论文部分内容阅读
1979～1982年对两个杂交种亩产千斤水平的干物质积累、分配及其对籽粒产量的影响进行了研究。发现高梁总干物质生产中开花前约占43%,开花后约占57%。籽粒产量主要依赖开花后光合作用的净同化率所同化,开花前提供约12～33%。同时观察到高梁生长后期茎叶干重多有回升。群体生长率的动态变化呈双峰曲线,其消长过程与产量形成关系密切。抽穗前和抽穗后以及总干物质生产都与籽粒产量呈显著正相关。根据试验数据提出了千斤产量群体生长率动态和物质生产模式,可供栽培工作者参考。
From 1979 to 1982, the accumulation and distribution of dry matter per mu of two hybrids and their effects on grain yield were studied. The total dry matter production of sorghum was found to be about 43% before flowering and about 57% after flowering. The yield of grain is mainly assimilated by the net assimilation rate of photosynthesis after flowering, providing about 12-33% before flowering. At the same time, it was observed that the dry weight of stems and leaves increased at the later stage of sorghum growth. The dynamic change of population growth rate showed a bimodal curve, and its growth and decline process was closely related to the yield formation. Pre-heading and post-heading as well as total dry matter production were significantly and positively correlated with grain yield. According to the experimental data, it puts forward the dynamic growth rate and material production mode of the population with heavy output, which can be used as reference for cultivating workers.