近几年来,在大白菜生产期中,全省各地普遍发生了比率较高的干烧心现象。发生干烧心的大白菜,轻的叶缘干枯,生长势减弱,结球不佳,重者坏叶包于球内腐烂,失去食用价值,严重的影响大白菜的产量和品质,如佳木斯市1978年播种24,278亩的大白菜,干烧心的面积就有8,500余亩,占总面积的35％左右,损失量达近千余吨。一、干烧心的类型及其发生规律 In recent years, during the production period of Chinese cabbage, the phenomenon of dry heartburn with a high rate has generally occurred throughout the province. Braised cabbage dry, light leaves edge of dry, weakened growth potential, bad knot, bad bad package in the ball decay, loss of food value, a serious impact on Chinese cabbage yield and quality, such as Jiamusi City 1978 In the year of planting 24,278 mu of Chinese cabbage, there are more than 8,500 mu dry heart area, accounting for about 35% of the total area, with a loss of nearly more than 1,000 tons. First, the type of dry heart and its occurrence