(I) Determination of nitrogen, phosphorus, and potassium Fertilizer amount Fertilizer consumption = target yield per unit of nutrient uptake (1 - contribution rate of soil nutrient) Fertilizer season utilization Fertilizer nutrient content 1 The target production is generally determined by the increase of 10%-20% of the balance production in the local two years under normal climatic conditions. 2 Unit Yield The amount of nutrient absorption refers to the amount of nutrients needed to be absorbed per unit of economic output produced. (can be found from data) 3 Soil nutrient contribution rate refers to the percentage of nutrients absorbed by the fruit tree from the soil supply part. Soil nutrient contribution rate = soil effective nutrient content (soil test value) critical concentration value; When the soil organic matter is 1%, the critical concentration of nitrogen is taken as 120, the critical concentration of phosphorus is 30, and the critical concentration of potassium is 190. (4) The utilization ratio of fertilizers varies according to different fertilization methods. Soil fertilization, base fertilizer plus top dressing, and fertilizer fertility distribution are all reasonable. The seasonal utilization rate of nitrogen fertilizer is 45%, the seasonal utilization rate of phosphate fertilizer is 30%, and potassium fertilizer is used. The utilization rate of the season is taken as 60%. When base fertilizer and drip irrigation are used to fertilize with water, the seasonal utilization rate of nitrogen fertilizer takes 70%, the utilization rate of phosphate fertilizer is 40% in the season, and the utilization rate of potash fertilizer is 80% in the current season. (B) Organic fertilizer application amount of soil organic matter content (C) Supplementation of trace elements in effective soil trace elements, effective zinc Best Tourniquet,Tourniquet Online,Disposable Tourniquet,Tourniquet For Blood Draw GUANGDONG JIANGMEN RONGHAI MEDICAL TECHNOLOGY CO.,LTD , https://www.kimaomedical.com