Main Cultivation Techniques of Chinese Cabbage in Spring
1, thickness and soil preparation. Select neutral soil with deep soil and strong water-retaining capacity so that the soil is finely crushed and there are no roots or rocks, and the ground is flat. 2, timely sowing. Seedlings were raised before and after April 10, and they were transplanted when the seedlings grew to 4 leaves. Direct seeding in late April was appropriate. 3, do bed coating. On the basis of applying sufficient base fertilizer, in order to increase the ground temperature, it is necessary to adopt mulching to promote early maturing. The film bed width is 65cm, the bed distance is 35cm, the bed height is 10cm, and each bed is planted with 2 rows. Mu sprayed surface with 0.15 trifluralin herbicide, and then added 5 kg of urea and 15 kg of diammonium cover film. 4, reasonable sowing. The live cabbage cabbage is placed on the pellicle bed with a row spacing of 40cm, a plant spacing of 50cm, a hole-opening sowing, 3 seeds per hole, and the thickness of the cover soil does not exceed 2cm. After the seedlings are born, the holes must be sealed with soil to prevent burning. After transplanting, seedlings should be planted with soil to seal the holes. 5, top-dressing watering. The management of fertilizer and water is mainly based on promotion, especially the management of early-stage fertilizer and water management. Before the rosette period, due to the mulching film promoting warming, generally do not water, 25 kg of ammonium per acre chase, poor growth potential of vegetables harvesting 15-20 kg of ammonium bicarbonate, according to the weather and soil conditions every 5-7 Watered once a day. 6, control pests. With 5% bactericidal agent, 500-800 times of metalaxyl MnZn, spraying once every 7 days, it can effectively control downy mildew, vitiligo, black spot, and soft rot. Aphid control can be sprayed with 50% to avoid fogging 1000 times or enemy killing 2000 times. Control cabbage caterpillar and diamondback moth can be used 25% fast kill Ling 1500 times or 1% Plutella orange 1000-1500 times. 7, timely harvest. When the knot reaches 80-90%, it enters the harvesting stage. When harvesting, try the cabbage head with hand to slightly soften the best harvest time. The maturity is too large, the head is hard, the cabbage is aging, and the cabbage is Department of yellow fades, lower quality, affecting economic income. The 205 preaching working groups in Kuancheng gave an in-depth presentation in the field.