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粮食“九连增”鼓舞着中国人,但是基于化肥强势投入的结果,这个好消息的背后也存在极大的隐忧。据有关研究显示:土壤基础地力对作物产量的贡献率总是大于60%,因此土壤本身健康与否是粮食增产的根本所在。事实上,单纯依靠化肥的增产效果在衰退。1975年,化肥的平均增产效果为:25kg谷粒/kg化肥;而到了2008年,这一数字变为8-9kg谷粒/kg化肥,出现这一现象的主要原因是我国土壤的基础地力在减弱。
Food “Nine plus” encouraged the Chinese, but based on the results of strong fertilizer investment, there are great hidden worries behind the good news. According to relevant research, the contribution rate of soil basic fertility to crop yield is always greater than 60%. Therefore, the health of the soil itself is the fundamental reason for the increase of grain output. In fact, the mere yield increase of fertilizers depends on the recession. In 1975, the average yield of chemical fertilizers was 25kg / kg fertilizer. By 2008, this figure was 8-9kg / kg of fertilizer. The main reason for this phenomenon is that the basic soil fertility of our country is between Weakened.