【摘要】 :1 995— 1 998年度 ,在镇原试区进行的主要粮食作物集雨节灌试验结果表明 :不同年型地膜冬小麦、地膜玉米关键生育期集雨节灌均具有显著的产量效率 ,可明显提高水分利用效率。无论降水年份的异同 ,集雨补灌的最佳时期冬小麦为拔节期 ,玉米为大喇叭口期 ;干旱年低量 (1 2、2 4m m )集雨在最佳时期补灌 ,较其它时期补灌的供水效率冬小麦、玉米分别提高 1 .9— 6 .3、1— 3倍 ,且等量水分在玉米关键期供给较小麦供水效率高 3倍左右 ,体现低量集雨对不同作物及关键期补灌的高补偿效应更多还原

【Abstract】 The rainwater collection and watersaving irrigation of filmmulched winter wheat and corn were conducted at Zhenyuan dryland experiment during 1995-1998. The results showed that critical periods of watersaving in winter wheat and corn were at the jointing stage and the tassel. IWUE increases by 1.9 to 6.3 times and 1 to 3 times irrigated with low amount water from 12 to 24mm at jointing the stage of winter wheat and tassel stage of corn respectively. At the same time, IWUE of the equal amount water used by winter wheat was three times higher than that in corm. It also showed that low amount water supply to different crops and critical growth period has high supplementary effects.更多还原