1, due to the place, due to crop fertilization According to the soil fertility, PH value and the characteristics of the crop's fertilizer requirements, determine the amount and type of fertilizer fertilizer. 2, nitrogen, phosphorus, potassium, organic fertilizer, and trace element fertilizers mixed use The combination of various elements and organic fertilizers can reduce the adsorption and fixation of phosphorus on the soil and increase the fertilizer utilization. According to different crops applied different fertilizers per acre 1-2kg. 3, deep and concentrated facilities, multiple applications Deep application is an important way to increase the nitrogen use efficiency and reduce the loss of nitrogen fertilizer. It can not only reduce the volatilization of ammonia, but also reduce the loss of denitrification. On the one hand, the centralized application of phosphate fertilizer can reduce the contact surface between fertilizer and soil and reduce chemical fixation. It can also increase the concentration difference between the root system and crops, and promote the absorption of phosphorus by crops. In addition, phosphorus has poor mobility in the soil, and layered application can meet the demand for phosphorus at different growth stages. 4, suitable for use The nutritional critical period and the maximum efficiency period of crops are two key periods for crops to absorb nutrients, and these two periods should be grasped to ensure the maximum efficiency of fertilizers and the demand of crops for nutrients. In general, the critical period of phosphorus nutrition is in the early growth period, nitrogen is slightly later than the phosphorus in the critical period of nutrition. The maximum efficiency period is during the period from vegetative growth to reproductive growth. 5. Strengthen water management The supply of water is closely related to the absorption of crop nutrients. Improper use of water not only results in the loss of nutrients, but also affects the growth of crops. Appropriate irrigation can increase fertilizer utilization, but too much or too little will reduce utilization. 6, foliar spraying fertilizer on the crop spraying fertilizer, not only can meet the crop's demand for nutrients, but also can reduce the soil nutrient fixation, improve fertilizer utilization. 8, formula fertilization Experiments have shown that formula fertilization technology can increase the utilization rate of chemical fertilizer by 5%-10%, and it can also avoid blind fertilization and reduce fertilizer waste. In terms of absolute values, the amount of nitrogen absorbed by crops, the amount of residual soil, and the amount of fertilizer lost increase with the increase in the amount of nitrogen fertilizer; from the relative point of view, the use of nitrogen fertilizer decreases with the increase of the amount of fertilizer, and the loss rate is With the increase in the amount of fertilizer increases. We are a supplier of high-speed rapier looms and flexible rapier looms. The company specializes in selling second-hand rapier looms and economical rapier looms. Chinese second-hand rapier looms look for Tianchi. Second-Hand Rapier Loom,High-Speed Rapier Loom,Flexible Rapier Loom,Rapier Loom Changzhou Satidi Import and Export Co., Ltd. , https://www.guanjiejts.com