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试验研究结果初步明确：１．在相同的土壤条件、生态环境和栽培技术条件下，矮秆品种与籼型杂交稻组合产量比高秆品种高，光合产物积累多，Ｎ素的吸收积累也较多。Ｎ素积累量增加幅度与干物质增加幅度大致同步。Ｎ素的吸收积累９０％左右皆依赖于齐穗前的积累，不同历史阶段主栽品种积累量差异很大；齐德后各品种Ｎ素的吸收积累量差异不大，一般占总积累量的１０％左右。２．较高产的籼型杂交稻与矮秆品种所吸收的Ｎ大部分积累在叶部，这对稻株增加光合能力、提高光合生产力有利。齐穗前积累Ｎ素较多的品种与器官齐穗后转移再利用的数量与比例也较大，构成籽粒Ｎ素积累量的比例也较大。
Experimental results initially clear: 1. Under the same soil conditions, ecological environment and cultivation techniques, the combination yield of dwarf and indica hybrid rice was higher than that of high-stalk varieties, more photosynthetic products were accumulated and more N was absorbed and accumulated. The increase in N accumulation is roughly in line with the increase in dry matter. Accumulation of N uptake and accumulation by about 90% all depends on the accumulation before heading, and the accumulation amount of main cultivars varies greatly in different historical stages. There is no significant difference in the accumulation of N in all varieties after Qide, About 10%. 2. Most of the N absorbed by higher yielding indica hybrid rice and dwarf varieties accumulated in the leaves, which is beneficial to increase photosynthetic capacity and photosynthetic productivity of rice plants. The amount and proportion of varieties with more N accumulated before heading and the number of organs transferred and reused after harvesting were also larger, and the proportion of N accumulation in grains was also larger.