前言 在大白菜结球始期,遇到过于潮湿或过于干旱的月份经常发生于心病。叶球心叶边缘组织坏死是其主要特征。内部发生褐变或黑变能导致第二次侵染而使内部组织坏死,尽管外观正常,整棵白菜再不能作为商品。 ”本试验报告指出了钙和硼的含量对干心病的影响,以及钙和硼在白菜叶球 Preface In the early stage of Chinese cabbage knotting, encountered too wet or too dry months often occur in heart disease. Myocardial necrosis of the leaf lobe edge is its main feature. Internal browning or blackening can lead to the second infection and necrosis of the internal tissue, although the appearance of normal, the whole cabbage can not be as a commodity. "This test report pointed out that the calcium and boron content of dry heart disease, and calcium and boron in cabbage leaf ball