【摘要】 多花黑麦草幼穗分化进程对穗部性状和种子产量有显著影响。幼穗分化的天数与每穗种子粒数是极显著正相关。播种愈早，幼穗分化天数愈多，种子产量愈高。南京地区留种的多花黑麦草的最佳播期8月20日19月10日。二棱期是多花黑麦草通过春化阶段的形态标志，也是幼穗能否分化完全的转折点。单棱至护颖分化期是影响种子粒数最关键的时期。更多还原

【Abstract】 The spike differentiation process of Lolium multiflorum had remarkable influence on some characters of spike and seed yield. There was a significantly positive relationship beween days of ear differentiation and the grain number per spike. The earlier the sowing date, the more the days of spike differentiation, the higher the seed yield.The best sowing date in Naming was from 20, August to 10, Semptember. The double ridge was a morphological mark Lolium multiflorum had passed vernalization. The duration from single ridge to glume differentiation was the best important phase that affected the grain number per spike.更多还原