新疆农业科学2018，Vol.55Issue(10)：1775-1785,11.DOI:10.6048/j.issn.1001-4330.2018.10.002
不同水氮组合对滴灌冬小麦叶片保护性酶活性及产量的影响
Effects of Different Water and Nitrogen Combinations on Protective Enzyme Activities and Yield of Winter Wheat under Drip Irrigation
摘要
Abstract
[Objective] This project aims to study the effects of water and nitrogen combinations on the protective enzyme activities and the yield of winter wheat leaves under drip irrigation in the hope of revealing the physiological mechanism of water and nitrogen regulation and providing theoretical basis for water and nitrogen management of winter wheat in Xinjiang.[Method]Xindong 20 was selected as the experimental material, and the experimental design of water and nitrogen split zone was used to determine the changes of the four protective enzymes activities and the yield components under different water and nitrogen conditions.[Result] (1) Suitable water and nitrogen conditions could increase the activities of SOD, POD and CAT in wheat leaves. The combination of low water, low nitrogen and high water and high nitrogen produced higher MDA content. (2) Water and nitrogen had a strong coupling regulation effect on the MDA content and the protective enzyme activity. Under drought conditions, proper application of nitrogen fertilizer or irrigation under nitrogen deficiency conditions could effectively reduce the MDA content, increase the protective enzyme activity and promote the physiological activity of leaf cells. (3) With the increase of nitrogen application and irrigation, spikelet number, grain number per spike and 1, 000-grain weight increased first and then decreased. The yields of N3W2, N2W3 and N2W2 were significantly higher than those of other treatments. The order of regulation effect of water and nitrogen on yield components and yield was water supply effect＞ nitrogen supply effect＞ coupling effect.[Conclusion]The suitable water and nitrogen supply ranges in this region are 4, 050-5, 400 m3/hm2 and 207-276 kg/hm2, respectively. At this time, the degree of membrane lipid peroxidation in wheat leaves is small and the yield performance is the best.关键词
冬小麦/滴灌/水氮处理/保护性酶/产量Key words
winter wheat/drip irrigation/water and nitrogen treatment/protective enzymes/yield分类
农业科技引用本文复制引用
张迪,孙婷,王冀川,石元强,冉文星,徐雅丽..不同水氮组合对滴灌冬小麦叶片保护性酶活性及产量的影响[J].新疆农业科学,2018,55(10):1775-1785,11.基金项目
国家自然科学基金项目"新疆滴灌小麦水分高效利用原理及调控机制研究" (31260303) （31260303）
塔里木大学校长基金项目"滴灌小麦群体质量控制效应及高产途径研究" (TDZKGG201702) （TDZKGG201702）
少数民族聚居团场科技特派员科技帮扶三年行动专项"南疆粮食高产高效生产关键技术集成与示范" (2013AA002) （2013AA002）
塔里木大学大学生创新创业训练计划项目"氮肥运筹对滴灌小麦干物质积累及产量特征的调控效应" (2017059) （2017059）
