草业学报2011，Vol.20Issue(6)：299-304,6.
行距对“川草2号”老芒麦生殖枝及种子产量性状的影响
Influences of row spacing on fertile tillers and characters of seed yield of Elymus sibiricus cv.Chuancao No.2
摘要
Abstract
A randomized block design was utilized with five row gradients (30, 45, 60, 75, and 90 cm) to measure and analyze the characters of shoots, inflorescence and seed yield of Elymus sibiricus cv. Chuancao No. 2. Row spacing had a highly significant affect on tillers, ratio of fertile tillers, fertile tillers per square metre, height of fertile tillers, and diameter of fertile tillers. This resulted in very significant differences among the length and diameter of ear stalks, cob lengths, spikelets and florets per fertile tiller. These results finally led to eventual differences among setting percent, presentation seed yield, and harvested seed yield. However, the total florets per square metre and the potential seed yield were stable at different row spacings. The partial correlation analysis further showed that plant height was the main factor affecting setting percent. The length of inflorescence stalk reflected the spikelets and seeds of fertile tillers and harvested seed yields. Thus we may predict setting percent and seed yield through plant height and length of inflorescence stalks. The 1 000-seed weight and other parameters were relatively stable. Comprehensive experimental data showed that sowing with a row space of 60 cm gave the greatest potential seed yield, presentation seed yield and harvested seed yield, and is therefore recommended to be widely using in practice.关键词
老芒麦/行距/种子产量/结实率/偏相关分析Key words
Elymus sibiricus/ row spacing/ seed yield/ setting percent/ partial correlation analysis分类
农业科技引用本文复制引用
游明鸿,刘金平,白史且,张新全,李达旭..行距对“川草2号”老芒麦生殖枝及种子产量性状的影响[J].草业学报,2011,20(6):299-304,6.基金项目
国家牧草产业技术体系阿坝综合试验站资助. （）
