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适时早播,培育壮秧,抢上季节,避过寒露风,是夺取晚稻丰收的关键措施。而晚稻品种感光特性的强弱又是确定播种适期的重要依据。过去,有些地方早播老秧不增产甚至减产,就是因为没有掌握品种感光性,播种。“一刀切”,结果有些感光性较弱的早熟种,如“早中山一号”,出现老秧早花现象,产量不高。相反,有的地方根据“包胎矮”感光性强的特点,早播育老壮秧,获得增产。为了掌握晚稻品种的感光特性,充分
Timely early sowing, nurturing strong seedlings, grab the season, to avoid the cold dew, is to win the harvest of late rice key measures. However, the sensitivity of late rice varieties is an important basis for determining the appropriate sowing date. In the past, in some places, early sowing of old seedlings did not increase production or even reduce production because it did not grasp varieties of light and sow seeds. “One size fits all”, the result of some photosensitive early weed species, such as “early Zhongshan No. 1”, there is the phenomenon of old seedling early flower, yield is not high. On the contrary, in some places, according to the characteristics of “light” of the “covered tire”, the old strong seedling was sowed early and the output was increased. In order to grasp the sensitivities of late rice varieties, full