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根据土壤养分状况施用肥料,这是世界各国普遍重视的一个问题.国内外的研究工作者曾提出过许多具有重要科学意义的论述,但实际回答生产上提出的问题,并当作计算参数予以成功的应用,目前还有一定距离.长春地区化肥用量增长迅速,1982年全区平均亩施肥用量达70斤.但经济效益有明显下降趋势.造成这种情况的重要原因之一是生产中对肥料的施用存在不同程度的盲目性.如何根据土壤养分状况科学地施用肥料,这是当前生产上有待尽快解决的一个问题.1979年以来,长春地区在全区二万平方公里的范围内应用航空象片进行了全幅员的大比例尺土壤普查,并在1981年结合土壤普查开展了广泛地因土施肥试
The application of fertilizers to soil nutrients is a problem that is of universal importance to all countries in the world, and many researchers at home and abroad have made many important scientific expositions, but actually answer the questions raised in production and make them successful as calculation parameters Of the application, there is still a certain distance.Changchun area, the rapid growth of fertilizer use, the average amount of mu fertilizer in the region in 1982 up to 70 kg, but the economic benefits have decreased significantly.One important reason for this situation is the production of fertilizer There are different degrees of blindness.How to apply fertilizer according to the soil nutrient status scientifically, which is a problem to be solved as soon as possible in the current production.At 1979, Changchun region in the region within the scope of 20,000 square kilometers of aviation applications A full-scale large-scale soil census was conducted and in 1981 a wide range of soil fertilization trials were conducted in conjunction with the Census of Soil