Vehicle Mounted Thermal Camera Vehicle Mounted Thermal Camera,Thermal Ip Camera,Thermal Camera Surveillance,Vehicle Mounted Camera Hope Wish Photoelectronic Technology Co., Ltd , https://www.irhpws.com
High-yielding Cultivation Techniques of Spring Cabbage
Spring cabbage is known for its strong adaptability, easy cultivation, and early market availability, making it a key crop in the supply of vegetables during early spring. To achieve early maturity and high yield, farmers should implement arch cover techniques and focus on specific cultivation methods.
First, choosing the right variety is crucial. Opt for cold-resistant, tightly packed, high-quality varieties that are less prone to bolting and suitable for early planting and dense cultivation. Varieties such as "China Gan 11," "Lugan 1," and "Zhong Gan 12" are highly recommended.
Second, cultivating strong seedlings is essential. The sowing date must be carefully determined because spring cabbage is a vernalization crop. If seeds are sown too early, the plants may bolt prematurely due to exposure to low temperatures. Typically, seedlings are raised in a greenhouse or under a solar cover from mid-December to early January.
Before sowing, prepare the seedbed by adding well-decomposed manure or compost and sterilizing the soil with carbendazim. Select high-quality seeds and soak them in warm water (18°C) for two hours, then keep them at 15–18°C to promote germination. Sow the seeds in a prepared bed, covering them with 1 cm of soil. The seeding rate should be around 4 grams per square meter, with a total seedbed area of about 5 square meters per 667 square meters.
After the seedlings emerge, maintain daytime temperatures between 20–25°C and nighttime temperatures between 10–16°C. Once the seedlings have five true leaves, ensure temperatures do not drop below 10°C to avoid premature bolting. About eight days before transplanting, gradually increase ventilation to harden off the seedlings.
Third, prepare the soil thoroughly and install the shed early. Choose fertile, slightly acidic or neutral soil near a water source. Apply 5,000 to 7,500 kg of decomposed manure per 667 square meters, till the soil to a depth of 20 cm, and create ridges 1m or 1.5m wide. Cover the ground with a shed 25 days before planting.
Fourth, plant densely after the last frost when the soil temperature stabilizes above 5°C. Ensure the temperature before planting does not fall below 9°C. Use plastic film covers and plant on sunny mornings between late February and early March. Be careful when transplanting to protect the roots. Water the soil before planting, and after the water is absorbed, cover the soil. Alternatively, dig trenches, place the seedlings, and water them. Plant approximately 5,000 to 6,000 plants per 667 square meters.
Fifth, manage the field effectively. After planting, focus on temperature control. During the first 7–10 days, avoid ventilation and maintain greenhouse temperatures at 25–27°C during the day and 11–15°C at night. Once the seedlings are acclimated, gradually lower the temperature to 20–25°C during the day and 12–14°C at night. When temperatures inside the shed exceed 20°C, ventilate. Remove the inner sheds once the minimum temperature remains above 10°C.
Water and fertilizer management is also important. Fertilize 15 days after planting with 15 kg of ammonium sulfate per 667 square meters. After controlling the water, apply a second topdressing with 30 kg of diammonium phosphate per 667 square meters or 800 kg of diluted manure compost. Water every seven days, but stop watering a few days before harvest to make transportation easier.
Finally, harvesting should be done promptly to meet the morning market demand. Harvest when the heads are fully formed, usually once every 3–4 days, and then again 1–2 days later. This ensures a continuous supply of fresh, high-quality spring cabbage.
Next Article
Spring cabbage violet pest control technology