When cultivating optional varieties of Anhui April Green, Hangzhou Silkworm Cabbage, and Nanjing April White, it's important to follow proper agricultural techniques for optimal growth and yield. There are two main sowing methods: direct seeding and seedling transplanting.
The first method is direct seeding. Before planting, apply 4 to 5 tons of well-decomposed organic fertilizer per mu (approximately 667 square meters) and plow the field to ensure a flat surface. Create furrows and sow seeds with a row spacing of 20 cm. After the seedlings emerge, perform thinning twice. When the plants have 4 to 5 true leaves, perform final thinning, leaving a spacing of 15 to 20 cm between each plant. The recommended seed rate is 0.5 to 0.8 kg per mu.
The second method involves raising seedlings. Choose loose and fertile soil for the seedbed. Apply 1.5 to 2.0 tons of organic fertilizer per acre as base fertilizer. Sow 1.5 to 2.0 kg of seeds per mu, which can be transplanted over an area of 5 to 8 acres. Water the seeds immediately after sowing or gently step on the soil to firm it. Thin the seedlings two to three times after they emerge to promote healthy growth.
Fertilizer management is crucial before harvest. Apply urea as a top dressing 1 to 2 times, typically using 5 to 10 kg of urea per mu. Stop applying additional fertilizers at least 10 days before harvesting. Watering should be done in conjunction with fertilization. Immediately water the field after planting to ensure good moisture levels for the young plants.
Pest control is essential for maintaining crop health. Aphids can be controlled by spraying 40% Dimethoate EC diluted at 1000 to 2000 times, or 5% Malathion. If possible, use insect nets with a mesh size of 25 or more for full coverage to prevent pest infestation.
Harvesting can begin when the seedlings have 4 to 5 leaves and continue until the plants reach maturity. Timely harvesting ensures better quality and higher market value. Always check the crop regularly to determine the best time for picking based on the specific variety being grown.
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