摘要
通过遮光处理，研究不同时期遮光及遮光强度对大豆的产量及产量性状的影响。结果表明．从播种、3节期（V3期）、开花始期（R1期）和鼓粒始期（R3期）开始遮光至完熟期．遮光强度超过20％后．大豆株荚数、株粒数、株粒重、单株地上部生物量、百粒重及小区产量显著或极显著下降。早期（V3期以前）开始遮光50％至完熟期．大豆单株有效分枝数显著减少。3节期至完熟期遮光20％～30％、R5期至完熟期遮光20％～50％和全生育期遮光50％．大豆单株瘪荚数显著增加。对大豆株荚数、株粒数、株粒重、单株地上部生物量和小区产量影响，同一遮光强度．早期（V3期以前）开始遮光比中后期（R1期以后）开始遮光更显著,3节期（V3）开始遮光比今生育期遮光的影响程席相对较大;同一时期遮光．遮光强席强比遮光强席弱的影响更显著．
In order to studying the influence of shading period and intensity on the yield and the yield characters of soybean. The results showed that, shading 20 % -50 % from seeding, 3-node, flowering and filling stage to ripening stage, the number of pods per plant, the number of seeds per plant, the seeds weight per plant, the aerial part products per plant, 100-seeds weight and the yield per plot decreased significantly. Shading 50 % from early stage（before 3-node date） to ripening stage, the number of branches per plant decreased significantly. Shading 20 % - 30 % from 3-node stage to ripening stage, shading 20 % - 50 % from filing stage to ripening stage and shading 50 % during the whole growth period, the number of shrunken pods per plant increased significantly. Among the same shading intensity, the influence on the number of pods per plant, the number of seeds per plant, the seeds weight per plant, the aerial part products per plant and the yield per plot of soybean, shading from early stage to ripening stage is more significantly than shading from late stage to ripening stage, and shading from 3-node stage to ripening stage was more significantly than shading the growth period. Among the same shading period, the influence on the number of pods per plant, the number of seeds per plant, the .seeds weight per plant, the aerial part products per plant and the yield per plot of soybean, shading strong was more significantly than shading weak.
出处
《西南农业学报》
CSCD
2006年第2期265-269,共5页
Southwest China Journal of Agricultural Sciences
基金
广西壮族自治区青年科学基金资助项目(桂科青0135005)
关键词
大豆
遮光胁迫
产量性状
产量
soybean
shading intimidation
yield characters
yield
