First, fertilizer and water management 1, scientific use of fertilizer: cabbage cabbage leaf vegetables, the greatest demand for nitrogen in the growth, potassium followed, the need for phosphorus, the absorption ratio of the three elements is about 4:1:3, the basic law of nutrient absorption is : Before the rosette stage, nitrogen dominated, followed by potassium, and during the ball stage, potassium dominated and nitrogen supplemented. The first is to apply basal fertilizer: it can be defined in ordinary pig and calf manure varieties, but in order to increase the content of effective elements in organic manure, 30% or so of chicken manure or sheep manure can be added as a supplement. Sexual application, with the site to turn in, due to the cabbage cabbage is particularly developed, so the relative fixation of certain nutrients such as phosphorus does not affect the absorption and utilization of Chinese cabbage. The second is to timely fertilizer: If the base fertilizer is sufficient, or after the application of a set of organic fertilizer, the top dressing frequency can be determined as 2 times. For the first time in the rosette stage, 10 kg of urea or 22 kg of ammonium sulfate was applied per acre. The second topdressing should be carried out before the ball-bearing process. Due to cabbage ridge closure, it is not possible to carry out operations such as spraying, so it can be flushed with water. The dosage should be twice that of the previous one. 2, water management: Chinese cabbage from the group to the rosette period, the temperature is declining, the weather is mild, here can be properly watered, the end of the rosette can be appropriate to control the water for several days, to the third top dressing and then watering. After the Chinese cabbage enters the ball stage, the maximum amount of water is needed. Therefore, once the seedlings are finished, they must be poured once. Then the second water is poured every 2-3 days. This time it is very important. At this time, if the soil is cracked, the lateral roots will break and the fine roots will die, affecting the knot. Afterwards, water is usually poured 5-6 days to keep the soil moist. Second, pest control For the pests and diseases of Chinese cabbage, the principle of “giving priority to prevention, taking precautions and taking into account†should be adhered to. The first is the selection of high-resistance varieties. The second is to implement a reasonable rotation. Third, it is also necessary to apply a proper amount of chemical drugs. The specific drug species can be determined according to the type of disease and insects. Control methods: (1) The use of plant ash in the rhizosphere of Chinese cabbage can inhibit the development of root pods. (2) The Chinese cabbage is mixed with plant ash, lime and 2.5% trichlorfon powder when it grows to 6-8 leaves. It is applied around the vegetable root to prevent egg flies from laying and kill larvae before the soil is infiltrated. The ratio of medicine preparation is 2:1: 1. (3) When a root pod was found in the field, immediately irrigate the root with 90% crystal trichlorfon 600-800 times to kill the larvae. The seedling stage focuses on the prevention of aphids, concurrent treatment of rapeseed meal, cabbage caterpillar, and diamondback moth, and spraying of dimethoate or cypermethrin pesticides every 5 days. The rosette stage mainly controls downy mildew, spraying once every 7-10 days from mid-September to mid-October, 3-4 times in succession, with 40% EDP 300-400 times, or one strain of Rhizoctonia. Add 800 to 1000 times of the mixture of Gardixen Zinc. Medical Hand Washing Sink,Hospital Surgical Scrubbing Sink,Hospital Scrubbing Station,Hospital Wash Sink Taizhou Gaogang District Dixin Medical Equipment Co., Ltd. , https://www.dixinmedical.com