摘要
以 15个杂交中稻品种为材料 ,在高产栽培条件下 ,研究了灌浆期的库源特征与产量的关系。结果表明 :齐穗期和成熟期的LAI、地上部干物重均分别与产量呈极显著正相关 ,齐穗期消光系数、LAI衰减率分别与产量呈极显著负相关 ,库大源足是高产品种的重要特征。高产品种每hm2 产量 90 0 0kg以上的库源特征为 :齐穗期的LAI 6 .5～ 7.0 ,成熟期的LAI 3.5～ 4.0 ,成熟期的生物产量每hm2 1875 0kg左右 ,每hm2 颖花数 375 0 0万朵以上 ,齐穗期叶粒比 1.7cm2 /粒左右。
Fifteen hybrid mid-season rice combinations were used to study the relationship between sink-source characteristics and grain yield at the seed-filling stage of the plants under high-yielding cultivation conditions.Highly significant positive correlation was shown to be present between LAI and shoot dry weight at the full heading and ripening stages,on the one hand,and grain yield,on the other.Extinction coefficient and attenuation rate of LAI at the full heading stage were in highly significant negative correlation with grain yield.High-yielding genotypes were generally characterized by large source and large sink.High-yielding combinations,with a yield of 9000kg/hm 2 or more,shared the following sink-source characteristics:LAI 6.5～7.0 at the full-heading and 3.5～4.0 at maturation;biomass yield 18750 kg/hm 2 at maturation;spikelet number over 37500 per hectare,and the ratio of leaf area to grain about 1.7 cm 2/grain.
出处
《西南农业大学学报（自然科学版）》
CSCD
北大核心
2001年第2期120-122,共3页
Journal of Southwest Agricultural University
基金
农业部跨越计划资助项目
关键词
杂交中稻
高产品种
库源特征
灌浆期
hybrid mid-season rice
high-yielding combination
sink-source characteristics
