随着“两高一优”农业的不断发展和人口的增长，我国对粮食和农产品的需要日益增多，不但要求产量高，而且对农产品的质量也提出了更高的要求。目前一个比较突出的问题是地力下降十分严重，人们把注意力集中在见效快，现得力上，用化肥代替了农家肥使用，这不仅严重影响农作物 With the continuous development of “two high and one excellent” agriculture and population growth, the demand for food and agricultural products in our country is increasing day by day, which not only requires high output but also sets higher requirements on the quality of agricultural products. At present, a prominent problem is that the decline in soil fertility is very serious. People have focused their attention on quickening and now-effective farming, replacing fertilizers with farmyard manure, which not only seriously affects crops