摘要:
通过调查分析不同产量水平再生稻的产量库的结构特征表明,在4个产量构成因素中,再生稻头季以每穗粒数与产量相关最密切,对产量的贡献率最高(0.785 0);再生季则以穗数与产量的相关最密切,对产量的贡献率最高(0.684 2)。再生稻超高产库特征是具有较大的库容量,再生稻无论头季还是再生季,库容量对稻谷产量的贡献均远大于结实率;每平方米总颖花数对库容量的贡献大于粒重;对每平方米总颖花数的贡献,头季是每穗粒数大于单位面积穗数,再生季则是单位面积穗数大于每穗粒数。再生稻要获得高产,头季应主攻大穗,而再生季则应培育多穗,以形成巨大的库容量。
Abstract:
The sink structure characters of different yield potential of ratooning rice were investigated.The results indicated that the relationship between spikelet number per panicle and yield was the most closely in the first season,and the contribution to yield was the highest.In the ratooning season,the relationship between panicle number and yield was the most closely, and the contribution was the highest.Super high-yielding ratooning rice had larger sink.Not only in the first season but also ratooning season,the sink volume made greater contribution to yield than seed setting, as well as the contribution of total spikelets number per m2 to yield was higher than that of grain weight.The contribution of spikelet number per panicle to total spikelet number per m2 was higner than panicle number per area in the first season, and the ratooning season was contrary.It is necessary to foster larger panicle to enlarge sink volume for obtaining higher yield in the first season, as well as to foster much panicle number in the ratooning season.
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