新疆农业科学2017，Vol.54Issue(12)：2164-2173,10.DOI:10.6048/j.issn.1001-4330.2017.12.002
遮阴条件下密度对滴灌冬小麦灌浆期光合日变化的影响
Effects of Shading and Planting Density on Photosynthetic Characteristics of Flag Leaves during Filling Stage of Winter Wheat under Drip Irrigation
摘要
Abstract
[Objective] To explore the diurnal variation of shading and planting density on photosynthetic characteristic of winter wheat's flag leaf during filling stage under drip irrigation.[Method] Five plant population experiments 450 × 104 plant/hm2 (M1),525 × 104 plant/hm2 (M2),600 × 104 plant/hm2 (M3),675 ×104 plant/hm2 (M4),750 × 104 plant/hm2 (M5) were conducted in the circumstance of natural light(S0) and shading 50％ (S1),respectively,and the leaf area index (LAI),chlorophyll content (SPAD),daily variation of flag's photosynthetic characteristic during filling stage and grain yield were observed to study the effects of different light conditions and population on above indexes of wheat.[Result] The results showed that LAI was descended significantly under S1 treatments,but SPAD was little higher than that of S0.Under shading condition,net photosynthetic rate (Pn),transpiration rate (Tr),stomatal conductance (Gs) were all decreased at different degree while intercellular CO2 concentration (Ci) increased,besides,spike number,grains per spike,1,000-grain weight and yield were significant lower than those of in natural light treatments,the extent of reduction were in order of 4.14％-11.44％,5.76％-9.05％,7.15-22.47％ and 16.12％-33.54％.[Conclusion] Comprehensive analysis of various indicators,in 50％ shading treatment,M2 treatment (5 million 250 thousand/(plants ·hm2)) had better performance in terms of the physiological indexes,the highest yield,5,250.26 kg/hm2,so it can be used as reference to the field production.关键词
冬小麦/遮阴/密度/滴灌/光合日变化/产量Key words
winter wheat/shading/planting density/drip irrigation/the diurnal variation of photosynthesis/yield分类
农业科技引用本文复制引用
张永强,陈兴武,赛力汗·赛,薛丽华,雷钧杰..遮阴条件下密度对滴灌冬小麦灌浆期光合日变化的影响[J].新疆农业科学,2017,54(12):2164-2173,10.基金项目
国家小麦产业技术体系乌鲁木齐综合试验站(CARS-3-49) （CARS-3-49）
新疆农业科学院青年基金项目(xjnkq-2016012) （xjnkq-2016012）
农业部荒漠绿洲作物生理生态与耕作重点实验室开放课题(25107020-201704)National Wheat Industrial Technology System:Urumqi Comprehensive Experimental Station (CARS-3-49) （25107020-201704）
Outstanding Young Scientific Talent Foundation of Xinjaing Academy of Agricultural Sciences(xjnkq-2016012) （xjnkq-2016012）
Oasis Crop Physiological Ecology and Cultivation Key Laboratory Open Subject of Ministry of Agriculture (25107020-201704) （25107020-201704）
