Do not apply cake fertilizer in one piece because the carbon-to-nitrogen ratio of cake fertilizer is small and 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 with human dung and urine for about 3 weeks, and then applied after high temperature fermentation. Do not apply ammonium sulfate and ammonium bicarbonate are physiologically acidic fertilizers, which will increase the acidity of the soil after application and destroy the soil structure. After application of ammonium carbonate, a large amount of ammonia gas is volatilized, which is unfavorable to the growth of vegetables. Do not apply chlorine-containing chemical fertilizers. Chloride ions can reduce the starch and sugar content of vegetables, deteriorate the quality of vegetables, reduce yield, and the residual chloride ions in the soil can cause acidification of the soil and easily cause decalcification of the soil. Don't fertilize vegetables under drought conditions is a crop that likes water. 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, and it 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. Don't apply too much diammonium phosphate. Vegetables require a lot of nitrogen and potassium, and less phosphorus. Even if supplemented with phosphate fertilizer, diammonium phosphate should not be mixed with alkaline fertilizers such as grass ash, so as not to cause ammonia volatilization, which in turn causes ammonia damage. Don't apply potassium fertilizer late in the growth period. Vegetables generally require more potassium fertilizer before and after flowering, and gradually decrease afterwards. 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 and rare earth fertilizer into the soil. Iron ions are easily fixed by the soil and converted into insoluble compounds and lose their fertilizer effect, so iron fertilizer should not be applied to the soil. Iron is not easy to flow on the leaves. Foliar spray should be used. You can use 0.1% to 0.3% ferrous sulfate solution to spray evenly on the vegetable leaves, or use 0.05% to 0.07% rare earth fertilizer solution on the vegetable leaves. 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
Ice cream cone
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