First, the selection of soil for the first time should be selected without three waste pollution, chemical pesticides and heavy metals exceeding the residual soil, and secondly, should choose sunny Gaozao, drainage convenient field. Take a narrow trench deep groove, width 1.2-1.5 meters wide, flat surface. Second, the selected varieties in late March should be selected late varieties of late varieties, early in late March can choose early and mid-maturing varieties, and the varieties of good resistance. Third, scientific fertilization pollution-free production of cabbage Fertilization should be based on decomposed organic fertilizer, Mushi 4000 kg rotted bar fertilizer as a base fertilizer, after the emergence of the election after the sunny 1-2 times cooked dilute manure fertilizer, in the harvest before 7 Day stop manure, change the water or pouring 2% urea solution. Fourth, the prevention and treatment of pests Spring cabbage diseases and pests are generally lighter, sometimes locusts, cabbage, diamondback moth, diamondback moth and soft rot, downy mildew and so on. (1) Pest control measures: removing weeds in the field in time; using silver shade nets to drive floods and killing insect pests; ground inspection, using high-efficiency bt emulsion 1000 times at the initial stage of damage or 1.8% abamectin per 667 square meters (Extermination) 40-50 ml water 30-40 kg, 5% Ruijinte 1500-2000 times and 10% imidacloprid 1500-2000 times and other control. (2) Disease prevention and control measures: Control downy mildew with 72% DuPont Kelu, 25% Suori 600-800 times or 75% Dakenin wettable powder 600-800 times, and use 150 times liquid anti-120 Soft rot. (3) Note: The safety interval is strictly enforced.
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