Appropriate cooling after slow seedling, the daytime temperature is 15 °C ~ 20 °C is appropriate, and the seedling water is poured 7 days after the slow seedling, while applying about 10 kg of fertilizer per mu. Then cultivate again and properly seedling. After 15 days, when the rosette leaves have grown and the heart leaves begin to wrap, the leaves are sprayed with vegetables and strong stems, which can make the stems of the plants strong, the leaves are thick, the leaves are fresh, the plants are flourishing, and the natural taste is strong. At the same time, it can improve the ability to resist disasters, reduce the amount of pesticides and fertilizers, and reduce residual toxicity. The compound fertilizer or nitric acid should be applied for 15 to 20 kg, and the fertilizer should be topdressed once during the balling period. The number of watering in winter should not be too much to prevent the ground temperature or humidity from being too high. The water supply during the ball-forming period should be uniform, avoid dry and wet, so as not to crack the ball or open the ball. Watering was stopped 3 days before harvesting.
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