干物质分配是作物生长模拟模型中的关键成分。本文根据对大量试验资料的分析与处理 ,建立了小麦一生中各器官分配指数随生育进程连续变化的动态关系 ,并以收获指数作为遗传参数调节不同品种穗部的分配比例 ,从而预测不同品种各器官的物质增长动态。模型的检验结果表明 ,模拟值与观察值之间具有较高的符合度 ,平均相对误差小于 8%。 Dry matter distribution is a key component of the crop growth simulation model. In this paper, based on the analysis and processing of a large number of experimental data, the dynamic relationship of the successive changes of the distribution index of various organs during the whole growth period of wheat was established. The harvest index as a genetic parameter was used to adjust the distribution proportion of different varieties of ear, Organ matter growth dynamics. The test results of the model show that there is a good agreement between the simulated value and the observed value, and the average relative error is less than 8%.