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棚栽黄瓜盛果期追肥是延长产果时间,夺得高产的物质基础。追肥应根据瓜秧不同长势而定。瓜秧长势繁茂,叶面积大时,一般少追或不追氮肥,应以磷钾肥为主;当瓜秧叶小,蔓细,叶色深绿时,说明磷肥过量而氮肥不足,应以追氮肥为主;当发现叶黄边,叶上有小黄斑点时,说明钾肥不足,可及时补钾。追施氮肥要以尿素和硝
Greenhouses planted cucumber Sheng fruiting time is to extend the fruiting and yielding time, won the material basis of high yield. Dressing should be based on the different growth Guayang may be. When the melon seedling is growing vigorously and the leaf area is large, it is generally less to chase or not chase nitrogen fertilizer, and should be based on phosphorus and potassium fertilizer. When the melon seedling leaf is small and thin, the leaf color is dark green, it indicates that excessive phosphorus fertilizer and insufficient nitrogen fertilizer should catch chase Nitrogen-based; when the edge of the leaves are found, the leaves have small yellow spots, indicating insufficient potassium, potassium can be promptly. Topdress nitrogen to urea and nitrate