耕作与栽培2025，Vol.45Issue(8)：32-37,6.
移栽密度对大秧龄水稻产量和干物质积累的影响
Effects of Transplanting Density on Yield and Dry Matter Accumulation in Rice with Large Seedling Age
摘要
Abstract
To investigate the effects of different transplanting densities under the same basic seedling number per unit area on the yield and dry matter accumulation of individual plants and populations in rice with large seedling age,the hybrid rice variety Zhuoliangyou1126 was selected for transplanting at a 60 day seedling age.Three transplanting densities were designed with a fixed basic seedling number per unit area for D1(12.50 hills/m2,4 seedlings per hill),D2(16.67 hills/m2,3 seedlings per hill),and D3(25.00 hills/m2,2 seedlings per hill).The effects of transplanting density on tiller development,yield,and dry matter accumulation at both population and individual levels were analyzed.The results showed that D3 sig-nificantly increased grains per panicle by 18.67%and 15.52%compared to D1 and D2,respectively.Dry matter accumula-tion per unit area at full heading stage and maturity stage increased by 24.48%and 13.73%(compared to D1 and D2)and 18.00%and 13.63%(compared to D1 and D2),respectively,with significant differences.The harvest index was signifi-cantly improved by 5.00%-6.97%.Under D1 treatment,the number of panicles at tillering peak,maximum seedlings,and effective panicles per hill were 35.23%-86.28%,38.05%-102.99%,and 39.14%-95.15%higher than those of D2 and D3,re-spectively,and the yield per hill was 30.78%-64.30%higher,with significant differences.Therefore,low density with more seedlings per hill favors individual plant development,while high density with fewer seedlings per hill better coordi-nates the relationship between individual plants and the population.Under the same basic seedling number,the D3 cultiva-tion method was recommended to enhance the yield of rice with large seedling age under unfavorable climatic conditions.关键词
移栽密度/大龄秧/水稻群体/个体Key words
transplanting density/large aged seedlings/rice population/individual plant分类
农业科技引用本文复制引用
张发丽,张恒栋,张建冲,王荣基,张佳凤,何志旺..移栽密度对大秧龄水稻产量和干物质积累的影响[J].耕作与栽培,2025,45(8):32-37,6.基金项目
贵州省基础研究计划项目(黔科合基础-ZK[2025]面上022) （黔科合基础-ZK[2025]面上022）
贵州省水稻现代产业技术体系-黔西南综合试验站(GZSDCYJSTX2024-07) （GZSDCYJSTX2024-07）
中央引导地方科技发展资金项目(黔科合中引地[2025]017号) （黔科合中引地[2025]017号）
