大棚蔬菜对施肥要求很高,假若施肥不当,则不仅会导致土壤板结,引起蔬菜肥害,而且还会影响硝酸盐、亚硝酸盐含量超标。而这两种物质对人体健康有极大的危害。因此,在大棚蔬菜生产上,我们一定要慎施化肥,科学施肥。1.多施有机肥,少施化肥。有机肥料养分含量齐全,肥效持久,施用后 Greenhouse vegetables require high fertilization, if improper fertilization, it will not only lead to soil compaction, causing vegetable fat, but also affect the nitrate, nitrite levels exceeded. And these two substances have a great harm to human health. Therefore, in the greenhouse vegetable production, we must Shen Shi fertilizers, scientific fertilization. 1. More organic fertilizer, less fertilizer. Organic fertilizer nutrient content is complete, lasting fertilizer, after application