Do not apply ammonium sulphate or ammonium bicarbonate. Ammonium sulphate is a physiologically acidic fertilizer. After application, it will increase the acidity of the soil and destroy the soil structure. After application of ammonium bicarbonate, a large amount of ammonia gas is volatilized, which is detrimental to the growth of vegetables. Do not use chemical fertilizers containing chlorine. Chloride ion can reduce the starch and sugar content of vegetables, deteriorate the quality of vegetables and reduce the yield, and the residual chloride ion in the soil can cause acidification of the soil and easily cause decalcification of the soil. Do not fertilize under drought conditions. Vegetables are water-loving crops. Fertilizing when the soil is dry, not only can the fertilizer effect not be fully exerted, but also the concentration of the soil solution will suddenly increase, which is easy to burn the vegetables. Vegetable fertilization should be combined with irrigation, ditch fertilization, bury the fertilizer strictly and then irrigate, or apply fertilizer along the water. Do not apply more diammonium phosphate. Vegetables require large amounts of nitrogen and potassium, and relatively little phosphorus. Even if supplemented with phosphate fertilizer, diammonium phosphate should not be mixed with alkaline fertilizers such as grass ash to avoid ammonia volatilization and ammonia damage. Do not apply potassium fertilizer late in growth. Vegetables generally require more potassium fertilizer before and after flowering, and then gradually decrease. Moreover, phosphorus is easily absorbed and solidified by the soil and loses its fertilizer effect. Therefore, phosphate fertilizer is suitable as a base fertilizer or concentrated in the soil layer with dense root system in the early stage of vegetables. Do not apply iron fertilizer or rare earth fertilizer into the soil. Iron ions are easily fixed by the soil and converted into insoluble compounds and lose their fertility, so iron fertilizer should not be applied to the soil. Iron is not easy to flow on the leaves, it should be sprayed on the leaf surface, you can use 0.1% ~ 0.3% ferrous sulfate solution to spray evenly on the vegetable leaf surface, or use 0.05% ~ 0.07% rare earth fertilizer solution on the vegetable leaf Spray on the surface, spray 50 to 60 kg of solution per mu. Disclaimer: Some articles of this website are transferred from the Internet. If the legal rights of third parties are involved, please inform this website for processing. phone Coriander And Cumin Powder,Roasted Coriander Powder,Powdered Coriander,Dried Coriander Powder jiangmen city hongsing food co., ltd. , https://www.jmhongsing.com
Pay attention to "Seven Don'ts" when fertilizing greenhouse vegetables
Do not apply cake fertilizer that is not decomposed. Because the carbon-to-nitrogen ratio of cake fertilizer is small and it decomposes quickly, it is easy to produce high temperature and high concentration of ammonia and organic acids locally, and it is easy to burn roots. The cake fertilizer should be broken up, soaked in human feces and urine for about 3 weeks, and then applied after high temperature fermentation.