After the spring, I went to a fertilizing season. Farmers' friends should pay attention to the following points when choosing and using compound fertilizer:

The compound fertilizer has long effect and is easy to be used as the base fertilizer. The compound fertilizer processed and granulated is slower than the powder fertilizer, and is not easy to be lost and volatilized. The fertilizer effect lasts for a long time and is easy to be used as a base fertilizer. The general dosage is 30-40 kg. Compound fertilizer should not be used for seedling fertilizer and mid-late fertilizer, to avoid greed.

The decomposition of compound fertilizer is slower. Note that the use of crop nitrogen fertilizer in combination with elemental nitrogen fertilizer requires less nitrogen fertilizer. Therefore, crops with compound fertilizer as base fertilizer should be supplemented with quick-acting nitrogen fertilizer according to the fertilizer requirement of different crops. To meet the nutritional needs of crops. The concentration of compound fertilizer is quite different. It should be noted that the appropriate concentration should be selected. At present, most compound fertilizers are configured according to the average nutrient status of soil types in a certain area and the proportion of fertilizer required for large crops. There are high, medium and low concentration series compound fertilizers on the market. Generally, the total concentration of total nutrients is between 25% and 30%, the medium concentration is between 30% and 40%, and the high concentration is above 40%. It is necessary to use economical and efficient compound fertilizers due to different regions, soils and crops. Generally, high-concentration compound fertilizer is used in economic crops, with excellent quality, less residue and high utilization rate.

The concentration of compound fertilizer is high, avoiding direct contact of seeds with fertilizer or mixing of fertilizers. The compound fertilizer has a high nutrient content. If it is in direct contact with the seed or seedling roots, it will affect the emergence of seedlings and even the burning of seedlings and rotten roots. When planting, the seeds should be separated from the point application and the compound fertilizer by 5-10 cm. It should not be directly applied to the same point with the seeds, causing fat damage.

The ratio of compound fertilizer to raw material should be different. It should be noted that the use range of nutrient components is different from that of different brands and different concentrations of compound fertilizer. The production should be selected according to soil type and crop type. Nitrate-containing compound fertilizer should not be used in leaps and paddy fields; compound fertilizers containing ammonium ions should not be applied on saline-alkali soil; compound fertilizers containing potassium chloride or chloride ions should not be used on chlorine-free crops or saline-alkali soils; Compound fertilizer containing potassium sulfate is not suitable for application in paddy fields and acidic soils. Otherwise, it will reduce fertilizer efficiency and even poison crops.