【摘要】 本试验结果表明:小麦籽粒体积在开花后4～16天增长最快,28天左右达最大值。粒重在开花后13～26天增长最快,36～40天达最大值,有时延至成热。粒重与最大体积呈极显著正相关(r=0.9344)。粒重、籽粒最大体积均与净同化率呈正相关。叶片、叶鞘、茎、颖壳对粒重的影响在品种间、年度间不同,其趋势是叶的贡献最大,茎次之。不同叶位上部叶组的作用最大,近根叶组次之,中部叶组起负作用。 本试验结果表明:在我省现有生产条件下,提高粒重的途径应着重促进营养器官生长良好,重视品种“源”“流”“库”能力的协调平衡。更多还原

【Abstract】 Analysis results showed that grain weight increased rapidly during the period of 13 to 26 days with the peak by 36 to 4 days after anthesis, on some occassions with the peak at ripening stage.The grain volume increased significantly 4 to 16 days with the peak about 28 days post-anthesis. It presented significant posttive correlation between the grain weight and the maximum volume of grain(r = 0.9324) .The net assimilation rate had a significant influence both on grain weight and the maximum volume. However the assimilation rate is the functional index of green parls(leave,,leaf-aheath,stem and hull).The effects of leave,leaf-sheath,stem and hull on grain weight were different with cultivars and years.Among them,leave contributed the most and stem the second.Path analyse of growth rate and functional duration of leave to grain weight indicated that.leave in higher position contributed the most to grain weight,the leave near roots was the second,leave in the middle position had negative effect on grain weight,, By quantitative comparison of "granary" <isource"atransportation"in eight cultivars, it indicated that the limiting factor of yield in 4 cultivars was"source". A conclusion from this experiment is that under the production conditions in Guizhou Province, the was for increasing grain weight is promoting vegetative growth and balancing the capacity of "granary ""source""transportation".更多还原