冬春茬是日光温室黄瓜的主要茬口之一,生产上常出现死苗现象。是什么原因导致死苗?应采取什么对策呢?肥害一是施用未充分腐熟的肥料,二是施肥浓度过大。对策:有机肥必须经过高温堆沤腐熟,一般夏季需50天以上,冬季需100天以上,可施用酵素菌加快腐熟;在有机肥施用量大的情 Winter and spring stubble is one of the main stubble cucumbers in the greenhouse, the phenomenon of dead seedlings often appear on the production. What causes dead seedlings? What measures should be taken? Fertilizer fat one is not fully applied fertilizers, and second, fertilization concentration is too large. Countermeasures: Organic fertilizer must be high temperature reactor 沤 composting, usually more than 50 days in summer, more than 100 days in winter can be applied enzymes to speed up the decomposed; large amount of organic fertilizer application