论文部分内容阅读
在位于晋西南黄土残塬沟壑区的隰县旱地进行了渗水地膜覆盖玉米种植试验.结果表明,与常规地膜覆盖比较,渗水地膜覆盖玉米增产38.3％,增产效果显著;玉米生育期0~100CM土层内土壤含水量平均提高2个百分点,天然降水的水分粮食生产效率达到23.25KG?MM－1?HM－2;当气温在35℃以下时,渗水地膜与常规微膜具有相同的增温效果,当气温在35℃以上时,渗水地膜下的增温速度明显减慢;玉米生育期株高、茎粗、鲜重、叶数、最大叶长、最大叶宽等指标都明显比常规地膜覆盖的好.“,”In order to use the small rainfall resources, water osmosis plastic membrane was exploited.This membrane has many functions that may make rain penetrate into soil, prevent water evaporation from top soil, increase soil temperature, modify the maximum temperature for soil, ventilate soil, and facilitate soil ventilation.The test of maize covered with water permeability plastic membrane in dryland in Xixian county showed that :①There was 38 3%increase in maize yield and 2 percent increase in soil water at...