种夏季大白菜经济效益相当显著。一般生长期50天的夏白菜,每667平方米可产4500千克,产值3500元以上,是秋季常规白菜收入的2～3倍,现将大白菜夏季抗热栽培关键技术简述如下:一、地块选择大白菜主根粗壮,须根多,叶片肥厚,蒸发量大,对土壤养分要求高,所以要选择地块向阳,便于排灌, The summer Chinese cabbage economic benefits are quite significant. The general growth period of 50 days of summer cabbage, per 667 square meters can produce 4,500 kilograms, the output value of 3,500 yuan or more, is the fall of conventional cabbage 2 to 3 times the income, now cabbage summer heat-resistant cultivation of key technologies are as follows: Landmass selection Chinese cabbage root stout, fibrous root, leaf hypertrophy, evaporation, demanding soil nutrients, so to choose sunny block, easy to irrigation and drainage,