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近年来,生产上化肥的施用量越来越多,而有机肥料在生产上的应用逐年减少,致使土地板结,有效养分下降,影响作物产量。因此推广应用玉米秸杆、稻草、麦田等直接还田新技术,可以增补土地中有机质含量、提高土地肥力,改良土壤结构,提高作物的产量。 秸杆还田能够改善土地的结构性、有利于新鲜腐殖质在土体外部形成,与土粒结合,促成土地团粒结构,避免腐熟后施用时腐殖质由于干燥变性而失效。通过秸杆还田,还可使土地容性下降、孔隙度增加,紧实变松、地温升高,提高土地含水率。
In recent years, more and more chemical fertilizers are used in production, and the application of organic fertilizers in production has been decreasing year by year, resulting in the compaction of land and the drop of effective nutrients, affecting crop yield. Therefore, the popularization and application of new technologies such as corn straw, straw and wheat fields can directly increase the organic matter content in the land, increase the fertility of the land, improve the soil structure and increase the crop yield. Straw to improve the structure of the land is conducive to the formation of fresh humus in the soil outside the body, with the soil particles, resulting in soil aggregate structure, to avoid humus after maturity due to dry degeneration failure. Through straw returning, but also make the land capacity decline, porosity increases, tight loose, ground temperature rise, increase the water content of the land.