Right now, it is the best time for the autumn crops to be fertilized and fertilized. According to local conditions, the requirements for balanced fertilization in autumn sowing crops to do a good job in autumn sowing crops fertilizer fertilization is a key measure related to high quality and high yield in autumn sowing. Autumn crops fertilizer fertilizer should grasp the following five major technical points: 1, comprehensive increase in organic fertilizer. Each acre guarantees the application of more than 1,500 kilograms of organic fertilizer to achieve a combination of land use and land use. It should be noted that: before the application of organic fertilizer should be fully stacked and cooked. 2, according to local conditions and scientific application of chemical nitrogen fertilizer. The commonly used varieties of chemical nitrogen fertilizers include ammonium bicarbonate, urea and ammonium chloride. However, it should be noted that ammonium ammonium bicarbonate such as ammonium bicarbonate, ammonium sulfate, ammonium chloride, ammonium phosphate, etc. should not be mixed with calcium, magnesium phosphate fertilizer, grass ash, lime and other alkaline fertilizers, otherwise it will produce ammonia volatilization and reduce the effect of fertilizer; use urea as Fertilizer fertilizer should not be directly contacted with seeds, and control the amount of application, not more than 2.5 kilograms per acre, because urea contains diuretic urine, the concentration is too high will make the seed poisoning, affecting seed germination; ammonium bicarbonate should not be applied to the surface too For a long time, do not apply lightly, apply immediately after application of soil or appropriate deep application, due to the nature of ammonium bicarbonate is extremely unstable, it is easy to volatilize, so that the loss of nutrients; all nitrogen fertilizers should be combined with phosphorus, potash fertilizer application. 3, the correct choice of potassium dihydrogen phosphate. Potassium dihydrogen phosphate is a high-concentration, high-enrichment and high-quality phosphorous and potassium-based high-efficiency compound fertilizer, which is commonly applied to autumn crops such as wheat and rapeseed. Potassium dihydrogen phosphate can be used as base fertilizer, but also as top dressing. When used as base fertilizer, according to autumn crops, the amount of 7.5-10 kilograms per acre is used in combination with nitrogen fertilizer; the top dressing is mainly sprayed, and can be carried out from the seedling stage to the middle and late growth stages of the crop, and the spraying concentration is 0.4-0.5%. Every 50 kilograms of water is 0.2-0.25kg of potassium dihydrogen phosphate, required to be fully dissolved, with the use of matching, and according to the seedlings to control the number of spraying, spraying 2-3 times. 4, make good use of special compound (mixed) fertilizer. The special compound (mixed) fertilizer contains various nutrient elements such as nitrogen, phosphorus, potassium, and micro, which are required for the growth of crops. Compared with simple fertilizer or conventional fertilization, the yield can reach 10-15%. Become the fertilizer of choice in autumn sowing production. 5, targeted application of boron, molybdenum, zinc and other high-quality fertilizer. In autumn sowing crops, rape, fruit trees, etc. are boron-rich crops and are very sensitive to boron. Although the demand for crops is minimal, they can generally receive the finishing touch and icing on the cake after application. Borage of rapeseeds, fruit trees, etc. are generally applied in base treatments, 0.5-1 kilograms per mu, but also foliar spray, 0.1-0.2 kilograms of boron fertilizer for mu, 40-50 kilograms of water for watering, and the use of seed dressings for wheat molybdenum That is, one acre seed can be seeded with 12 grams of molybdenum, and zinc can be directly applied with 1-1.5 kg of zinc fertilizer as a base fertilizer. China Agricultural Network Editor