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氮素供应时期对水稻产量因素形成的影响,过去国内外对常规水稻的研究很多。杂交水稻较之常规水稻,高产穗粒结构有其显著特点,生产实践中,对其追肥特别是中后期追肥的效果和施用适期争论颇多。因此,我们于1978年和1980年分别在不同密度、不同总用肥量基础上进行了氮肥不同施用时期的试验,以期探明氮素供应时期对杂交中
The impact of nitrogen supply on the formation of rice yield factors in the past, there are many studies on conventional rice at home and abroad. Compared with conventional rice, the hybrid rice has obvious characteristics of high-yield spike grain structure. In practice, there are many controversies about the effect and top-down period of top dressing, especially middle and late dressing. Therefore, we conducted experiments on different application periods of nitrogen fertilizer on the basis of different densities and total amount of fertilizer in 1978 and 1980, respectively, in order to find out the effect of nitrogen supply on hybridization