Long compound fertilizer efficiency, should do the base fertilizer. The compounded fertilizer after processing and granulation is slower than the powdered fertilizer, and it is not easy to be degraded and volatilized, and the fertilizer effect lasts for a long time. It is easy to use as a base fertilizer, and the general mu dosage is 30-40 kg. Compound fertilizers should not be used for seedling fertilizers and mid-to-late-stage fertilizers in order to avoid rushing green crops. Pay attention to use with simple nitrogen fertilizer. The amount of nitrogen fertilizer is less at the seedling stage of the crop. Therefore, for the crop that uses compound fertilizer as the base fertilizer at the time of sowing, the available nitrogen fertilizer should be added in time for topdressing according to the fertilizer requirement law of different crops to meet the nutritional needs of the crop. Be careful to choose the right concentration. Most compound fertilizers are formulated according to the average soil nutrient status of a certain area and the proportion of large crops required fertilizer. There are high-, medium-, and low-concentration series fertilizers on the market. Generally, low-level total nutrients are between 25% and 30%, medium concentrations are between 30% and 40%, and high concentrations are above 40%. According to different regions, soils and crops, it is necessary to use economical and efficient compound fertilizers. Generally high-concentration compound fertilizers are used in economic crops, which can make the crops superior in quality, with less fertilizer residue and high utilization rate. Pay attention to avoid direct contact with seeds or fertilisers or mixed use of fertilizers. Compound fertilizer has high nutrient content. If it is in direct contact with the roots of seed or seedlings, it will affect sprouting and even burning seedlings and rot. When sowing seeds, the seeds should be applied with a hole, apply compound fertilizer about 5-10 cm away, avoid direct and seed with the same hole, resulting in fertilizer damage. Attention should be paid to the use of nutrients. Different brands and different concentrations of compound fertilizers use different raw materials, and production should be selected according to the soil type and crop type. Nitrate-containing compound fertilizers should not be used in leafy vegetables and paddy fields; compound fertilizers containing ammonium ions should not be applied on saline-alkali soils; compound fertilizers containing potassium chloride or chloride ions should not be used on chlorine-tolerant crops or saline-alkali soils; Compound fertilizers containing potassium sulfate should not be used in paddy fields and acidic soils. Otherwise, it will reduce fertilizer efficiency and even poison crops. China Agricultural Network Editor
Artemisinin Powder,Luteolin Powder,Qinghaosu Powder
Pharmaceutical Intermediate Co., Ltd. , http://www.nspharmaceutical.com