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How does summer cabbage not contain heart?
Planting Chinese cabbage in summer often leads to problems such as poor head formation and lack of leaf wrapping. This issue is commonly caused by improper fertilization, inconsistent watering, and serious pest and disease infestations. To ensure healthy growth, it's essential to implement comprehensive management strategies that address these challenges effectively.
In summer, proper fertilization plays a key role in promoting good head development. It is recommended to apply phosphorus and potassium fertilizers along with organic matter, while carefully controlling nitrogen levels to avoid excessive vegetative growth. During the early and mid-stage of head formation, you can use a mixture of potassium dihydrogen phosphate and cooked peanut bran. Apply approximately 15–20 grams per plant, either diluted in fresh water or decomposed manure solution.
Water management is equally important during the summer cabbage growing season. Ensure consistent and even watering to maintain optimal soil moisture. Avoid overwatering or allowing the soil to dry out completely. Watering should be done in the early morning and late evening, with about 1–1.5 kg of water per plant each time. Additionally, mulching the soil surface with rice straw or other weeds, at a thickness of 3–5 cm, helps retain moisture and reduce evaporation.
Pest and disease control is crucial during the summer season. Regularly inspect the leaves for signs of damage or infestation. For prevention and treatment, spray 1500 times diluted solutions of Farmland Music, Daisen Ammonium, or L. and 1000 times diluted insecticide mixture. If soft rot becomes a major problem, apply streptomycin at a dilution of 5000 times. Timely intervention can significantly reduce losses and improve overall crop quality.
By following these practices—balanced fertilization, proper irrigation, and effective pest control—farmers can greatly enhance the success of summer cabbage cultivation and achieve better yields.