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上海地区大白菜的营养生长期(8~12月)总的农业气候条件是适宜的。但在三个关键生育期,由于光、温、水的年际变化大,给大白菜的高产稳产带来不利影响。(一)播种到出苗期,一次降雨60.0毫米以上不利齐苗
The overall agro-climatic conditions of Chinese cabbage in Shanghai during the vegetative growth period (August-December) are suitable. However, in the three key growth period, due to the large interannual variation of light, temperature and water, it will adversely affect the high and stable yield of Chinese cabbage. (A) sowing to the seedling stage, a rainfall of 60.0 mm or more adverse Qi Miao