花草适时压青，不仅能增加肥效，提高利用率，改良土壤，还能充分满足后茬作物对养分的吸收。花草究竟何时压青最佳，主要从三个方面考虑：1．根据花草的产量和养分含量，所谓“犁早一泡水，犁迟一把渣”，就说明花草翻耕过早，产量和养分都不高，过迟植物组织老化难于分解。一 Flowers timely pressure green, not only can increase fertilizer efficiency, improve utilization, improve the soil, but also fully meet the following crop nutrients absorption. When exactly the best pressure flowers green, mainly from three aspects: 1. According to the yield and nutrient content of flowers, the so-called “plowing as soon as the first plow, plow a residue later,” indicating that the grass too early tillage, yield and nutrients are not high, too late plant tissue aging is difficult to break down. one