播种期与播种量对多花黑麦草种子生产性能的影响

研究了不同播种期和不同播种量对多花黑麦草种子生产性能的影响。结果表明,不同播种期对全生育期影响较大,但对种子的成熟期影响较小,早播可适当提前种子收获;相同播种量条件下,随着播种期的延迟,种子千粒重呈下降趋势;同一播种期内不同播种量处理之间,种子千粒重存在显著（P〈0.05）和极显著差异（P〈0.01）;不同的播种时期应适当调整播种量,长江中下游地区10月10日左右播种适宜的播种量为1.0g/m^2,10月25日左右播种适宜的播种量为1.5g/m^2。

Effect of Sowing Rate and Sowing Date on the Seed Productivity of Lolium multiflorum

Effect of sowing rate and sowing date on the seed productivity of Lolium multiflorum was studied. The results indicated that different sowing date significantly affected the whole growth period of annual Ryegrass, but they affected the mature time slightly. Early sowing can be harvested a little earlier. The thousand-seed weight decreased with postponing the sowing date at the same sowing rate. There is significant difference or very significant difference between thousand-seed weight at different sowing rate under the same sowing date. In order to reach high seed yield, it is necessary to adjust sowing rate according to sowing time. It is recommend that the sowing rate, 1.0g/m^2 , is suitable for planting in about Oct. 10, and 1.5g/m^2 in Oct. 25 or afterwards in the middle and lower reach regions of Yangtze River.