In the winter wheat irrigated area, before the wheat is sown, organic manure and 60% of the chemical nitrogen fertilizer required for the N amount, and 100% of the phosphorus and potassium fertilizers are spread after the wheat is spread, and the local plant protection is combined according to the local soil and climatic conditions. Station soil analysis is performed under fertilization. Generally, 30-40 kg of compound fertilizer can be applied. In the arid winter wheat region, due to the low rainfall during wheat growth, the effect of applying topdressing is poor, and no top dressing is generally applied. The use of organic fertilizers and fertilizers was once deepened before wheat sowing. top dressing In the irrigated winter wheat area, in early spring wheat returning green joint stage, combined with spring irrigation, followed by returning green manure. Top dressing is nitrogen fertilizer, and the application amount is 40% of the total nitrogen requirement in the whole growth period. 1, the principle of fertilization (1) Applying organic fertilizer with increased basal fertilizer to increase soil organic matter content, fertilize soil capacity, and enhance soil fertility and water retention capacity. (2) Reapplying joint fertilizer (dressing) See seedlings for fertilizer application, wheat delivery, seedling growth, strong growth, should be appropriate late planting, wheat less tillering, seedlings are not good, grow weak, should be appropriate early. (3) Lightly applying the panicle fertilizer, it is not suitable to apply panicle fertilizer to wheat fields with sufficient water and fertilizer, and lodging tendency. Seedling growth is good, can be applied with or without panicle fertilizer, water and fertilizer is insufficient, there is a tendency to premature aging of wheat should be applied panicle fertilizer, can be applied to panicle fertilizer to quickly add nutrients, increase grain weight, strong stalks prevent collapse. (4), foliar dressing in late May each year is a dry hot wind season, with 0.2% potassium dihydrogen phosphate foliar spray fertilizer 1-2 times, interval 5-7 days, can effectively prevent the damage of dry hot wind. 2, the amount of wheat fertilizer The amount of nutrients absorbed per 100kg of wheat grain is determined by factors such as soil, climate (rainfall, temperature, light) variety, yield, and other factors. The results of the Soil Fertility Research Institute of the Chinese Academy of Agricultural Sciences are: N 3.0 kg/100 kg grain; P 0.40-0.65 kg/100 kg grain; K 1.7-3.3 kg/100 kg grain. Determination of the amount of wheat fertilizer Most of the nutrients absorbed by wheat come from the fertilizer applied in the season, but there is still a considerable portion of nutrients provided by the soil. In addition, fertilizers applied in the current season are not 100% absorbed by plants. Some or most of them are adsorbed, fixed, or lost in various forms. Therefore, fertilizers have a problem of utilization. Therefore, it is very necessary to do scientific and reasonable fertilization. N, P, and K are indispensable three elements. The absorption of various nutrients varies during the various growth and development stages of wheat. In general, from the jointing stage to the flowering stage, the peak period of wheat nutrient absorption during its lifetime, the amount of nutrients absorbed by this stage accounted for more than 50% of the nutrient absorption during the whole growth period, especially the absorption of phosphorus and potassium. Winter wheat has a long wintering period. Although it grows slowly during this period, it has an important role in the absorption of nutrients, especially the absorption of nitrogen. The supply of nutrients at this stage is good, which helps to increase the number of effective tillers and total panicles before winter. However, excessive supply of nutrients, especially N-supply, will cause pre-winter seedlings to prosper, prone to frost damage, and reduce production. The whole growing period of spring wheat is short, and there is a need for sufficient and quick nutrient supply throughout the growing season. Sport And Fitness,Gym Equipment Price,Folded Fitness Equipment,Exercise Equipment For Sale Eastony Industries (NingBo) Co., LTD. , https://www.eastony.com