【摘要】 在定西半干旱地区雨养农业区采用微集水种植技术 ,可有效地改善土壤供水能力、促苗早发、提高小麦产量和水分利用率。经试验 ,提前出苗 2～ 6 d,出苗率提高 11.0～ 17.9个百分点 ;土壤供水能力提高 4 6 .3%～ 158.0 % ;春小麦产量提高 34.4 %～ 58.8% ,水分利用率提高 2 .0 7～ 3.38kg/(mm·hm2 ) ,达到 6 .58～ 8.32 kg/(mm· hm2 )。该技术是适合于半干旱地区的一种能较好提高降水利用率的种植方式。更多还原

【Abstract】 In the arid areas Dingxi, application of water micro-collection in spring wheat farmland can effectively enhance the water supply capacity of soil, accelerate the growth and development of seedlings increase the yield and water use efficiency of wheat. Experimental results show that the date of seedling emergence is 2~6d earlier, the percentage of seedling emergence increases by 11.0%~17.9%, the water supply capacity of soil increase by 46.3%~158.0%, the wheat yield increases by 34.4%~58.8%, the water use efficiency increases by 2.07~3.38kg/(mm·hm2) and reaches 6.58~8.32kg/(mm·hm2). This technique is suitable to semiarid areas for the purpose of increasing rainwater use efficiency.更多还原