作物学报2016，Vol.42Issue(7)：1058-1066,9.DOI:10.3724/SP.J.1006.2016.01058
基于大型称重式蒸渗仪研究北疆滴灌麦田蒸散量
Measurement of Evapotranspiration for Drip-Irrigated Winter Wheat Using Large Weighing Lysimeter in Northern Xinjiang
摘要
Abstract
Drip-irrigation is a promising water-saving technique in arid agricultural area. To sep up efficient drip-irrigation sys-tems for winter wheat grown in northern Xinjiang table land, we measured the evapotranspiration (ET) rate ofwheat field using large-scale weighing lysimeter and analyzed the temporal responses of ET (in growing phase, daily and hourly) to air temperature, relative humidity and wind speed. Three treatments were designed with irrigation amounts of 375 (D1), 600 (D2), and 750 mm (D3). During the whole growing period of wheat, daily ET rate varied in different phases, showing heading–milk > joint-ing–heading > milk–maturity > regreening–jointing > sowing–overwintering > overwintering–regreening. During a day, hourly ET was in high level from 8:00 to 20:00 and stable from 20:00 to 8:00 of next, which varied with weather condition. Under drip-irrigation condition, the ratio of soil evaporation to ET was 25.2–28.3% during the entire growing season. Soil evaporation could be predicted with soil moisture and leaf area index using a bivariate quadratic function (R2 > 0.98). Based on a combination of yield and water use efficiency, we suggest 600–650 mm as the optimum irrigation amount under the drip-irrigated winter wheat field.关键词
滴灌/冬小麦/农田水分蒸散/棵间蒸发Key words
Drip-irrigated/Winter wheat/Evapotranspiration/Evaporation引用本文复制引用
李杰,吴杨焕,陈锐,杨平,柴顺喜,崔静,马富裕..基于大型称重式蒸渗仪研究北疆滴灌麦田蒸散量[J].作物学报,2016,42(7):1058-1066,9.基金项目
本研究由国家自然科学基金项目(31160260)和国家高技术研究发展计划(863计划)项目(2011AA100508)资助。 This study was supported by the National Natural Science Foundation of China (31160260) and National High-tech Research and Development Program (863 Program) of China (2011AA100508) （31160260）
