Prepare before broadcast
1. Variety selection: Select disease resistant varieties, high ridge cultivation.
2. Scientific use of fertilizer: Chinese cabbage requires the greatest amount of nitrogen for growth, followed by potassium, and phosphorus for the least. The absorption ratio of the three major elements is about 4:1:3. The basic rules for nutrient absorption are: Nitrogen is used for the rosette stage. The main, followed by potassium, to the ball stage is dominated by potassium, supplemented by nitrogen, so to apply base fertilizer. Before choosing the plot, the plots of cruciferous vegetables were not planted, and 5000 to 6000 kg of farmyard manure was used in combination with Mushi, and 10 kg of ammonium phosphate was used to make foot mites, which could improve the disease resistance of the plants.
3. Seeding: 1 seed dressing, seed disinfection can effectively control soft rot, black rot. Soft rot: Seeds soaked with 3% potassium permanganate before sowing. The seeds were soaked in cold water for 1 hour, and soaked in the liquid for 30 minutes. The water was rinsed, germination was sowed, or Zhuangfengling was used for seed dressing of 50 grams per mu. Black rot: can be soaked in warm water at 50°C for 20-30 minutes or streptomycin 1000 times for 2 hours, and sown after drying. 2 sowing date: generally 3 to 5 days after the beginning of autumn. Generally, seeds are sown from sowing to sprouting for 24 hours, so they should be sown in the afternoon so that the seedlings can be unearthed in the early evening of the third day after sowing. After a night's growth, they can tolerate a stronger sun.
Field management
1. Seedlings, Miao Miao, timely Dingmiao: From seed germination to Dingmiao, generally about 18 days, should be repeated during the seedlings. The seedlings were unearthed for 3 days and the first seedlings were planted so that there was a gap between the seedlings. When 4 to 5 leaves were used, the second time the seedlings were left, leaving 2 to 3 plants per hole. According to the strength of the seedlings, leaving strength to weak, when the leaves grow to 8 to 9 leaves, according to the spacing of about 50 cm from the planting Dingmiao. The timing of seedlings should be controlled at high temperatures in the noon. Due to the different ability to adapt to the environment, some weak seedlings and diseased seedlings show their morbidity and are easier to identify and eliminate. If there is a shortage of seedlings, it should be replanted promptly.
2. Intertillage and weed control: The combination of thinning and saplings is carried out in the middle of Dingmiao and Rosettes, in accordance with the principle of “Shallow, double, deep, and triple without damaging the rootsâ€. The cultivation of high ridges should follow the principle of “deep sewers and shallow backsâ€. Principles, combined with cultivator ramie soil, such as rosette late growth, can be seedlings.
3. Top-dressing with watering: If there is less amount of base fertilizer, chase the fertilizer once during the seedling period. Mushi urea 10 kg. In the rosette period, the ball beginning and middle period, each chase a fertilizer, Mushi urea 15 ~ 20 kg, combined with spray foliar fertilizer potassium dihydrogen phosphate and urea mixture once every 10 days. Watering should be performed in conjunction with topdressing. The soil in the early stage of the ball is dry and wet, and the soil in the ball stage is moist. Stop watering until 10-15 days before harvest to facilitate storage.
4. Bundles: 10 days before harvest, the outer leaves were lifted and wrapped with wheat straw or straw to prevent the frost damage or mechanical damage before harvest. Late-maturing varieties extend the growing period as much as possible, but must be harvested before frost.
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