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当前世界人口猛增,对食品的需求必然增加,我国人口与粮食的矛盾更是日益尖锐。然而,农业生产的提高在一定程度上依赖肥料的投入,肥料在农作物增产因素中所起到的作用一般要占40％～60％,近几年来我国化肥用量增加了近一倍,而粮食产量却增加不到10%。化肥利用率低,而且还严重污染了环境,造成土壤板结,地表水严重污染,破
With the current world population soaring, the demand for food is bound to increase, and the contradiction between population and food in our country is becoming increasingly acute. However, the improvement of agricultural production relies to a certain extent on the input of fertilizers, and the contribution of fertilizers to crop yield increases generally accounts for 40% to 60%. In recent years, the amount of chemical fertilizers in our country has nearly doubled while the output of grain But increased less than 10%. Fertilizer utilization is low, but also a serious pollution of the environment, resulting in soil compaction, surface water, serious pollution, broken