Non-pollution Cultivation Techniques of Spring Chinese Cabbage
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Spring cabbage is spring cabbage, which is a major vegetable to solve the spring. 1. The sowing date and variety were sowed in batches from early February to late April. Live seedlings or transplants were planted on seedlings (commonly known as chicken feathers or pakchoi) or tender plants. Before the end of March sowing should use late late mature varieties, such as slow in April, etc.; after the end of March sowing, multi-use early maturing and early maturing varieties, such as tall white, white feet, etc., every 666.7 square meters sowing seeds 1.2 ~ 1.5 kilograms, 0.2 to 0.27 hectares (3 to 4 acres) can be planted in Daejeon. 2. Selecting land for planting should firstly select loose soil with no waste pollution, excessive pesticide residues, and toxic heavy metals. Secondly, during the growth of spring cabbage, the middle and lower reaches of the Yangtze River is a season of continuous rain and rain. It is advisable to choose Xiangyang Gaozao and Shuang. In the water field, narrow-neck deep trenches were planted, and the lotus root was 1.5 meters wide and required smooth rice noodles. Dozen rot ash and soil miscellaneous fertilizer, in order to improve water, increase soil temperature. 3. Seeding and planting of spring cabbage, mostly seedlings listed, part of the planting or leaving the "seat" tender plant listed; after sowing with 40% to 50% of decomposed human livestock fecal "foot cover", after depending on the weather and the surface dry and wet conditions decided to pour water. When planting seedlings, seedling age 15 to 25 days, spacing 16 cm, spacing 6 to 10 cm. More intercropping with melons and beans. 4. The cultivating topdressing fertilizer will be rainy in spring and the soil is easy to be built. Drainage should be cleared in time to prevent the water in the earth area and reduce the groundwater level. For transplanting seedlings, we should promptly cultivate and remove weeds in the field. After the spring cabbage is planted, it can directly use 2 to 3% of the concentration of cooked water to “press and stirâ€. After survival, apply manure once every 3 to 4 days. In sunny days, the soil should be dry and the frequency of top dressing must be diligent, and the concentration should be small. After the rain is wet, the number of dressings should be reduced, and the concentration can be appropriately increased. Live seedlings listed on the market, just after the emergence of the election, sunny topdressing 1 to 2 times 2 to 3 mature manure. Attention should be paid to suspending the application of manure water more than 7 days before harvesting, but it should be changed according to the weather and lack of fertilizer, or apply a small amount of urea or ammonium bicarbonate. 5. Cultivation of greenhouses Cabbage can be made between melons and legumes in greenhouses, which can prevent frost or cold, and shorten the growth period, improve the quality of the market.