[J].HEILONGJIANG AGRICULTURAL SCIENCES,2020,(08):31-37.[doi:10.11942/j.issn1002-2767.2020.08.0031]
高蛋白大豆肥效预测模型的正交多项式回归分析
- 关键词:
- 高蛋白大豆; 施肥; 产量; 多元正交多项式回归模型
- 文献标志码:
- A
- 摘要:
- 为优化高蛋白大豆生产中的肥料配施，采用多元正交多项式回归预测模型来反映氮磷钾肥施用量和大豆产量的依存关系。结果表明：随氮、钾肥施用量增加，大豆产量先增后降，大豆产量与磷肥用量正相关，肥效大小表现为氮肥>磷肥>钾肥；肥效预测模型方差估计值31.2616，预测高蛋白大豆产量U^的95%的置信区间为U〖DD(-*2〗^±1.96σ=U±61.2727，效果较好；经模型拟合，氮、钾、磷施肥量分别为56.39，70.22和140.00 kg?hm-2时，可得大豆最高产量3 365.73 kg?hm-2。多元正交多项式回归模型对预测多因素施肥水平下高蛋白大豆产量值有实际参考价值。
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备注/Memo
收稿日期：2020-05-14