播期播量对冬小麦品种‘洛麦22’产量形成及主要性状的影响

为了筛选适宜的播期、播量，使良种良法配套，充分发挥该品种的丰产性，通过大田试验，研究了不同播期播量对‘洛麦22’主要性状及产量形成的影响。结果表明：穗数、穗粒数呈现出减少的趋势，随着播量增加，成穗数呈略增加的趋势，对穗粒数和千粒重的影响则较小，籽粒产量最高出现在10月5日这一播期，其产量为8919.0 kg/hm2，播期延迟产量逐渐降低，播量的影响则较小。有效茎蘖数、有效茎蘖率随播期推迟有降低的趋势，说明适期播种有利于提高有效茎蘖数；结实率随播期推迟呈减少趋势，以10月5日播期，播量37.5 kg/hm2和187.5 kg/hm2播期结实性最好，结实率达83.9%和78.2%，可见播量的影响则较小，10月25日播期结实性较10月5日降低17.5%，说明播期越晚结实性越差，故适期播种要比晚播有利于提高结实率。‘洛麦22’适宜播期为10月5日，适宜播量为90~120 kg/hm2。

Effect of Sowing Date, Seed Rate on Yield and Main Characters of ‘Luomai 22’ Winter Wheat Varieties

Through field experiments to study the amount of broadcast sowing ’ Luomai 22 ’ main characters and yield formation.The results showed that：acres of panicles,grain number showing a decreasing trend,sowing were slightly increased acres into a spike upward trend,the number of grains per spike and grain weight of the impact were small,the highest grain yield in for 3,delayed sowing decreased yield,sowing the impact was small.The effective tiller number,effective tiller rate to decrease with delayed sowing the trend showed that,sowing would help improve the effective tillers,seed rate with delayed sowing date tended to decrease with treatment 1 and treatment 3 broadcast the best period of strong,solid rate of 83.9% and 78.2%,for 5 sowing seed set lower than the 17.5% for 1,indicated that the later sowing seed the worse,so sowing than in late sowing would help improve the firm rate.The suitable for sowing period ’ Luomai 22 ’ October 5 th,appropriate seeding rate for 90 kg/hm 2 to 120 kg/hm 2.