关于平衡施肥中土壤供肥性能的研究  

Properties of Soil Nutrient-supply in the Balanced Fertilization Practices

作　　者：李金凤 姜娟 赵斌 路钰 张中原[2] 

机构地区：[1]辽宁省土肥总站,辽宁沈阳110034 [2]沈阳市土肥站,辽宁沈阳110034

出　　处：《土壤通报》2002年第5期351-355,共5页Chinese Journal of Soil Science

摘　　要：以田间试验所设的缺素区产量代替无肥区产量 ,所建立的定产式更接近实际 ,增加了土壤供肥量的计算量 ,减少施肥量。缺素区产量及其养分吸收量是计算土壤供肥量、土壤有效养分校正系数和相对产量等的基础参数。文中讨论的确定土壤供肥量的三种方法精度均较高 ,吻合度均大于 90 %。A formula was established by the outputs of nutrient-deficient plots instead of the CK plots, which is near to the natural conditions and lead to the increase of soil nutrient-supplying potential but the decrease of fertilization. The output and the amount of nutrient uptake at the nutrient deficient plots are the basic parameters for forecasting the soil nutrient-supplying capacity and correcting the coefficients of available nutrients. The three methods discussed in the paper had higher precision in the forecast of soil nutrient-supply. The fitting value was over 90%.

关 键 词：平衡施肥 土壤供肥性能 定产式 测土值 有效养分 校正系数 相对产量 

分 类 号：S147.2[农业科学—肥料学] S158[农业科学—农业基础科学]