播期对京科糯2000产量性状的影响

Influence of Sowing Date on Yield Characteristics in Jingke Waxy 2000

以京科糯2000为试验材料,研究在延庆气候条件下9个不同播期对其产量和主要性状的影响。结果表明,5月25日前播种产量差异不显著,6月4日及以后播种的产量差异达极显著水平。同时随着播期推迟生育进程缩短,对糯玉米的果穗性状产生的影响为:果穗变短,穗粗变细,单果重、鲜千粒重、净穗率和出籽率降低,秃顶长度有增加趋势,而每行粒数有减少趋势。延庆地区4月25日为最佳播期,每667m2鲜果穗产量为1 053kg、鲜籽粒产量807.15kg。

The Jingke waxy 2000 corn was investigated for the yield and main characters in 9 different seeding times in Yanqing. The results showed that there was no significant difference among the yields sowed before May 25, but a significant difference was observed sowed in June 4. With the delaying of sowing times, the childbearing process shortened and some impacts were found, including shorter and thinner ear, less on per--fruit weights, fresh grain weights, the net spike rates and seed rates, grains of each line, etc. The best sowing time in Yangqing region was on April 25.