大白菜干心病表现为心叶尖端、叶缘出现白色干边，严重的病株叶片呈褐色并卷曲、生长缓慢。在发棵期亩追施氧化镁钙、氯化钙等钙肥20—30公斤，可预防此病。发病后，及时喷0‘5％的氯化钙溶液，每亩喷50公斤，每隔3－4天喷一次，速喷3次。钙可防治大白菜干心病@王华水 The performance of Chinese cabbage dry heart tip of the heart leaves, white edge of the edge of the leaves appeared, severe leaves of the plant brown and curly, slow growth. In the hair acre stage acres of magnesium and calcium, calcium and other calcium 20-30 kilograms, can prevent the disease. After the onset of timely spraying 0’5% calcium chloride solution, spraying 50 kilograms per mu, every 3-4 days spray once, spray 3 times. Calcium can prevent cabbage dry heart disease @ Wang Huashui