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对协优64水稻进行的再生两熟盆栽试验表明,头季稻吸氮高峰出现在栽秧至分蘖及再生芽萌生阶段,其平均吸氮速率与再生稻相似。水稻再生两熟栽培,头季稻所吸收的氮量达两季稻吸氮总量的70%以上,而再生稻对头季稻茬中氮素的再利用率达31.0—41.5%。再生稻的稻谷重约为头季稻的70%,且经济系数大大高于头季稻,因此,水稻再生两熟是有利于物质和能量转化的栽培方式。
The two-pot experiment of regenerative double-ripening on Xieyou 64 showed that the peak of nitrogen uptake in the first season appeared in the stage of seedling to tillering and regenerating bud initiation, and the average nitrogen uptake rate was similar to that of ratoon rice. In the two-cropping cultivation of rice, the uptake of nitrogen by the first season rice reached more than 70% of the total nitrogen absorption by the two season rice, while the reutilization rate of the regenerative rice reached 31.0-41.5% of the first season. The weight of ratoon rice is about 70% of that of the first season rice, and the economic coefficient is much higher than the first season rice. Therefore, the two ripening rice is a cultivation method that is conducive to material and energy conversion.