Liu Hongbin,Wu Wei.Multivariate Statistical Analysis of Yield-determining Factors[J].Research of Soil and Water Conservation,1995,2(01):51-55.
产量决定因子的多元统计分析
- Title:
- Multivariate Statistical Analysis of Yield-determining Factors
- 摘要:
- 运用多元统计方法选取产量决定因子，并评价它们的相对重要性。用主成分分析将水稻生长环境中的一系列影响产量的因子概括为四个主要因子；1）土壤有机质因子；2）土壤酸碱度因子；3）土壤粘粒因子；4）土壤全钾因子。将上述因子的得分作为自变量，水稻产量作为因变量，进行逐步回归分析，得到一个产量预测模型。方程的相关系数（R）达0.6541，各因子对产量影响的大小顺序为：土壤粘粒因子>土壤有机质因子。土壤酸碱度因子和土壤全钾因子对水稻产量的影响未达到显着性水平。
- Abstract:
- The aim of this study was to develop a multivariate statistical method to identify yielddetermining factors and evaluate their relative magnitudes. Mang environmentally influent factors of rice yeild were Summarized to four main factors by Principal component analysis. Four major factors were 1) Soil organic matter, 2) Soil acidity and alkalinity, 3) Soil clay grain content and 4) Soil potassium. Taking scores of the above factors as independent variables and rice yield as dependent variable, by stepwise regression analysis, a yield predication function was derived. The coefficient of determination(R)reached 0.654 1, and the magnitude of each factor effect on yield was Soil claySoil agranic matterSoil acidity and alkalinity as well as Soil potassium were not significiant to yield-determining.
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备注/Memo
收稿日期:1994-6-30