Baoxin vegetables include Chinese cabbage, cabbage, lettuce, broccoli, etc. The common feature is that the feeding organs are mainly vegetative. This type of vegetable is a shallow-rooted vegetable with a shallow root system and should be fertilized in shallow layers. The ratio of nitrogen, phosphorus and potassium is about 1:0.4:1.1-1.3. Fertilization is dominated by organic fertilizer and supplemented by chemical fertilizers. Basal fertilizer is the main ingredient, supplemented by top dressing. 1. The root system of Chinese cabbage is well developed. Planting requires the selection of deep, loose, fertile sandy loam soil or light-soily loam soil cultivation. Chinese cabbage should be applied throughout the entire growth period. One is to apply base fertilizer. Mushi is generally less than 3,000 kg of decomposed organic fertilizer. Bio-organic fertilizer should be applied in combination with organic fertilizer, and the amount of mu is 80-100 kg. The second is planting seedlings and raising seedlings. With 2 kg of microbial inoculum and 5 kg of ammonium sulphate, it is applied to the sowing hole, the ditch and the soil to mix thoroughly before being broadcasted, and then watered to sow. The third is to make up the tree fat at the initial stage. When a small number of plants in the field begin to plant trees, 800-1500 kilograms of manure urine and 10-15 kilograms of black-white bio-fertilizer are applied to the plant. Fertilizer is applied to the small ditch at the edge of the plant and 8-10 cm. The fourth is to chase after application of ball fertilizer. Generally, 15 kilograms of urea are applied to the deep ravine, 10 kilograms of superphosphate and potassium sulfate. 2. Cabbage is easily planted and the soil with fertile soil, convenient irrigation and drainage, and no heavy land is selected. Apply 2 kg of bio-organic fertilizer per square meter of seedbed, and mix the bio-organic fertilizer with seedbed soil, and sow the seedlings for fine soil preparation. Seedling age 30 days, seedlings 4-6 leaves can be planted. Before planting Mushi biological organic fertilizer 80-100 kg, organic fertilizer 4000 kg, ridge single colonization. When planting, mu can be transplanted or rooted after planting with 2 kg of microbial inoculum. Watering after planting seedlings, after the seedlings are resumed, 5 to 10 kg of urea is applied to the cultivating mu, and fertilizer is applied 2 times before and after the lotus sitting period. In combination with watering, the amount of mushi black and white biological fertilizer is 15 to 20 kg. After making the ball, stop the fertilizer management. 3, lettuce, also known as leaf lettuce, shallow roots, fibrous roots developed, the root group is mainly distributed in the earth's surface 20-30 cm in the soil. Before sowing, 2 kg of bio-organic fertilizer was applied per square meter, and mixed with seedbed soil and sowed. Before planting, fertilize the soil and apply 60-80 kg of bio-organic fertilizer to Mushi, and then make a 1-meter-wide sorghum with a 10- to 15-cm height. When planting, mu can be transplanted or rooted after planting with 2 kg of microbial inoculum. After the seedlings are transplanted, they can be topdressed and watered. Lettuce seedlings 5-7 days later, Mu chase bio-organic fertilizer 20 kilograms, top-dressing with water to keep the soil moist. In the initial stage of leaf involution, 0.2% urea and 0.2% potassium dihydrogen phosphate solution were sprayed on the leaves. 4. The growth cycle of broccoli can be divided into five stages: germination stage, seedling stage, lotus siting stage, flower bulb ripening stage and bolting and flowering stage. Cauliflower has a shallow root distribution and requires a large amount of fertilizer. It must be fertile, loose, rich in organic matter, and it must have enough basal fertilizer to retain the loam or clay loam with good fertilizer and water retention properties. In the cultivation process of cauliflower, we must first pay attention to the proportion of N, P and K in the nutrient soil during the nursery period. Before planting, 80-100 kg of bio-organic fertilizer and 2500-5000 kg of organic fertilizer are used as base fertilizer. Lotus sitting on leaf growth and flower bud development stage, mu water with ammonium sulfate 6-8 kg. During the ball stage, generally about 15 kg of ammonium sulphate is used for irrigation, and fertilizer is applied once every 8-10 days until the flower ball grows up.
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