蛋肥无公害封闭式肥料常用的施肥方法，会造成一半以上肥料流失或挥发。而且长期使用化肥亦破坏了土壤结构，给土壤、水源、河流、环境等带来了严重污染。同时，林果等多年生作物，根系盘结于地表，也给施肥带来了困难。我局从７６年代开始进行大颗粒长效包膜肥料的施肥试... Egg fertilizer pollution-free closed-end fertilizer commonly used methods of fertilization, will result in more than half of fertilizer loss or volatilization. Moreover, long-term use of chemical fertilizers has also damaged the soil structure and caused serious pollution to soil, water sources, rivers and the environment. At the same time, perennial crops such as fruit are rooted at the surface and have also caused difficulties in fertilization. Since the 76’s, our bureau has been carrying out fertilizer application of large-particle long-term coated fertilizers.