Analysis of Yield-Determining Process and Its Application to Yield Prediction and Culture Improvement of Lowland Rice. : LXXXV. An investigation on the percentage of ripened grains from the point of analytical view of the number of spikelets per unit area.
Analysis of Yield-Determining Process and Its Application to Yield Prediction and Culture Improvement of Lowland Rice. : LXXXV. An investigation on the percentage of ripened grains from the point of analytical view of the number of spikelets per unit area.
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产量测定过程分析及其在低地水稻产量预测和栽培改良中的应用。
DOI：
10.1626/jcs.37.195
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发表时间：
1968
影响因子：
--
通讯作者：
A. Matsuzaki
中科院分区：
文献类型：
--
作者：
G. Wada;S. Matsushima;A. Matsuzaki
本文将近年来在不同栽培条件下生长的水稻植株按单位面积颖花数分为几类，并从单位面积颖花数的分析调查中研究了结实率。1.当单位面积小穗数极小时，单位面积小穗数的各组成部分（单位面积穗数、每穗小穗数、每穗一次枝梗数和二次枝梗数）与结实率均无明显关系。2.结实率随单位面积小穗数、每穗小穗数和每穗二次枝梗数的增加而递减，随单位面积穗数的增加而增加。3.当单位面积小穗数较大时，结实率与单位面积穗数呈极显著正相关，与每穗小穗数和二次穗分枝数呈极显著负相关。4.在单位面积小穗数较多的情况下，结实率随每穗小穗数的增加而降低，这可能是由于每穗小穗数的增加，使抽穗前鞘和秆中贮藏的碳水化合物和抽穗后光合产物的量减少。
After classifying the rice plants which grown under several cultural conditions in last few years into the several groups according to the number of spikelets per unit area, the authors studied the percentage of ripened grains from an analytical investigation of the number of spikelets per unit area, obtaining the following results. 1. When the number of spikelets per unit area was extremely small, no definite relation was found between the percentage of ripened grains and any component of the number of spikelets per unit area (i.e. the number of panicles per unit area, that of spikelets per panicle and that of primary and secondary rachis-branches per panicle). 2. The percentage of ripened grains showed a tendency to decrease progressively with an increase in the number of spikelets per unit area, spikelets per panicle and secondary rachis-branches per panicle, while it seemed to increase with an increase in the number of panicles per unit area. 3. When the number of spikelets per unit area was extremely large, the percentage of ripened grains was positively correlated with the number of panicles per unit area and negatively correlated with the number of spikelets per panicle as well as the number of secondary rachis-branches. 4. In case of the number of spikelets per unit area being large, the fact that the percentage of ripened grains decreased with an increase of the number of spikelets per panicle could be explained from the fact that the number of spikelets per panicle increased with a decrease of the amount of carbohydrates stored in sheaths and culms before heading and that of photosynthetic products after heading.