Early defense Chinese cabbage does not contain heart
In the course of planting Chinese cabbage, there is often a phenomenon of unintentional or untrue, resulting in a decline in the yield and quality of Chinese cabbage, and the economic benefits are impaired. The vegetable farmers must be reminded to prevent and treat it as soon as possible. First, the reason why Chinese cabbage is not wrapped or misconcentrated 1. Variety reasons. Some counterfeit and inferior seeds, or spring cabbage summer seeds, summer cabbage autumn seeds, etc., can also cause the occurrence of uninvolved or non-implemented images. 2. Improper management of fertilizer and water. Chinese cabbage has a large amount of growth, rapid growth, and a large amount of fertilizer. Therefore, sufficient water and fertilizer supply is the key to high yields. However, if blindly topdressing and watering are used to obtain high yields, especially in the fertilizing process, partial application of nitrogenous fertilizers, without paying attention to the application of phosphorus, potash fertilizers, and organic fertilizers, it is easy to cause the Chinese cabbage to grow in length and the leaves are large and scattered, leading to unintentional entrapment. Or don't believe it. 3. Disease and insect damage. In the course of growing Chinese cabbage, if it is harmed by pests and diseases, such as downy mildew, virus disease, soft rot, powdery mildew, aphids, cabbage caterpillars, etc., it will lead to vegetative malnutrition of Chinese cabbage, sometimes there will be no heart or The heart is not true. 4. Herbicide damage. During the chemical weeding process of Chinese cabbage, if the liquid preparation or improper operation, it will also cause harm to the growth of Chinese cabbage and affect the Chinese cabbage. Second, preventive measures 1. Scientific fertilization. Generally in the regimental period, the initial stage of the ball, the mid-balloon stage, each topdressing stage is once fat. When fertilizing, pay attention to the combination of nitrogen, phosphorus, and potassium to prevent blindly increasing nitrogen fertilizer and cause cabbage to be long. Can also be in the ball stage, with 0.1% -0.2% potassium dihydrogen phosphate solution foliar spray, spray every 7-10 days, and even spray three times. 2. Reasonably water. Cabbage can be properly watered from the saplings to the rosette stage, and the watering of the rosettes can be properly controlled during the later period to promote leaf hypertrophy and root development. After the seedlings are over, they are poured once in the early stage of the ball with a "ball-fertilizer". Then pour water every 5-6 days to keep the soil moist. 3. Prevent pests and diseases as soon as possible. Once the onset of disease prevention. Downy mildew can be sprayed with 75% chlorothalonil wettable powder 500 times or 72% cream urea manganese zinc wettable powder 800-1000 times. Soft rot and black rot start from the rosette stage and are sprayed with 3000-4000 times of streptomycin for agriculture or 4000 times for neomycin. Aphids were sprayed with 10% imidacloprid wettable powder 1500 times. Pieris rapae and Plutella xylostella were treated with sex attractants or sprayed with 500 times liquid of vegetable extract. The above agents are sprayed once every 7-10 days and sprayed 2-3 times. 4. Rational use of herbicides. The best combination of cultivator for manual weeding, to grasp the "head shallow, second deep, three ridges do not hurt the root" principle. If chemical weeding is used, we must choose suitable herbicides, and strictly follow the product instructions to dispense and spray pesticides. The concentration of the control solution is too high and the repeated spraying will cause injury to Chinese cabbage. LED HIGH BAY LIGHT,UFO HIGH BAY LIGHT,warehouse lighting,WORKSHOPP LIGHT,INDUSTRIAL LOW BAY LIGHT Guangzhou Zhongzhinan Supply Chain Co.,Ltd. , https://www.gzzhongzhinan.com
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