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%.
出处
《土壤通报》
CAS
CSCD
北大核心
2002年第5期351-355,共5页
Chinese Journal of Soil Science
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
Soil nutrient-supplying
Formula
Soil nutrient
Corrected coefficient
Available nutrients
Relative output
