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施肥是作物增产的重要手段。尤其是化肥施用,已成为现代农业生产中一项重要的技术措施。据联合国粮农组织以及各国专家的估计,粮食增产量中,30％～60％应归功于化肥的施用。中国农科院土壤肥料研究所张夫道等统计分析了我国解放后三十年农作物产量后指出,我国粮棉总产水平与化肥氮磷钾施用水平呈极显著的正相关。但另一方面,随着化肥等商品能投入的增加,使农业对外界的依赖性越来越大。1987年我国化肥施用量已达8377万吨,比1980年增加57.5％。化肥投入要占农作物生产物
Fertilization is an important means of crop yield. Fertilizer application, in particular, has become an important technical measure in modern agricultural production. According to the UN Food and Agriculture Organization (FAO) and experts from all countries, 30% to 60% of the increase in grain output is attributed to the use of fertilizers. Zhang Fu Road, Institute of Soil and Fertilizer, Chinese Academy of Agricultural Sciences and other statistical analysis of China’s thirty years after the liberation of crop yields pointed out that China’s total output of grain and cotton fertilizer and nitrogen, phosphorus and potassium application levels were significantly and significantly positive correlation. However, on the other hand, with the increase of input of fertilizers and other commodities, the dependence of agriculture on the outside world is getting bigger and bigger. In 1987, the amount of chemical fertilizers applied in China reached 83.77 million tons, an increase of 57.5% over 1980. Fertilizer input to account for crop products