What are the tricks of choosing compound fertilizer?

What are the tricks of choosing compound fertilizer? Please introduce the following methods for the selection of compound fertilizer: three major trends in the development of compound fertilizer: the first is multi-variety specialization. Different crops have different special fertilizers, which are developed and produced according to the law of crop growth and development and fertilizer absorption. When choosing compound fertilizer, farmers should turn up and choose the corresponding special fertilizer for different crops. If it is not dedicated, it violates the law of crop fertilizer absorption, the yield-increasing potential of crops can not be brought into full play, and some nutrient elements are wasted at the same time. The second is multi-functional medicinalization. With the combination of pesticides and chemical fertilizers and eliminating the seed dressing procedure, one application can not only ensure the nutrients needed by crops, but also control underground pests, early seedling damage, and have multiple effects. The third is the long-term effect of high concentration. With the development of agricultural production, high concentration and long-acting compound fertilizer is more and more welcomed by farmers. the application of this type of fertilizer reduces the amount of fertilizer, facilitates farming, eliminates topdressing, reduces labor, and improves fertilizer utilization efficiency. save labor, save labor, save time, improve quality and efficiency. How to choose compound fertilizer? Look at the packaging. Qualified products double-layer packaging, moisture-proof. The appearance of the package has three certificate numbers: production license number, business license number, product quality registration certificate number, nitrogen, phosphorus, potassium content identification, manufacturer, address and so on. Open the outer package and have the product instruction manual in the bag. Second, look at the physical properties of compound fertilizer. The compound fertilizer with good product quality has uniform particle size, no caking and no crushing powder. Third, it is necessary to purchase the production equipment and production technology of regular manufacturers are relatively advanced, and the products produced are uniform in particles, balanced in nutrients, and stable in quality. the products are developed by experts after long-term experiments according to the soil nutrient status and the characteristics of crop fertilizer demand. the formula is scientific and reasonable, well-targeted, full of nutrients and sufficient content. Fourth, the compound fertilizer suitable for the local area should be selected. Most of the locally produced compound fertilizer is based on the soil nutrient content, crop fertilizer demand law and fertilizer effect in this and surrounding areas. Some farmers blindly buy compound fertilizer which is not suitable for local application, which not only affects the growth and development of crops, resulting in the waste of individual nutrient elements, but also affects the yield. Five taboos to use "dichloro" compound fertilizer year after year. Dichloride compound fertilizer is a compound fertilizer produced with ammonium chloride and potassium chloride as raw materials, in which the content of chloride ion is high. Chloride ion is a trace element needed for action growth, appropriate amount can promote action growth, excessive will cause fertilizer damage. If the "dichloride" compound fertilizer is applied year after year, the recommended retention amount of chloride ion in the soil is large, and the excessive absorption will lead to "chlorine damage" and "salt damage". Compound fertilizer is generally used as base fertilizer. The basic application method is applied during soil preparation before sowing, there is a kind of fertilizer applied in the first line, and there is a kind of fertilizer in the second line, that is, lateral deep fertilization. At present, the effect of deep application of long-term compound fertilizer is the best. The position of deep application on the side should generally reach 5m / m 7 cm from the depth of the seed. The lateral deep application realizes the isolation of seed fertilizer and avoids burning seeds and seedlings. Click to get more compound fertilizer application techniques