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答:水稻缺锌症状出现在插秧后两周到一个月,最初在植株下部叶片上沿主脉出现失绿条纹,叶片上出现棕色锈状斑点,呈圆形或卵圆形,大小约1～3毫米,严重时形成棕色条纹。随后,新抽出叶片基部失绿褪色,继而全叶失绿褪色,上部叶片变窄,中部叶片又出现棕色斑点,逐渐形成棕色条纹,最后焦枯。大田中成撮状枯死。水稻缺锌,植株矮小,分蘖降低,根系短小,生长成熟延迟,严重影响水稻的产量。
A: The symptom of zinc deficiency in rice occurs two weeks to one month after transplanting. Initially, greenish stripe appears along the main vein on the lower leaves of the plants, and brown rusty spots appear on the leaves, which are round or oval with the size of about 1 to 3 Mm, serious brown stripes formed. Subsequently, the base of the newly drawn leaves lost its green color and fades, and then the whole leaves became chlorotic and discolored. The upper leaves became narrower, the middle leaves appeared brown spots, and gradually formed brown stripes and finally became scorched. Daejeon Zhongcheng pinch dead. Zinc deficiency in rice, short plants, reduced tillers, short roots, delayed growth and development, seriously affected the yield of rice.