Summer cabbage does not contain heart, need comprehensive prevention and control: First, it is necessary to rationally apply fertilizer: In Chinese cabbage, it is necessary to pay attention to increasing phosphorus and potassium fertilizers and organic fertilizers, and to control nitrogen fertilizers so as to restrain their growth. Generally, in the early stage of ball-bearing and the mid-balloon stage, a three-component compound fertilizer should be applied. Each time, the application rate should be 10 to 15 kilograms per acre, and the water should be flushed with water. Second, to be scientifically watered: In Chinese cabbage, it is necessary to maintain a uniform and adequate supply of water, and it is advisable to keep it from time to time to prevent it from becoming wet when dry and to keep the soil moist. Pour water once and remember not to water at noon. Third, we must promptly prevent and control pests and diseases: during the cabbage Chinese cabbage, the attention should be paid to the regular inspection of the leaves, and if there is a downy mildew, soft rot and other hazards, it is necessary to use 40% aluminum phosphate wettable powder 200 at the beginning of the disease. ~ 300 times the liquid, 50% of methosulfurin 500 ~ 600 times, or 50% of a metope copper wettable powder 600 ~ 800 times liquid, spray 7 to 8 days, continuous control of 2 to 3 times can be. Fourth, to spray foliar fertilizer in a timely manner: In Chinese cabbage, during the ball filling period, an 800-fold vegetable-specific organic humic acid active liquid fertilizer, or 0.3% urea and 0.3% can be sprayed on the leaves every 7-10 days. % of potassium dihydrogen phosphate mixture, even spray 2 to 3 times, uniformly spray wet leaves, can effectively promote the cabbage's heart. Instrument Sample Cups,Ral Sample Cup,Ral Instrument Sample Cup,Ral Instrument Sample Container Yancheng Rongtai Labware Co.,Ltd , https://www.rongtailab.com