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钙是蔬菜需要量比较大的营养元素之一。蔬菜缺钙不仅产量低,品质劣化,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,生长点稍枯。包心后主要表现在叶片卷曲,球叶边缘出现水渍状,以后变为褐色;芹菜缺钙心叶卷折不伸展、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,上部叶片变黄,果实顶部或侧面产生黑色的圆形病块。
Calcium is one of the more nutritious elements that require vegetables. Calcium deficiency of vegetables is not only low yield, quality deterioration, but also serious disease. According to the survey, the performance of various types of vegetables, calcium deficiency is: cabbage, green edge in front of the package gradually brown, the growth point slightly dry. After the heart of the package is mainly manifested in the leaf curl, the water ball-like edge of the ball-shaped leaves, later turned brown; celery leaf calcium leaf disc roll does not stretch, brown, or even rot; tomato short calcium root, part of the root enlargement to dark brown , Soft drooping stems, dead top buds, the upper leaves turn yellow, the top or side of the fruit produces a black circular disease.