蔬菜缺钙不仅产量低，而且病害严重。据调查，各类蔬菜缺钙的表现是，甘蓝，在包心前绿叶边缘逐渐变褐色，包心后表现在叶片卷曲，球叶边缘出现水渍状，以后变成褐色；芹菜缺钙心叶卷折不伸展，呈褐色甚至腐烂；番茄缺钙根短，部分幼根膨大为深褐色，茎软下垂，顶芽枯死，上部 Calcium is not only low yield vegetables, but also serious disease. According to the survey, the performance of various types of vegetables calcium deficiency is that cabbage, in front of the green leaf edge gradually brown, wrapped in the performance of the leaves after curling, water-like ball edge edge of the ball, later turned brown; celery calcium deficiency heart Roll does not stretch, was brown or even rotten; tomato calcium short root, part of the root enlargement to dark brown, soft drooping stem, the top bud withered, the upper part