蔬菜冬春棚室育苗常见的生理障碍有以下十种。兹将其外部表现、发生原因和预防、补救措施,介绍如下: 1.徒长苗 外部表现为叶片肥大,色淡而薄,节间疏,茎细长,根系少。发生原因是氮素偏高、水分充足、温度偏高、密度较大、光照不够等。可采取合理肥水,适温管理,及时间苗, Vegetable winter spring nursery greenhouse common physiological disorders have the following ten. The external manifestations, causes and prevention and remedial measures are described as follows: 1. External growth of the trunk is leaf hypertrophy, pale and thin, sparse internodes, stems slender, few roots. The reason is high nitrogen, adequate water, high temperature, high density, light is not enough and so on. Can take a reasonable fertilizer, suitable temperature management, and time seedlings,