Planting techniques of Chinese Cabbage in Winter

1. Soil preparation and sowing, reasonable crop rotation, timely removal of previous crop residues, ploughing and tanning as soon as possible, cleaning the countryside, deep ploughing, watering and preserving soil moisture, applying sufficient basic fertilizer (4000kg / mu of high-quality mature organic fertilizer, 25kg of diammonium phosphate, 20kg of potassium chloride); sowing seeds in a timely manner after mixing seeds with new high-fat film, sowing seeds in an appropriate amount when sowing, and raking the topsoil with teeth rake to make the seeds sow into the soil.

2. Seedling stage management, seedling emergence, should be carried out in the cotyledon stage, pull cross stage, 3-leaf stage, seedling replenishment, seedling filling should be timely watering, topdressing (pay attention to nitrogen fertilizer content), to prevent wilting due to the shaking of seedling roots. Timely spraying 800-fold solution of new high-fat membrane can effectively prevent bacterial infection, improve the ability to resist natural disasters, improve the intensity of photosynthesis, and make the seedlings grow healthily.

3. Transplanting and planting, before transplanting, the field should be watered thoroughly, apply sufficient basal fertilizer (1000 kg of rotten pig and cow manure per mu, pay attention to balance of nitrogen, phosphorus and potassium in the soil), transplant in time, plant in a reasonable density, and water immediately after transplanting. And timely spray the new high-fat film 800x solution (effectively prevent the aboveground water from evaporating, the seedling water does not transpirate, shorten the slow seedling period, so that the seedlings can quickly adapt to the new environment). Watering once a day. 3-4 days in a row.

4. field management, after the end of slow seedling stage, timely ploughing and preserving soil moisture, watering and topdressing fertilizer (15-20 kg per mu of compound fertilizer, 15-20 kg of urea per mu in rosette stage, 15-20 kg of urea per mu and 10-15 kg of superphosphate), and spraying 800 times liquid of new high-fat film to improve fertilizer utilization efficiency; spraying Zhuang Stem Ling in the rosette stage of Chinese cabbage can make the plant stem stout, leaf thick, leaf color fresh and tender, plant luxuriant, natural taste strong. At the same time, it can improve the ability to resist disasters, reduce the amount of pesticides and fertilizers, and reduce residual toxicity.

5. disease control: the three major diseases of Chinese cabbage refer to downy mildew, soft rot and virus of Chinese cabbage. The soft rot of Chinese cabbage is commonly known as "rotten pimple" and "rot disease". Streptomycin sulfate or streptomycin sulfate or agricultural streptomycin + new high fat film 800 times solution is sprayed to control the disease; virus disease is mainly transmitted by aphids, as long as aphids are controlled, the disease can be effectively controlled. It can be sprayed with 800-fold solution of aphid lice net and new high-fat membrane. For those who have already contracted the disease and begin to show symptoms, the diseased plants should be removed and destroyed in time, and the source of the disease should be controlled. The healthy strains should be sprayed with 20% virus A500 × 700 times, once every 5 to 7 days for 2 consecutive 3 times. Downy mildew is an airborne disease that requires high humidity for occurrence and transmission. Therefore, the prevention and treatment of the disease focuses on humidity control, removing diseased leaves and central diseased plants at the initial stage of the disease, and spraying with 68% Jinlei, 72% Kelu wettable powder, 52.5% ethyl phosphorus aluminum wettable powder or 40% ethyl phosphorus aluminum wettable powder + 800 times of new high fat film, spray before or at the initial stage of the disease, once every 10 days, 2 times in a row. Liu Yajuan