Because the planting time is around August, the cabbage grown during this time is called autumn cabbage. Due to the different temperatures in different regions, planting time is also slightly different. The following small series talk about the production technology of autumn cabbage that meets the green food standard. First, seed selection and its treatment (1) Variety selection The high-quality, high-yield, seedling heat-resistant, disease-resistant and suitable varieties cultivated by the Heilongjiang Provincial Crop Variety Approval Committee are selected. The purity is greater than 96%, the clarity is greater than 98%, the germination rate is not less than 85%, and the moisture is not higher than 7%. (2) Selection of seeding Use seeds with good maturity and fullness, 15 days before sowing, and 2 days of drying. Second, the selection of land preparation (1) Site selection Choose land with flat terrain, deep plough layer, high fertility, water retention and fertilizer retention, and good drainage. It is suitable for loam and light clay. (2) Election You can choose corn, corn, sorghum, soybean, early potato, early bean, spinach, onion and garlic. (3) Rotation The cultivation of autumn cabbage should be carried out for more than three years, and it is not heavy or smashed. (4) Site preparation The replanted plots will be flattened from 7 to 10 days before sowing, and the ridges will be 65~70 cm, clamped, crushed, and to be broadcast. The sun-dried plots are flattened as soon as possible, ridged, pinched, cracked, and to be broadcast. Third, fertilization Apply 3-4 tons of high-quality decomposed farmyard manure, 15-20 kg of diammonium phosphate, 5-10 kg of potassium sulfate, and apply 15 cm below the plough layer. Fourth, sowing (1) Sowing date The sowing date is determined specifically according to the growth period of the variety. Regularly planting autumn cabbage in the middle of July. (2) Broadcasting 0.10~0.15 kg per mu. (3) Broadcasting method 8~10 seeds were planted at each hole, and the hole distance was 30~40 cm. After sowing, the soil was gently crushed by 1 cm. (4) Density Depending on the characteristics of the variety, the seedlings are generally 3,500 to 40,000 per acre. V. Field management (1) Miao Ding Miao When the seedlings appeared in two true leaves, the first seedlings were kept, and 4 plants were kept in each hole; when the seedlings were 4~5 leaves, the second seedlings were kept, and 2 plants were kept in each hole; when 8 tablets were fixed, 1 seedling was left in each hole. (2) Irrigation and topdressing 1. Irrigation After each seedling and after the seedling, pour 1 small water; after planting the tree, pour 1 large water; in the rosette period, depending on the soil moisture condition, it is appropriate to carry out hydration, dry and wet alternate, and watering; 7~10 days before the filling period Seedlings are poured after pouring a large amount of water; watering during the balling period; stopping irrigation 7 to 10 days before harvesting. 2, top dressing Into the rosette period for topdressing, 1.7 tons of manure and urine per mu, and 15 kg of biological potassium fertilizer. Spray 0.2% potassium dihydrogen phosphate every 7~10 days for a total of 2~3 times. (3) Management of cultivating The first cultivating in the seedling stage; the second cultivating of the seedlings 6~8 leaves; the third cultivating after the rosette period. (4) Pest control 1. Agricultural control Avoid being adjacent to the cruciferous plot; it can be intercropped with corn crops. 2, physical control Set the frequency-vibration insecticidal lamp to trap the lepidopteran pests. It is trapped by frequency-vibration insecticidal lamp, and it is installed every 3,000 square meters. The distance between the lamps is 180~200 meters, and the height from the ground is 1.5~1.8 meters. It is arranged in a checkerboard pattern. 3, chemical control (1) Pieris rapae Each acre is sprayed with 25% chlorpyrifos No. 3 suspension agent 10~20g spray, and can also be sprayed with 20% diflubenzuron suspension agent 2400~6000 times. (2) Downy mildew Using 72.2% of the mildew water-repellent agent 600-800 times solution, the spray was sprayed once after the fixed seedling and the middle of the rosette; after the central diseased plant was found, the plant was sprayed with 58% of the metalaxyl powder 1000 times. (3) Soft rot Control with 72% agricultural streptomycin 3000~40000 times spray. (4) Viral disease In the early stage of the disease, it was sprayed with 0.15% potassium permanganate solution 500 times or 20% virus A500 solution. Once every 7~10 days, alternate medication, prevention and treatment 3~4 times. Sixth, harvest (1) Harvest period Harvested in mid-October in mid-October. (2) Harvesting standards The listed vegetables should be removed from the yellow rot leaves, no disease spots, insects and clean vegetables listed, the tools used in the harvesting process should be clean, hygienic, non-polluting, the packaging should be neat, firm, breathable, no smell; storage vegetables more than 8% , no disease spots, insects, drying 24 hours after harvest. The above is the production technology of pollution-free autumn cabbage that meets the standards of green food, and I hope to help you. If you want to know more about agricultural technology, please pay attention to the Hui Nong School!
Veterinary Drug Premix,Premix For Animal,Veterinary Premix,Poultry Premix Feed NANYANG CHENGPENG PHARMACEUTICAL CO.,LTD , https://www.chppharm.com
