Cultivation techniques of winter heartworm in greenhouse

The vegetable heart is also known as Guangdong cuisine, and 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. Since the planting of Gaocheng City Agricultural High-tech Park since last year, it has been welcomed by hotels and restaurants. Its cultivation techniques are as follows: First, nurturing strong seedlings: 1. Variety selection: Use late-maturing varieties of Qingliao Yezhe, which has strong cold-resistance and main-side mosses. 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, the field management after planting: 1, water and fertilizer management: based on the colonization of water, 7-8 days after planting and then pouring a sapling water, we need to cultivator weeding to promote root growth, after the seedlings from the cluster growth period Before the emergence of buds should be appropriate water control, enter the formation period and the harvest period, to increase the number of watering to maintain soil moisture, in the whole growing season of the cabbage, but also top dressing 1-2 times, Mushi urea 10~ 15kg. 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. Harvesting: The criterion for harvesting the cabbages is to harvest the “flowers”, that is, the height of the flowers and the tip of the outer leaves are approximately at the same height, and the buds are about to open.

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