玉米种子包衣抗旱早播试验研究

目的]为辽宁地区筛选适宜的包衣强度玉米种子及与之相适应的播期提供依据。方法]对不同包衣强度的玉米种子进行分期播种,观察包衣种子的出苗情况,研究环境条件对其出苗的影响。结果]随着播期的推迟,不同包衣强度的玉米种子发芽出苗的天数减少。不同播期内,不同包衣强度种子的出苗整齐度不同。播期越早,包衣强度对玉米种子出苗期的影响越小。土壤水分和温度对包衣种子的出苗率和出苗整齐度都有一定的影响,尤其是播种到出苗的有效积温对种子出苗的影响较大。播种早的包衣玉米的产量没有受到很大影响。结论]辽宁地区提前播种包膜玉米种子可以保护种子免受初春土壤低温造成的伤害,更好地利用土壤化冻水。

Experimental Research on Drought Resistance and Early Sowing Technology for Maize Seed Coating

Objective] The aim was to supply basis for screening maize seeds with appropriate coating strength and the sowing time that suitable to the seeds.Method] The maize seeds with different coating strength were sowed in different stages to observe their seedling emergence,and the effect of environmental conditions on their emergence was studied.Result] The numbers of days of seedling germination of maize seeds with different coating strength were decreased with the delay of sowing date.The seeds with different coating strength had different emergence uniformity within different sowing date.The earlier the sowing date was,the smaller effect on seeding stage the coating strength had.The soil moisture and temperature had a certain influence on emergence rate and emergence uniformity,especially the effective accumulated temperature had greatly impact on seed emergence from sowing to emergence.The yield of coating maize in earlier sowing was not affected much.Conclusion] The coating maize seeds sowed ahead of schedule in Liaoning region could protect seeds from harming caused by soil low temperature in soil in early spring,and utilize soil defrosting water better.