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高麦草在河西走廊中段的生长条件下，播种次年可收获种子，通过分析各生长构件：叶、茎、叶鞘重量，第一节至第三节节长、第一叶片至第三叶片的叶片长、小穗数和穗长与单株穗重的关系，发现：在所有的生长构件中，穗重最重要的构成因素是叶鞘重（Ｘ＿３），其次是茎重（Ｘ＿２）和叶重（Ｘ＿１），通过叶鞘重对穗重产生间接正效应；穗长和小穗数是穗重形成的影响因素，表明高麦草的种子产量与营养器官密切相关，同步增长。穗重由构成因素和影响因素共同决定的预测回归模型为：穗重（ｙ）＝０．１１９６－２．５６３茎重＋１．０７６叶鞘重＋０．０２０４穗长。
Under the condition of growing in the middle section of Hexi Corridor, the high-weed grass could harvest the seeds the following year after sowing. By analyzing the growth components of leaves, stems and leaf sheaths, the first to third node length, the first leaf to the third leaf The results showed that the most important component of panicle weight was leaf sheath weight (X_3), followed by stem weight (X_2) and leaf weight ( X_1). The spike length and spikelet number were the important factors affecting the panicle weight formation, which indicated that the seed yield of P. solanacearum was closely related to vegetative organs and increased synchronously. The predicted regression models of panicle weight determined by the factors and influencing factors were as follows: Spike weight (y) = 0.1196-2.563 Stem weight + 1.076 Leaf sheath weight +0.0204 Spike length.