Planting technique of Chinese cabbage head

First of all, the cultivation of green vegetables should choose the land which is rich in organic matter, loose and fertile. After selecting the land, it is necessary to prepare the land, apply basic fertilizer, open ditches and open boxes. After the plots have been sorted out, they will choose the right time to sow seeds, usually sowing in late August, and transplanting when the seedlings grow 5 Mel 6 leaves. After transplanting, we can do a good job of fertilization, irrigation, drainage, mid-ploughing, weeding, prevention and control of diseases and insect pests.

1. Soil: select the land rich in organic matter, loose and fertile for planting. Before planting, the land should be ploughed and leveled, and organic fertilizer should be applied as base fertilizer, and appropriate amount of phosphorus and potassium fertilizer should be applied at the same time. Then, according to the humidity of the field and the quality of the soil, the general width of the box is 1.5 meters, the width of the ditch is 20 mi 25 cm, and the depth of the ditch is 15 mi 18 cm.

2. Sowing: generally sowing in late August, the seeds are sown evenly on the side of the box, and after sowing, they are covered with plant ash and wait for seedling emergence. Generally, the seedling stage is 35 ml for 40 days, and when the seedling grows 5 Mel 6 leaves, it can be transplanted. It is better to transplant in cloudy or sunny evening. If the seedling bed is relatively dry, spray water evenly the day before transplanting, and then transplant with a row spacing of 24 cm and a nest spacing of 10 cm.

3. Fertilization: 1 light human and animal manure water should be applied once every 2 days after transplanting; during the growth period, in addition to basal fertilizer, 3 times topdressing should be applied, more organic fertilizer and phosphorus and potassium fertilizer should be applied to control the amount of urea. During the period of fertilization, we should do a good job of ploughing and loosening the soil and weeding.

4. Irrigation: if there is dry and little rain weather, furrow irrigation can be used; if it rains, the box ditch should be cleared in time to prevent stagnant water in the field.

5. Pest control: diseases and insect pests such as virus disease, black spot, white rust and aphids are easy to occur. Ningnanmycin, Chlorothalonil, acetamiprid and other agents can be selected for prevention and control, and can be sprayed with water in strict accordance with the instructions for the use of the drug.