I. Variety selection
Varieties used for cultivation of cabbages vary according to their cultivation purpose and time of market. In early spring, plastic sheds often use early-maturing varieties, such as Zhonggan 11, Beinaozaosheng, 8398, Primula, Yingchun, Brassica oleracea, Chinese cabbage, and early maturing in Beijing. Middle-maturing varieties such as Jingfeng 1, Zhonggan 8, Qiulan, Qiufeng, Ideal 1, Qingfeng 1, Xiaguang. Late-maturing varieties such as Huagan No. 2, Dongnong 609, Qiufeng, Wanfeng, Hanguang No. 1, Xinfeng Cabbage and Huangmiao Cabbage. Late-maturing varieties are mostly used for summer and autumn cultivation.
Second, the cultivation season
The cabbage in Shenyang was sowed in early February, planted in early April and harvested in early June; summer cabbage was planted in early April and harvested in early August; autumn cabbage was generally sown in early June and harvested in early September.
Third, planting seedlings
1. The preparation of nutritious soil is generally formulated from soil, horse dung, peat, and available fertilizers. Sandy loam is preferred. The proportion is: 60% to 75% of field soil, 15% to 25% of horse dung, and 15% to 25% of bed soil. Add 1 to 1.5 kg of compound fertilizer and mix thoroughly until use.
2. Seed treatment In order to improve the seed germination rate can be soaked in warm water of 50 °C ~ 55 °C for 15 minutes, and then soak in natural cooling for about 3 hours, remove and dry and place under the conditions of 22 °C ~ 24 °C germination, pay attention to maintain humidity, generally 36 hours Sprout, until 80% of the seeds sprout to sow.
3. Seeding method The seedling bed will be leveled and the bottom water will be poured. After the water is soaked, a thin layer of soil shall be sprinkled and then sown. The seeding rate is about 4 grams per square meter, and after planting, the earth is evenly covered with 8 to 10 millimeters. To prevent the onset of blight, 50% carbendazim wettable powder can be used to sterilize the soil, mixing 7 to 10 grams per square meter in the cover soil. Soil temperature in greenhouse nursery can be taken by pouring enough water and then sowing.
4. Seedling management The temperature during the day before emergence is 20°C to 25°C and the nighttime temperature is 13°C to 15°C. After the seedlings emerged, they began to release air, cool and reduce moisture seedlings. The temperature was 12°C to 15°C during the day and 5°C to 8°C during the night. Then the temperature was gradually increased by 15°C to 20°C during the day and 8°C to 10°C during the night. When the seedlings grow to 2 leaves and 1 heart, the seedlings are transplanted. After the seedlings are transplanted, they should be irrigated with water, and the higher temperature should be given. After easing the seedlings, timely ventilation, cooling management, and prevention of leggy. When the seedling stem diameter is more than 0.5 centimeters, it should try to keep the temperature above 15°C so as to avoid passing the vernalization stage. Spring cabbage generally uses Yangchi breeding, seedling period 50 to 70 days. When planting, the temperature of 5 to 10 centimeters is required to be 5°C to 8°C. 5 to 7 days before planting, the seedlings should be subjected to low-temperature training to adapt to external conditions.
IV. Fertilization for soil preparation
The cultivation of cabbage plots should be combined with organic manure in advance of rotary tillage, site preparation or ridging, covering the film. Early-maturing cultivars of early-maturing cultivars were planted with 5,000 to 5,500 cultivars, 4000 to 5000 cultivars at medium and 2000 to 3,000 at late maturity. Use eye drills before transplanting and pour water to plant.
Fifth, fertilizer and water management
After mulching film cultivation in early spring, appropriate watering should be controlled to increase the temperature. If there is cold weather, ammonium sulfate can be applied in advance to 15? 22.5 kg per mu. Irrigation can enhance the cold resistance of the plants. During the rosette period, topdressing is performed once, and N. manure is used for 15 to 20 kg of available N fertilizer. Watering can be appropriately controlled at the end of the rosette, and weeding and weeding can be carried out in time. In the summer and autumn, cabbages are planted in mid-late-maturing varieties or planted in bare land. We must focus on cultivating and weeding, increasing the number of top dressings to control irrigation, and pay attention to drainage after the rain to prevent rot and root ball rot in the field.
VI. Pest Control
1. The soft rot disease focuses on the selection of non-cruciferous crops from previous crops and the application of adequately decomposed farmyard manure. In summer cultivation, sorghum is used to cultivate strong seedlings. Pharmaceu- mic control was carried out by adding water 1000 times to the roots of enemy powder and contaminated with agricultural streptomycin 200 mg/kg.
2. Black rot disease-resistant varieties, a reasonable rotation, clean up the pasture, pest control, reduce wounds, scientific irrigation. Seeds were soaked with 0.5% dexamethasone for 15 minutes before sowing and also soaked in warm water at 50°C for 25 minutes. Before onset and at the beginning of onset, use 60% antihypermycetin or 35% thioredoxin, add 50% omeprazole 1:1 mixture, add water 500 times, or use agricultural streptomycin 200 mg/kg or new plant 200 mg/kg was sprayed for 6 to 7 days, and it was controlled 2 to 3 times. It was also possible to use the agricultural anti-75?1 and Cai Fengning b seed dressing and rooting control.
3. Locusts remove weeds in a timely manner, and the products are promptly cleared of dead leaves after the harvest to eliminate aphids. According to the positive tropism of the aphids to yellow and the negative tendencies to silver gray, yellow plates are used to induce lice or silver ash films are used to avoid maggots. The chemical control can be sprayed with 40% Dimethoate EC or 50% Trichosanthin Emulsion 1000 times, or sprayed with 50% ACV WP 2000 to 3000 times, effective against B. oleracea. Usually 6 to 7 days, even spray 2 3 times.
4. Cabbage caterpillars clean the fallen leaves in the field and plow the soil to avoid continuous cropping or intercropping with the same family of vegetables. Pharmaceutical control can be sprayed with Bacillus thuringiensis 500 to 1000 times, or with 20% cypermethrin EC 2000 to 3000 times spray control, can also be used to control green granules virus.
Seven, harvest
When the leaf ball is basically solid and the outer bulb shines, it is timely harvested. The unbalanced plots were harvested in stages.
Dingmin Pharmaceutical supply Canagliflozin API and Canagliflozin Intermediates with high purity and best price. The main products CAS No are as follows: 842133-18-0, 898566-17-1, 1030825-20-7. Sample can be sent if you request.
Welcome to do business with us. Please email to us directly.
Cas 842133-18-0,Canagliflozin Intermediates,5-Iodo-2-Methylphenyl
Shijiazhuang Dingmin pharmaceutical Sciences Co.,Ltd , https://www.dingminpharma.com