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本文提出一种变幂指数二次模型y=a+bxk+cx2k作为肥效方程进行施肥推荐。模型中的幂指数k是作为模型参数由非线性拟合求得。模型拟合准确度高,由模型所得推荐施肥量合理
This paper presents a variable exponential quadratic model y = a + bxk + cx2k fertilizer as a fertilizer equation recommendation. The power exponent k in the model is derived from the nonlinear fit as a model parameter. The accuracy of the model fitting is high, and the recommended amount of fertilization is reasonable from the model