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How does summer cabbage not contain heart?
Planting Chinese cabbage in summer often leads to issues such as poor head formation and lack of leaf wrapping. This is commonly caused by improper fertilization, inconsistent watering, and serious pest and disease problems. To ensure healthy growth, it's essential to implement comprehensive management strategies that address all these factors.
In terms of fertilization, it's important to apply a balanced mix of phosphorus, potassium, and organic fertilizer while carefully controlling nitrogen levels to avoid excessive vegetative growth. During the early and mid stages of head formation, you can use potassium dihydrogen phosphate and cooked peanut bran. Apply approximately 15-20 grams per plant, either mixed with fresh water or decomposed manure solution.
Water management is also crucial during the summer. The soil should remain consistently moist without being waterlogged. Watering should be done in the early morning and late evening, with about 1-1.5 kg of water per plant each time. To help retain moisture, cover the soil surface with rice straw or other organic mulch, aiming for a layer thickness of 3-5 cm.
Pest and disease control requires regular monitoring of the leaves. If pests or diseases are detected, it's recommended to spray a mixture of 1500 times diluted Farmland Music, 1500 times Daisen Ammonium, or 1500 times L. and 1000 times Killing mixture. For severe cases of soft rot, spraying with 5000 times streptomycin is effective. Regular inspections and timely treatments are key to preventing major losses.
By combining proper fertilization, consistent watering, and effective pest control, summer cabbage cultivation can be significantly improved, leading to better yield and quality.