Second, apply the base fertilizer, fine soil preparation. The plots of Chinese cabbage cultivated in spring are best tilled in winter. After the thawing of soil in late spring, 5,000 kg per mu are prepared after thawing of the soil. After the ploughing, the ravioli is flattened and the width is 1-1.2 meters, and the length is about 20 meters. It is appropriate.
Third, timely sowing. Usually broadcast from late March to early April. If soil moisture is not good in early spring, water can be made 7-10 days before planting. When sowing, every 2-3 kinds of row, namely spacing 40-50 centimeters, hole spacing 35-40 centimeters, sowing 5-6 seeds per acre, planting 75-100 grams per acre, covering the soil after sowing, increasing the temperature To Miao Qi Miao whole.
Fourth, and time seedlings, reasonable dense planting. Seedlings are sown 4 to 6 days. The seedlings will be broken and film seedlings shall be promptly brought out to expose the cotyledons to the mulch, and the mulching holes shall be compacted with clods so as to prevent pouring seedlings. After the seedlings were broken, three to four true leaves were planted once and five to six true leaves were planted. "Luchun Cabbage No. 1" is about 3,000 per mu, and "Spring and Summer 50" is about 4,000 per shoot.
Fifth, fertilizer and water management. Spring cabbage should be promoted in the end, strengthen fertilizer management, timely cultivator, and promote root development. It requires pouring 1 water every 5 days. During the lotus stage, 20 kg of urea is recovered per mu, 20 kg of potassium sulfate or 25 kg of compound fertilizer per mu.
Sixth, timely prevention of pests, timely harvest. The main disease of Chinese cabbage is downy mildew. During the seedling stage, it is necessary to spray antivirus carbendazim and carbendazim. At the same time in the middle and late attention to spray 1,000 times Dimethoate, 1000-1500 times phoxim against locusts, cabbage caterpillars and so on.
In the middle and late May of the year, the ball of spring cabbage will reach 7-8 percent, which should be harvested in due course. Because the temperature is already high during this period, it is easy to catch convulsions when the harvest is too late. At the same time, the leaf ball that is too tight may be rotted when exposed to high temperatures or rain.
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