【摘要】 针对华北高产粮区进行了冬小麦节水增产试验研究 ,随着灌水次数和灌溉水量的增加 ,冬小麦总耗水量也增加 ,冬小麦消耗土壤水的份额逐渐减少 ,主要以消耗灌溉水为主。 2 0 0～ 30 0 cm土层的土壤水随着灌溉水量的增加 ,利用率逐渐减小 ,最佳灌水模式为春季 2水 (试验年份为偏旱年型 )。冬小麦产量为 771 6.7kg/hm2 ,水分利用效率为 1 5 .92 kg/hm2·mm,灌溉水利用效率为 34 .3kg/hm2·mm。更多还原

【Abstract】 A field experiment for optimal irrigation regime in winter wheat, aimed to yield improving and water saving, was carried out in Huantai county of Shandong province. The research results showed that with increasing irrigation time and irrigation quota, total water consumption increase. However, the ratio of consumed soil to total water consumption decline. As irrigation quota increase, the ratio of consumed water to total stored water in soil layer of 200 cm to 300 cm will lowered sharply. The optimal irrigation regime is irrigating one time in spring and another in autumn(based on relative drought year). Under this irrigation regime, winter wheat yield reached 7716.67 kg/km 2, water use efficiency was 15.92 kg/(hm 2·mm), and irrigation water use efficiency 34.3 kg/(hm 2·mm).更多还原