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小麦单位面积产量是由亩穗数、穗粒数和千粒重3个因素构成，三者随自然条件和品种特性的不同，对产量的影响效应各不相同．本文通过多元统计的方法，对5年的系统试验资料进行分析，讨论了春小麦产量构成因素对产量的贡献以及各因素之间的相互关系。得出结果：在春小麦中进人高产水平的田管条件下，对产量的贡献依次是穗粒数、穗数和粒重。
The yield per unit area of wheat is composed of three factors: the number of ears per panicle, the number of grains per ear and the weight of thousand kernels. The three effects on the yield vary with different natural conditions and varieties. In this paper, by means of multivariate statistics, the data of five years of systematic experiments were analyzed and the contribution of spring wheat yield components to yield and the correlation among the factors were discussed. The results showed that under the condition of field tube with high yield in spring wheat, the contribution to yield was, in turn, the number of grains per spike, the number of ears and grain weight.