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Autumn cabbage August clever management
When autumn cabbage starts to form a cross, the seedlings are sown, and three plants are kept each time. As the seedlings grow to 4-5 leaves, a second thinning is performed, leaving two per hole. The seedlings are then planted in groups, with one plant left in each hole. It is important to keep strong, healthy, uniform, and vigorous seedlings, while removing weak or small ones. During this process, five key principles should be followed: keep small seedlings to let the large ones grow, keep only the healthy ones, maintain purity, ensure quality, and avoid weak or diseased plants.
To achieve optimal growth, three types of soil cultivation should be carried out: light hoeing, deep digging, and combining both techniques. This helps eliminate weeds, loosen the soil, regulate temperature, prevent drought, and promote strong root development and early seedling growth. The principle for digging is shallow, deep, and shallow—starting shallow, going deep in the middle, and ending shallow again to avoid damaging the roots.
After the first thinning, the first topdressing is applied, known as seedling fertilizer. Once the plant enters the rosette stage, it’s essential to promote the growth of rosette leaves, which lays the foundation for nutrient accumulation during the ball stage. At this point, additional manure should be applied, such as fermented human urine, superphosphate, wood ash, or potassium phosphosulfate. Before the head forms, a final fertilizer application is made, using organic or microbial fertilizers for eco-friendly vegetables. Chemical fertilizers should be avoided for organic produce.
Pest and disease control is crucial. Focus on preventing diseases like downy mildew, soft rot, and blight. Choose safe, low-toxicity, and residue-free pesticides, and spray a diluted solution of new high-fat film (400 times) to protect seedlings. This helps prevent diseases, repel pests, block contamination, reduce pesticide residues, enhance color, improve quality, and produce clean, marketable vegetables. Prevention is the main approach, followed by timely treatment. Early detection and minor issues should be addressed before they escalate. Biological and agricultural methods are preferred to minimize losses and ensure sustainable farming. (Source: China Plant Protection Network, Wei Linfei)