从控制养分释放着眼在农业生产中,施肥是一项重要的技术措施。但是,影响肥效的因素很多,例如,在热带和亚热带地区,雨水多,施下去的肥料很容易流失;而在酸性红黄壤地区,土壤中含有较多的铁、铝等物质,施下去的过磷酸钙,常常会形成极难溶解的磷酸铁或磷酸铝,使作物难以吸收利用……因此,长期以来人们就在研究如何有效地控制养分释放,减少养分损失,充分发挥肥料的效益,进一步提高作物产量和品质。过去,这方面的研究大都偏重于改善肥料的化学性质和物理性 From the control of nutrient release to focus on agricultural production, fertilization is an important technical measure. However, there are many factors that affect fertilizer efficiency. For example, in the tropical and subtropical regions, there is a lot of rain and fertilizers that can be applied are easily lost. In acidic red and yellow soils, the soil contains more iron, aluminum and other substances. Calcium phosphate often forms iron phosphate or aluminum phosphate, which is extremely difficult to dissolve, making it difficult for crops to absorb and utilize... Therefore, people have been investigating how to effectively control nutrient release, reduce nutrient losses, and fully utilize the benefits of fertilizer to further improve Crop yield and quality. In the past, most of this research has focused on improving the chemical properties and physical properties of fertilizers.