:00, 2 hours in advance compared to the conventional treatment, and it was highest at 17: 00, nearly 2 hours in advance compared to the conventional treatment. In addition, the content of amino acids decreased first and then increased, while the tea polyphenol content increased first and then decreased. Both the contents of amino acid and tea polyphenol of the sprinkler irrigation treatment were higher than those of the conventional treatment. Compared to the conventional treatment, the content of amino acid increased by 12.21% and that of tea polyphenol increased by 17.03% under the sprinkler irrigation treatment.
[1]JENS E Q, MADS V B, ZORICA J,et al. Farmers′ incentives to save water with new irrigation systems and water taxation—a case study of Serbian potato production[J]. Agricultural water management,2010,98(3):465-471.[2]CHU L L, KANG Y H, WAN S Q.Effects of water application intensity of microsprinkler irrigation on water and salt environment and crop growth in coastal saline soils [J].Journal of integrative agriculture,2015,14(10):2077-2089.[3]XU J Z,PENG S Z,YANG S H,et al.Ammonia volatilization losses from a rice paddy with different irrigation and nitrogen managements [J].Agricultural water management,2012,104:184-192.[4]TAN X,SHAO D,LIU H,et al. Effects of alternate wetting and drying irrigation on percolation and nitrogen leaching in paddy fields [J].Paddy and water environment,2013,11(1/2/3/4):381-395.[5]XIAO M H,YU S E,SHE D L,et al.Nitrogen and phosphorus loss and optimal drainage time of paddy field under controlled drainage condition [J].Arabian journal of geosciences,2015,8:4411-4420.[6]唐劲驰,吴利荣,贾瑞昌,等.名优茶园节水技术研究[J].广东农业科学,2007(7):20-23. TANG Jinchi,WU Lirong,JIA Ruicang,et al.Research on water-saving technology of microsprinkle and drip irrigation in famous and superior tea garden [J].Guangdong agricultural science,2007(7):20-23.(in Chinese)[7]唐颢,吴家尧,黎健龙,等.茶园滴灌施肥的增产提质及土壤养分效应研究[J].茶叶科学,2013,33(1):85-90. TANG Ying,WU Jiarao,LI Jianlong,et al.Study on the influence of drip irrigated fertilization on tea yields,qua-lity and soil nutrient effect[J].Journal of tea science,2013,33(1):85-90.(in Chinese)[8]ZHOU L, XU H, MISCHKE S, et al. Exogenous abscisic acid significantly affects proteome in tea plant(Camellia sinensis)exposed to drought stress [J].Horticulture research,2014,1(14029):1-9.[9]UPADHYAYA H, DUTTA B K, PANDA S K.Zinc modulates drought-induced biochemical damages in tea [Camellia sinensis(L)O Kuntze][J].Journal of agricultural and food chemistry,2013,61(27):6660-6670.[10]DAS A,DAS S, MONDAL T K.Identification of diffe-rentially expressed gene profiles in young roots of tea [Camellia sinensis(L.)O.Kuntze] subjected to drought stress using suppression subtractive hybridization[J]. Plant molecular biology reporter,2012,30: 1088-1101.[11]王丽.不同灌水处理下铁观音茶树生理生化机制的研究[D].福州:福建农林大学,2008.[12]柯玉琴,庄重光,何华勤,等.不同灌溉处理对铁观音茶树光合作用的影响[J].应用生态学报,2008(10):2132-2136. KE Yuqing,ZHUANG Zhongguang,HE Huaqin,et al.Effects of different irrigation treatments on photosynthesis of Tiguanyin tea plants[J].Chinese journal of applied ecology,2008(10):2132-2136.(in Chinese)[13]谢一菁,戴柯伟,陈新海,等. 铁观音茶树的灌溉技术 Ⅱ.茶园节水灌溉的控制系统[J].福建农林大学学报(自然科学版),2010(2):139-142. XIE Yiqian,DAI Kewei,CHEN Xinhai,et al.Irrigation technology for Tiguanyin tea plants Ⅱ.Control system of water saving[J].Journal of Fujian Agriculture and Forestry University(natural science edition),2010(2):139-142.(in Chinese)[14]杨菲, 李蓓蓓, 何辰宇. 高温干旱对茶树生长和品质影响机理的研究进展[J]. 江苏农业科学, 2017, 45(3):10-13. YANG Fei,LI Beibei, HE Chenyu.Research progress of effects of high temperature and drought on growth and tea quality of Camellia sinensis [J].Jiangsu agricultural sciences, 2017, 45(3):10-13.(in Chinese)