战后以来,随着农业生产的发展和农作物单位面积产量的不断提高,肥料在农业生产中日益显示出其重要性。许多国家对肥源的开辟,增加肥料种类和改进施肥技术等进行了许多工作,并取得了一定进展。现将微量元素、微生物肥料和气肥的应用和发展趋势分述于下:一、微量元素最近十余年间在理论上着重探讨微量元素在植物和微生物的生理生化过程中的作用机制,发现了多数微量元素参与各种酶的作用,甚至是酶的活性中心的组成成分。在实际应用中研究了各种微量元素对作物产量和品质的影响,从果树开始,扩大到粮食作物、技术作 Since the war, with the development of agricultural production and the continuous improvement of crop yield per unit area, fertilizer has increasingly shown its importance in agricultural production. Many countries have done a lot of work on the development of fertilizer sources, increasing types of fertilizers and improving fertilization techniques, and have made some progress. The trace elements, microbial fertilizers and fertilizer applications and trends are described below: First, trace elements in recent years more than ten years in theory to explore the role of trace elements in the physiological and biochemical processes of plants and microorganisms and found that Most trace elements involved in the role of various enzymes, and even the active components of the enzyme composition. In practical application, the effects of various trace elements on the yield and quality of crops were studied. From the beginning of fruit trees, they were expanded to include food crops and techniques