在蔬菜育苗期,如果床土不够肥沃,秧苗出现脱肥症状(如茎细、叶小、色淡等),应及时进行追肥。具体要求和做法是:1.追肥时间一般以秧苗出齐、子叶展平后为宜,一天之中,以晴天、上午10～12时为好。2.追肥方法化肥和有机肥均可作追肥施用。追施化肥,应以氮肥为主,用复合肥更好,可以先撒施后浇水,也可以随水浇施,或者将化肥溶解在水中泼施,化肥用量和浇水量的比例掌握在 In the vegetable breeding period, if the bed soil is not fertile, the emergence of symptoms of seedling (such as thin stems, leaves small, pale, etc.) should be promptly topdressing. Specific requirements and practices are: 1. The top dressing time to seedlings generally Qi, cotyledons flattening is appropriate, one day to sunny day, 10 to 12 am as well. 2. Top-dressing methods Fertilizer and organic fertilizer can be used for dressing. Topdressing chemical fertilizers should be nitrogen-based, with compound fertilizer better, you can spread after the first watering, you can also cast with water, or fertilizer dissolved in water, the amount of fertilizer and watering the proportion of master