Autumn Chinese Winter Cabbage Field Water and Fertilizer Management

The management of water and fertilizer is an important key to the high yield of Chinese cabbage. When planting Chinese cabbage for autumn and winter, it should be properly managed according to the climatic conditions and the requirements for water and fertilizer of Chinese cabbage at each production stage. First, the seedling period: the roots are underdeveloped, weak absorption, autumn is often high temperature and drought, so it is necessary to supply enough water in a timely manner, adhere to the ground water, promote root growth. When the broken heart is topdressed, each time the seedlings are combined with cultivator, and top dressing is applied to raise seedlings. Second, the rosette period: It is the period when Chinese cabbage grows rapidly. In this period, water and fertilizer management must be strengthened to promote plant growth. After Dingmiao or after plant rejuvenation, should be in the interline or between the strains open hole or small ditch fertilization, per acre topdressing compound fertilizer 20 kilograms or ammonium sulfate 20 kilograms, top dressing after pouring a permeable, after depending on the soil dry and wet conditions for watering . Third, the ball phase: It is the time for the formation of Chinese cabbage products. It requires a large amount of fertilizer and water, water and fertilizer management during the ball stage, and focuses on the beginning and the middle period of the ball-bearing process. That is, the “suction tube fertilizer” and the “heart filling fertilizer”. The second time must use the speed fertilizer, and must be applied in advance, immediately after the start of the center of the dressing, apply 15-20 kg of ammonium sulfate per acre, after the plant pumping cylinder topdressing once again, combined with irrigation after top dressing, irrigation method It is better to use slow water and slow irrigation. Irrigation should be stopped 10 days before harvest to prevent the ball from being too resistant to storage due to excessive water content.

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