Telephone consultation of a vegetable farmer in Gaoliu Town, Qingzhou City, Shandong Province: I have planted a large arch shed watermelon. Recently, some plants near the roots have yellowing of the edge of the leaves. What is the reason?
Wang Yanyi A: Root dysplasia, insufficient nutrient absorption and frequent changes in recent temperature are the main causes of watermelon yellow leaves. Therefore, the improvement of watermelon yellow leaves has to start from the maintenance of roots and leaves. For plants with yellow leaves, first use the arbor green nutrient mineral fertilizer for fertilizer repair, then use chitin and amino acid rooting agent to properly root the roots, and then spray the amino acid foliar fertilizer, such as 500 times. Photosynthetic power, etc.
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