【摘要】 试验在盆栽条件下采用人工剔除特定节位分蘖的方法研究水稻不同节位的生产能力、生长冗余现象以及产量的补偿能力。结果如下:不同处理水稻单株的有效穗数与单株产量、抽穗期单株叶面积及单株生物量有极显著的正相关,与平均穗重呈极显著的负相关;早发的低节位分蘖(1,2,3)是增加有效穗数、抽穗期叶面积及生物量的主要节位,但低节位分蘖同时也是导致水稻生长冗余,加剧资源消耗的主要节位;当低节位分蘖空位时,中节位(4,5,6)或高节位的分蘖(7,8,9)将会发挥其补偿潜力,虽有效穗减少,但平均穗重变大。更多还原

【Abstract】 In a pot experiment,tillers at specific stem nodes were artificially removed to study the productivity,growth redundancy and yield over-compensation capacity of rice plants.Seed-bearing tiller number was in a highly significant positive correlation with yield per plant,leaf area per plant at heading and biomass per plant,and in a highly significant negative correlation with mean spike weight.The lower nodes,where earlier tillers occur(1,2 and 3),were found to be mainly responsible for seed-bearing tiller number,leaf area per plant at heading and biomass per plant.On the other hand,these nodes tended to show growth redundancy and increased energy consumption.When tillers at nodes 1,2 and 3 were removed,tillers at the middle(nodes 4,5 and 6) or higher positions(nodes 7,8 and 9) would compensate the loss.Consequently,while the number of seed-bearing tillers decreased,the average seed weight per spike increased.更多还原