The vegetable heart is also known as the vegetable dish. The flowering and tender leaves of the vegetable heart are edible parts. The quality is crisp, the flavor is good, and the nutrition is rich. The cultivation techniques are as follows:
First, nurture strong seedlings:
1. Variety selection: Select late-maturing varieties of green willow leaves that have strong cold-resistance on the main side and mulch.
2, sowing: in early October selection of greenhouse nursery, preparation of nutritious soil: 1200 kg fertile soil plus 800 kg of decomposed ring fertilizer mixed after adding 3 kg of diammonium mix, tiled in a 20-meter bed for use. Flatten the seedbed, then pour enough water, cover with a thin film, and bake oysters for 3-5 days to increase the temperature. One mu of land with 50g seeds, dry seeds live, after sowing cover fine soil 1cm, smashing a small arch cover film.
3, sub-miao: After the emergence of the seedlings on the removal of a small shed, lower humidity, appropriate exhalation before sub-seedling, strengthen the seedlings low-temperature exercise. About 15 days before seedlings, prepare seedlings for splitting seedlings (methods are the same as for seedbeds). Separate seedlings should be selected on sunny days, and seedlings should be 10 cm squares.
4. Seedling management: The temperature management at the seedling stage should be carried out in sections: the germination period should promote the emergence of seedlings, the daily temperature should be kept at 25-30°C, the night temperature should not be lower than 15°C, the seedling period after emergence, and the daytime temperature Maintain at 20-25 °C, night temperature around 15 °C, gradually reduce the temperature after seedling watering, maintain 15-20 °C during the day, night temperature above 10 °C. 4 to 5 days before planting, the seedbed is poured once per year, and the seedlings and seedlings can be excavated the next day.
Second, planting: should be applied before planting base fertilizer, Mushi high-quality rot ring fertilizer 5000kg, phosphorus potassium fertilizer 30kg, 20-30 days after sowing, true leaf 5-6 tablets can be planted, the density of 1822cm, planting before the shed To increase the temperature.
Third, field management after planting:
1. Water and Fertilizer Management: On the basis of planting water, after 7 to 8 days after planting, the water should be irrigated once again, and cultivating and weeding are also needed to promote the growth of roots. After the seedlings are grown slowly, they must be properly controlled before they emerge from the leaf cluster growth period. In order to enter the formation period and harvest period of the rapeseed, it is necessary to increase the number of waterings to maintain the soil moisture. During the entire growth period of the Chinese cabbage, it is also necessary to top-dress 1-2 times and apply 10~15kg of urea.
2. Temperature management: The production of cabbage in protected areas, temperature management is very important, the seedling period after planting, kept at 20-25°C during the day, 15-20°C during the night, and the leaf cluster growth period before budding is required The temperature is maintained at 18-22°C, and the night temperature is 12-18°C. From the buds to the harvest period, the daily temperature is maintained at 15-20°C and the night temperature is 10-15°C. The production should be based on the temperature requirements of the development of the cabbage, adjust the length of the mat uncovering time and the length of the vent.
4. Harvest: The standard for harvesting the cabbage is to harvest the “Flowerâ€, that is, the height of the calyx is approximately at the same height as the tip of the outer leaf, and the flower bud is about to open.
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