近年来我国产稻区由于土壤缺钾及氮、钾不平衡而引起水稻营养失调,导致水稻赤枯病及胡麻叶斑病的发生,而使水稻遭受减产的报道日益增加。广东梅县地区梅江公社相当大部分稻田,近年常在水稻分蘖期以后,脚叶首先出现褐色锈斑,中、后期发展至中部甚至上位叶片。严重的稻株并发芝麻状褐斑,外围有黄色晕圈,由 In recent years, due to the imbalance of potassium deficiency and nitrogen and potassium in the rice-producing areas of our country, rice imbalance is caused, which leads to the occurrence of rice brown spot disease and flax leaf spot, and the reports that rice yield is reduced are increasing day by day. Meixian County, Meixian commune, most of the paddy fields, often in recent years after the tillering stage of rice, the first foot rust brown rust appears, the late development to the central and even upper leaves. Severe rice plants with sesame brown spots, peripheral yellow halo, from