摘要
从1989年7月5日至7月30日每隔5d为1个大白菜播期进行了试验,结果表明,播期越早,病毒发病率越高,斑点病发病率有随播期推迟而增加的趋势,生长天数相同时大白菜的生长速度以7月15日播种的为最快,到采收时不同播期的单株产量以7月5日播种的为最高,随着播期的推迟而降低,早播者单株重较高是单叶重增加,大叶百分率较高的缘故。小区产量和折合亩产以7月10日播种的为最高。通过讨论认为,在呼市地区大白菜播期可以进一步提早,如结合苗期浇水,85d生育期的大白菜可提早到7月5日到10日播种,这样可使产量进一步提高。
An investigation was conducted on growth and development of chinese cabbage (Brassica campestris ssp. pekinensis Rupr) sown on different times (every five days from the 5th to the 30th, July). The results showed that sown on 5th, July had the highest growth rate, weightper plantat at harvest was the highest weight per plant decreased asthe sowing time delayed. It was Considered that the sowing time of chinese cabbage may be 5 10 days earlier than the time currently practiced in Huhhot area.
