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由于受低平易涝地区的土壤、气候等自然因素的影响，产量不高不稳限制了水稻的进一步发展。本研究通过密度处理来探讨群体的干物质积累、分配及群体剖面构造，旨在为高产栽培模式的建立提供理论依据。试验结果表明，干物质积累呈“Ｓ”型曲线，有效分案终止期至抽穗期的群体生长率最高达２０克／平方米·日。灌浆阶段的群体生长率在１５克／平方米·日左右。叶片与茎鞘比由移栽期的１．０左右下降至抽穗期的０．３２。叶面积比自始至终在下降。不同密度问叶面积主要分布在２０～６０厘米之间。冠层内的光照分布里指数曲线，密植处理的相对照度在各个层次均明显低于稀植处理。
Due to the natural factors such as soil and climate in the low and moderate flood prone areas, the unstable output has limited the further development of rice. In this study, population density, dry matter accumulation, distribution and population structure were studied to provide a theoretical basis for the establishment of high-yielding cultivation patterns. The results showed that the accumulation of dry matter showed an “S” curve, and the population growth rate up to 20 g / m 2 · day from the effective cut-off date to the heading date. The population growth rate during the grain filling stage is about 15 g / m 2 · day. The leaf-to-stem-sheath ratio decreased from about 1.0 at transplanting to 0.32 at heading. Leaf area ratio decreased from start to finish. Asked the different density of leaf area is mainly distributed between 20 to 60 cm. The exponential curve of the light distribution in the canopy and the relative illuminance of the densely-grafted plants were significantly lower than those of the grafted plants at all levels.