【摘要】 通过 1997～ 1998年旱地玉米农田地膜覆盖试验 ,结果表明 ,该项技术具有明显的抑蒸保墒作用 ,有效地提高降水在土壤中的保蓄率 ,土壤储水量、水分利用率明显增加。由于地膜覆盖的水分调控作用 ,促进了农田水分的良性循环 ,有利于作物生长和产量形成 ,玉米产量增加 1488.0 kg/hm2 ,降水利用效率和土壤水分利用效率分别提高 3.4 5和 4 .65kg/ ( mm·hm2 )。更多还原

【Abstract】 The effect of film mulching on water regulation was studied in Shou Yang area in 1997～1998. The results showed that the effects of anti evaporation and water storage are very marked. The water storage of soil and the water utilization ratio were increased due to the preservation of precipitation in field was rasied by mulching with film. It was beneficial to the growth of crop, the maize production and the WUE increased by 1488.0kg/hm 2 and 3.45, 4.65kg/(mm·hm 2) respectively.更多还原