Timely seedlings. Thinning is an important measure to control the density and ensure the even and strong seedlings. Generally in the 3-leaf period, the principles of seedlings and thin seedlings are weak between large and weak, mixed with disease, and poor between dense and dense. In the five-leaf stage, seedlings were determined according to the planned density. Weeding. In the seedling stage, weeding and deciduous seedlings can be used for timely weeding and chemical weeding. Drain irrigation in time. According to the water requirements of crop growth and water conservancy, water was irrigated at the bud-leaf stage, flowering stage and green pod stage. The requirement is quick irrigation and quick discharge to reduce lodging. Scientific fertilization. The ratio of rapeseed to nitrogen, phosphorus, and potassium absorption is generally 1: 0.39: 0.95. The combined effect of the three factors is exerted under the combined influence of the cultivation conditions under a certain soil state, water supply, soil, water, and fertilizer effect. 1. Apply foot fertilizer, increase organic fertilizer, farmhouse fertilizer more than 1000 kg, compound fertilizer 3-5 kg ​​as seed fertilizer, urea is not recommended as seed fertilizer. 2. Apply five-leaf fertilizer as early as possible. After the seedlings are set, apply 20-30 kg of urea or 30-40 kg of ammonium carbonate to the water per acre. At this time, fertilization is very important. 3. Skillfully apply manure and pay attention to micro-fertilizer. The manure should be applied at a height of about 10 cm in combination with irrigation at 15-20 kg of urea per mu. Spraying of boron fertilizer and potassium dihydrogen phosphate during flower pod period. Pest and Weed Control. Rapeseed is most susceptible to damage by leaf wasps, beetle and cabbage worms from the emergence to the bolting period. After budding to green pod stage, it was mainly aphids. The main diseases are cruciferous root swollen disease, rape white rust, downy mildew, virus disease, and sclerotinia. In the seedling stage, 1000-1500 times solution of 70% methyltobzine wettable powder is used to control downy mildew, and in the early flowering stage, 500-1000 times solution is used to control sclerotinia sclerotiorum, once every 7 days for 2-3 times in a row. Pieris and aphids can be sprayed with 1500 times liquid of 10% imidacloprid wettable powder. Disclaimer: Some articles on this website are transferred from the Internet. If you have third party legal rights, please inform this website to deal with them. phone Greenhouse Automatic Proportional Pump Fertilizer pump mounted directly on the pipe, the kinetic energy of pipe flow to drives the pump to work at a set ratio to suck high erconcentration drug or quantitative fertilizer in to the pump. After mixed with the water and delivered to downstream. No matter How to change the water pressure, Drug or fertilizer will be mixed and discharged according to a certain proportion. Greenhouse Automatic Proportional Pump,Greenhouse Automatic Drip Irrigation,Greenhouse Automatic Fertilizer Injector JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.alibabagreenhouse.com