分别采用三元二次、一元二次和直线加平台等肥料效应模型,对龙江农场热垦525两年的“3414”试验数据进行分析.结果表明:三元二次模型模拟的最佳施肥量为N 0.1357 kg/株、P2O50.0648 kg/株、K2O0.0821 kg/.根据产量趋势特点,对一元二次和直线加平台2个一元模型进行比较,得到一元模型的最佳施肥量为N0.1051 kg/株、P2O5 0.1060 kg/株、K2O 0.1039 kg/株.由此可见,三元二次模型模拟的最佳施肥量只有部分指标高于一元模型.综合考虑,初步确定胶木兼优热垦525最佳施肥量为N 0.1051～0.1357 kg/株；P2O50.0648～0.1060 kg/株；K2O 0.0821～ 0.1039 kg/株.%Fertilizer recommended rates were simulated by the models of three-factor, one-factor, liner and platform based on two year's"3414" field experimental data of Reken 525 in Longjiang Farm. The results showed that the optimum fertilizer rate of three-factor model were N 0.135 7 kg/tree, P2O5 0.064 8 kg/tree and K2O 0.082 1 kg/tree. According to the characteristics of production trends, the optimum fertilizer rate of one-factor model were N 0.105 1 kg/tree, P2O5 0.106 0 kg/tree and K2O 0.103 9 kg/tree by comparing one-factor and liner and platform model. Some optimum fertilizer rate indicators of three -factor model were higher than one -factor model. Comprehensive consideration, the optimum fertilizer rate of Reken 525 initially identified as N 0.105 1-0.135 7 kg/tree, P2O5 0.064 8-0.106 0 kg/tree and K2O 0.082 1~0.103 9 kg/tree.
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