【摘要】 在宁夏南部山区对春小麦集雨补充灌溉研究表明 ,春小麦全生育期覆膜栽培能有效地抑制土壤蒸发 ,大幅度增加产量 ,提高水分利用率。在覆膜春小麦拨节期灌水 3 0 mm产量可增加 3 71.1kg/ hm2 ,水分利用率提高 11.2 % ,拨节期是地膜春小麦集雨节灌最佳补水时期。地膜春小麦拨节期 1次供水 3 0、60、90和 12 0 mm,与不灌水相比 ,小麦籽粒产量均有大幅度增加 ,增幅分别为 2 3 .4%、68.7%、10 5 .5 %和 98.3 %。分析认为 ,覆膜春小麦 1次补灌水量以 60 mm为宜更多还原

【Abstract】 Compared with no irrigation, irrigating a mount of 30 mm has an great effect on the yield of spring wheat with plastic-film mulching. During the jointing stage, 30 mm irrigation increased yield by 371.1 kg/hm 2 and water use efficiency by 11.2%. Taking precipitation distribution into consideration, the jointing stage is the best water-supplementing period of rain-collecting and water-saving irrigation of spring wheat with plastic-film mulching. About 30, 60, 90 and 120 mm irrigation water at one irrigation increased the grain yield by 23.4%, 68.7%, 105.5% and 98.3%, and water use efficiency was raised by 16.3%~67.2%. Irrigation efficiency is 16.1 kg/(mm·hm 2), 21.6 kg/(mm·hm 2), 22.1 kg/(mm·hm 2) and 15.43 kg/(mm·hm 2), respectively. So the optimal irrigation amount of spring wheat with plastic-film mulching is 60mm at one time.更多还原