Farmers in our country have a fine tradition of “seeing the heavens, seeing the land, and seeing crops.†Farmers and agrochemical service workers in various places must do a good job in the following aspects in the spring crop fertilization: When springing without mistakes, spring fertilization is mainly based on spring sowing crops such as spring corn and spring wheat, as well as fruit trees and vegetables for seedlings, combined with site preparation for applying base fertilizer or seed fertilizer. Followed by winter wheat, winter canola and other overwintering crops and transplanting consequences trees and greenhouse vegetables and other spring-grown crops, need timely and appropriate fertilizer. As the basic characteristics of the country’s climate change are the low temperatures in early spring and the warming of the weather, fertilization should be done without errors. In particular, in early-season crops such as spring wheat and potatoes sown in cold regions of northwestern China, organic fertilizers must be fully decomposed, and they should preferably be applied in conjunction with site preparation after the autumn harvest in the previous year. Ammonium and nitrate nitrogen fertilizers should be the first choice for topdressing fertilizers because of their fertilizer efficiency. Faster than urea; for seed fertilizers, it requires high quality, safety and appropriate amount, and it is applied simultaneously with the seeds but at the wrong position, ie do not directly contact the fertilizer with the seeds, otherwise it is easy to burn or reduce the product quality of the potato crops. Due to local conditions, China has a vast territory and the agricultural conditions vary greatly. In the northeast and northwest regions, it must be combined with cold-resisting and drought-resistant measures when sowing and fertilizing. Appropriate time for fertilizing and sowing when temperature and soil moisture are suitable, timely covering after fertilization; fertilization of rice and rapeseed in rape in Jianghuai area should be combined with Qingjian “Three Ditches†to prevent waterlogging, increase soil temperature and improve soil ventilation. condition. The Huang-Huai-Hai area was affected by rain and snow last spring, and the weather conditions were different. For the common wheat fields, appropriate amount of nitrogen fertilizer should be applied in conjunction with watering in the beginning jointing stage, generally 10-15 kilograms of urea in Mushi, and 3-7 kilograms of urea can be applied as appropriate in heading, or foliar fertilizer can be sprayed; Better wheat fields, can be applied to the appropriate amount of nitrogen fertilizer in the return period of the ditch without irrigation, generally Mushi ammonium sulfate 10 ~ 15 kg, or urea 5 ~ 10 kg, after starting jointing and appropriate top dressing 1; good soil moisture, fertility Higher Wangwangmiao field where the plant population is larger can be fertilized after jointing, and the amount of fertilizer is appropriately reduced. Appropriate fertilization mainly refers to the appropriate amount of nutrients, proper ratio of nitrogen, phosphorus and potassium, and appropriate proportion of base fertilizer. Taking food crops as an example, the total amount of nutrients per acre is currently 8 to 15 kg of nitrogen, rarely exceeding 17 kg; the amount of phosphorus applied is approximately half or even less than the amount of nitrogen applied, except for overwintering crops; The quantity is mostly between the amount of nitrogen applied and the amount of phosphorus applied, depending on the soil conditions. Because the northern calcareous soil is relatively low, it can even be used for short-term fertilization. The top dressing ratio is that all organic fertilizers, all or most of the phosphate fertilizers, all or part of the potassium fertilizers and about half of the nitrogen fertilizers are used as base fertilizers, and the remaining fertilizers are used as seed fertilizers or top dressings; top dressings are applied once or in divided portions. Comprehensive management to do a good job of spring fertilization must be closely coordinated with a variety of agricultural measures. For example, the use of base fertilizer should be combined with improvement of soil preparation and sowing quality. Top dressing should be closely coordinated with reasonable irrigation and tillage and weed control, especially for greenhouse vegetables harvested from eggplants and melons, etc., must be integrated with water and fertilizer management. Times. Dc 4.5V Co Alarm,Co Detector,Carbon Monoxide Alarm,Carbon Monoxide Detector Guangdong Isafenest Co.,Ltd. , https://www.isfenest.com