【摘要】 分析了不同穗型不同行向水稻穗对行间的遮光时间、遮光部位及遮光长度,结果表明穗遮光时间在临界高度以上南北行向比东西行向长。对南北行向,穗遮光部位上午随时角的增加逐渐向下移动,东西行向在临界高度以上与南北行向趋势相似,在临界高度以下则随时角的增加先逐渐向下移动,而后又向上移动至临界高度。穗遮光长度在0至穗长之间。对比不同重量穗型可知,弯曲穗型穗对行间遮光影响小,对行内遮光影响大。更多还原

【Abstract】 The panicle shading of rice with different row directions and spike types was studied. It showed that the panicle shading time in N-S row was longer than that in W-E row on critical alti-tude. In the morning,the altitude of panicle shading moved from the spike top to bottom in N-S row. As to W-E row,the altitude of panicle shading was same to the N-S row at first,then the alti-tude of panicle shading from bottom to critical altitude. The panicle shading length was from zero to spike length.更多还原