关于测土配方施肥中土壤供肥性能的研究  

Properties of Soil Nutrient-supply in the Balanced Fertilization Practices

作　　者：银英梅[1] 银友善[1] 韩凤群[1] 于国峰[1] 商晓芳[1] 张中原[2] 

机构地区：[1]沈阳市苏家屯区农业技术推广中心,沈阳110101 [2]沈阳市土肥站,沈阳110034

出　　处：《黑龙江农业科学》2006年第4期44-49,共6页Heilongjiang Agricultural Sciences

摘　　要：土壤供肥量是配方施肥中关键的参数,决定平衡施肥的精度。以田间试验所设的缺素区产量代替无肥区产量,所建立的定产式更逼近实际,增加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与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,在两种作物、30个供肥指标中,吻合度大于90%的占96.7%。三种供肥方法均能使配方施肥建议施肥量达到定量水平。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 decreaes 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：土壤供肥量 定产式 测土值 校正系数 有效养分 相对产量 

分 类 号：S147.2[农业科学—肥料学]