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绪言塑料薄膜地面覆盖栽培是现代农业生产一项新兴的改善作物生长环境的栽培技术,可以控制和改善土壤和近地层小气候的光、热和水份状况,为作物创造适宜的环境条件。由于地膜覆盖显著地提高了土壤温度,抑制了土壤水分蒸发,有效地改善了土壤小气候及土壤理化性状,加速了作物的生长发育,获得早熟、增产的良好效果。同时,由于地膜覆盖能有效地保持土壤水分,有很好的节水抗旱作用。据各地试验,一般能节约30—50％的灌溉水。地膜覆盖的节水抗旱作用,对于干旱地区搞好农业生产具有特殊重
INTRODUCTION Plastic film ground cover cultivation is an emerging cultivation technique for improving crop growth environment in modern agriculture. It can control and improve the light, heat and moisture status of soil and near-surface microclimate and create suitable environmental conditions for crops. As the plastic film mulching significantly increased the soil temperature, inhibited the evaporation of soil moisture, effectively improved the soil microclimate and soil physical and chemical properties, accelerated crop growth and development, access to early maturity, yield a good effect. At the same time, because the mulching can effectively maintain the soil moisture, it has a good effect of water saving and drought resistance. According to tests all over, generally save 30-50% of irrigation water. Water and drought resistance of plastic film mulching has a special bearing on improving agricultural production in arid areas