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近年来,水稻种植面积不断扩大,在一些新开稻田或旱改水田上种植水稻,最容易引起缺锌缩苗症,必须给予重视。水稻缺锌缩苗症一般发生在插秧后2～3周,发病植株矮缩不长,心叶短小,叶枕距缩短,心叶中脉附近失绿白化,心叶以下叶片呈暗绿色,布满不规则的锈斑,基部叶片干枯,根系细弱,抽穗延迟,穗小,不孕小花增加,缺锌严重者不能抽穗。发病后可使水稻每亩减产70～150千克。防治方法主要有:
In recent years, rice planting area continues to expand, in some newly paddy fields or dry paddy fields to grow rice, the most likely to cause zinc deficiency, need to pay attention. Zinc deficiency of rice seedlings generally occurs 2 to 3 weeks after transplanting, the incidence of plant dwarfism is not long, heart leaf short, shortening of the leaf pillow, heart chlorophyll lost green albino near the heart leaves were dark green, full Irregular rust, the base of the leaves dry, thin roots, heading delay, spike small, fertile florets increased, severe zinc deficiency can not be heading. After the onset of rice can be reduced per acre 70 to 150 kg. Prevention methods are: