2. Before fertilizing the soil preparation and soil preparation, 5000 kg of good-quality ring fertilizer should be applied per acre.
Third, the cultivation of strong seedlings sowed in mid-February, about 100 grams per mu. After the seeds are treated with warm water or chemicals, they are sown in a 1010 cm nutrient bowl and cover soil 0.5 cm. The seedling stage is dominated by heat preservation, which is 25-28°C during the day before excavation and 20°C during the night; 20°C during the day and 12°C during the night. Seedling age 40 to 45 days, when six or seven leaves when planting. Ten days before planting, the seedlings were grown at low temperature.
Fourth, timely planting in late March when planting Mushi fully cooked chicken manure 4 cubic meters, 25 kg of ammonium phosphate or ternary compound fertilizer 30 kilograms, according to 60 cm wide high ridge, ridge height 10 cm. The density of planting is 3560 cm. In late March, the weather is hot and cold. In case of cold current sheds, we need to enclose the grass weir. The shed is covered with a small arch shed so that the minimum temperature below 8°C in the shed is no more than 4 days to prevent bolting and flowering.
Fifth, strengthen the management of the seedling stage basically do not let go of the wind, closing the shed warming to promote the slow seedlings. After entering April, it is 25-28°C during the day and 15-18°C during the night. After the Chinese cabbage has started to catch the ball, it is released once a day during the day. Water and fertilizer management, from planting to harvesting, can be used for four or five times of water, and watering before mulching. After 10 days of planting, the water was irrigated once a day for 10 times, and 15 kg of urea was harvested with water. Into the filling period, 25 kg of special fertilizer for Mushi cabbage was used.
VI. Pest control The major disease of Chinese cabbage is downy mildew, and the seedlings are sprayed with antivirus carbendazim and carbendazim. After the rosette period, thiophanate-methyl and other fungicides were sprayed to prevent downy mildew; in the middle and late stage, attention was paid to spraying imidacloprid 1,000 times or other agents to control aphids.
7. The timely harvesting of Chinese cabbage varieties suitable for planting in protected areas is mostly not heat-resistant, and timely harvesting is needed to prevent rotten hearts. After 50 days of planting, the Chinese cabbage cabbages began to be firm, and they could be harvested when they were six or seven percent old.
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