软片土壤水分是影响作物生长的重要因素,经济有效地利用天然降水,对提高农作物产量具有极为重要的意义,尤其在干旱和半干旱地区更显得突出。利用地面覆盖物以减少地面蒸发,早已有人研究,如土幂(耙耱保墒)、砂幂、石幂、纸幂和近代的秸秆覆盖(免耕)等,都在农业生产上起到积极的作用,尤其是塑料薄膜应用于农田以来,保墒增温的增产效果更为明显,已经引起国内外许多学者的重视。 Film soil moisture is an important factor affecting crop growth. The economical and effective use of natural precipitation is of great importance to improve crop yield, especially in arid and semi-arid areas. The use of surface coverings to reduce ground evaporation has long been studied, such as soil power (harrowing soil moisture), sand power, stone power, paper power and modern straw mulching (no tillage) and so on, all play an active role in agricultural production Effect, especially plastic film used in farmland, increasing the effect of warming soil moisture is more obvious, has attracted the attention of many scholars at home and abroad.