| In order to study effects of seeding date on yield and yield traits of direct sowing hybrid rice after rape harvest, this paper used 30 different genotype rice cultivars in 6 different sowing period for planting. The results showed that delayed seeding date had a negative effect on the panicles per, grains per panicle and yield per plant, produced positive effect on filled grain percentage and 1000 -grain weight on the whole. With the seeding date delaying, the genotypes of rice varieties of illed grain percentage and 1000-grain weight decreased less, the panicles per and grains per panicle decreased greatly. Based on the range and variation coefficient of yield per plant under different seeding dates,cluster analysis was performed on 30 genotypes, and the 30 genotypes were divided into insensitive type, intermediate type and sensitive type. Lastly, the paper picked out the seeding date postponed the insensitivity of 6 varieties of yield per plant, including Yixiang 3724, B-you827, C-you725, B-you0301, Yixiang2308, Hongyou2009. Key words院seeding date曰direct sowing after rape harvest曰hybrid rice曰yield and yield traits |
