水稻金优38产量构成因子分析

摘要

对水稻(Oryza sativa L.)金优38产量及其构成因子进行了分析,结果表明,变异系数由大到小依次为每穗实粒数、有效穗数、结实率、产量、穗长、千粒重；千粒重、每穗实粒数和有效穗数与产量的相关性均达显著水平;3个主导因子千粒重、每穗实粒数、有效穗数对产量的直接通径系数分别是0.603 5、0.4467、0.415 6.综合各分析结果,在金优38栽培过程中应主攻每穗实粒数和有效穗数,以达到增产的目的.%The yield and yield contributing factors of rice(Oryza saliva L.) "Jinyou38" was analyzed. The results showed that the variation coefficient ranked as spikelet number per panicle > effective panicle > seed setting rate >yield> ear length > 1 000-grain weight. 1 000-grain weight, spikelet number per panicle and effective panicle were significantly correlated to yield at 0.05 level. The result of path analysis of the most important factors showed that direct path coefficients of 1 000-grain weight, spikelet number per panicle, effective panicles to crop yield was 0.603 5, 0.446 7 and 0.415 6 respectively. In conclusion, spikelet number per panicle and effective panicle should be focused to increase the yield of Jinyou 38.