山楂产量对施肥量的动态变化

目的]建立评估模型预测山楂的最佳施肥量。方法]以山楂产量随施肥量动态变化为数据源构建Logistic回归模型。结果]Logistic方程拟合优度(R2)为0.91271,Logistic方程拟合效果好,模型选择正确,预测结果较真。结论]模型预测表明山楂栽培过程中施用氮磷钾复合肥的最宜施用浓度为48.84 g/株,可在成本最低情况下获得较高产量。

Dynamic Change of Hawthorn Yield to N,P,and K Fertilizer Application Amount

Objective]The aim of this study was to establish an evaluation model to predict the best fertilization amount of hawthorn.Method]A Logistic regression model was established based on the dynamic change of hawthorn yield with fertilizer application.Result]The results showed that the goodness of fit(R2)of Logistic equation was 0.91271,which indicated that the fitting effect of Logistic equation was good,and the model selection was correct,and the prediction result was accurate.Conclusion]The model predicted that the optimal concentration of N,P,K fertilizer was 48.84 g/plant in the cultivation process of hawthorn with a prospective higher yield along with a lower cost.