摘要
本试验以几个比较稳定的小麦品系为材料,比较了低播量(3.3公斤/亩)和标准播量(10公斤/亩)下的收获指数、生物产量和籽粒产量间的相互关系。结果表明,收获指数与籽粒产量和生物产量与籽粒产量之间均呈正相关,而收获指数与生物产量呈负相关。两种播量下的收获指数间简单相关系数和等级相关系数均高于籽粒产量间的相关系数,表明不同密度下收获指数的稳定性高于籽粒产量。但是,由于低播量下的收获指数与标准播量下的籽粒产量间的相关系数(r=0.70)小于两种播量下的籽粒产量间的相关系数(r=0.8),所以在密度较低的情况下选育高产类型时据收获指数选择仍不、及据籽粒产量本身的选择效果。
In this experiment,the interrelations among harvest index,biomass yield and grain yield of 12 winter wheat purelines were compared under low (3.3 kg/mu)and standard(10 kg/mu)seeding rates.The results showed that harvest index and biomass yield were all positively correlated with grain yield,while the correlation between harvest index and biomass yield was negative.The simple and rank correlation coefficients of harvest index under the two seeding rates were higher than that of grain yield, indicating that harvest index was more stable than grain yield under the different seeding rates.In view of the fact that the correlation coefficient (r=0.70)between harvest index under the low seeding rate and grain yield under the standard seeding rate was lower than that of grain yield under the two seeding rates (r=0.82),however,under the low seeding rate selection for high grain yield with grain yield was more efficient than with harvest index.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
1989年第4期53-57,共5页
Journal of Hebei Agricultural University
关键词
小麦
收获指数
籽粒
产量
Harvest index
Biomass yield
Grain yield
Low seeding rate
Standard seeding rate
