论文部分内容阅读
水稻是我国重要的粮食作物。讨论水稻生育中期施肥的问题对于改善水稻栽培技术、提高单位面积产量和发展水稻生理学研究都是有意义的。一、水稻幼穗发育过程中颖花和枝梗退化现象前人的研究指出,水稻幼穗在发育过程颖花和枝梗退化现象普遍存在,而且严重。根据观察,在大田栽培条件下,稻穗第一次枝梗平均退化率为3.8％,第二次枝梗平均退化率为42.7％,颖花平均退化率为25.8％,而且退化的颖花9/10是在进入雌雄蕊形成期后,其余进
Rice is an important grain crop in China. Discussing the problem of mid-term fertilization in rice development is of great significance for improving rice cultivation techniques, increasing yield per unit area and developing rice physiology. I. Degradation of spikelets and branches in the process of panicle development in rice Previous studies have shown that the spikelets and branches of rice panicles degenerate during the development and are serious. According to the observation, under the field cultivation conditions, the average percentage of first branchy stems was 3.8%, the average percentage of second branchlets was 42.7%, the average rate of spikelets was 25.8%, and the degenerated spikelets 9 / 10 is after entering the formation of stamens, the rest into