Citrus results early, long fruiting period, large amount of flowers, pumping spring, summer and autumn shoots three times, no significant deep sleep. The demand ratio of nitrogen, phosphorus and potassium nutrients is about 1:0.20:0.70, and the amount of fertilizer needed is 1.5 to 2 times that of deciduous fruit trees. The amount of potassium applied by citrus: Near nitrogen fertilizer in South China, nitrogen in central China is 65% to 75%. Balanced application of nitrogen, phosphorus, potassium, high yield and high quality, improve storage. Citrus planting should also be adapted to local conditions and be flexible: 1 close planting of oranges, small trees, shallow roots, to be diligent and thin; 2 more flowers, more fruit, weak shoots, timely fertilization; 3 less fruit and good shoot growth, In order to prevent excessive growth, less fertilizer is needed; 4 early-maturing varieties need to be fertilized early, and late-maturing varieties can be used late. The yield per mu in the main citrus production area is generally between 2500 and 3500 kg. According to this yield, the amount of fertilizer per acre is recommended: 1 after fruit fertilizer, also called fruit fertilizer (10-12 months): compound fertilizer 50-75 kg, high-quality organic fertilizer 100-200 kg or farmyard fertilizer 1- 3 tons, 1 to 3 times. 2 Fertilizer before flowering, also known as flowering fertilizer (February to March): Urea 20 to 25 kg. 3 strong fruit fertilizer (July to October): Urea 20 to 25 kg, potassium chloride 20 to 25 kg, 1 to 2 times Shi. The yield is higher than the upper limit of fertilization, and the lower limit is lower. After the fruit, the fertilizer and the strong fruit fertilizer are applied with potassium, and the stress resistance is enhanced. The post-flowering fertilizer, also known as the stable fruit fertilizer (May-June), uses less nitrogen fertilizer, less stimulation of the summer shoots, reduces the fruit drop, and can use nitrogen. Phosphorus and potassium fertilizer spray 2 to 3 times. Precocious citrus varieties, do not hang fruit in the trees, apply nitrogen fertilizer before harvesting, and facilitate fruit storage. Citrus is a deep-rooted crop, mostly at a depth of 15 to 40 cm, fertilized under the canopy, and applied or applied in a circular hole; Basal fat should be deep, 30 to 40 cm; dressing should be shallow, 10 to 20 cm. After the rain, it should grab time and fertilize. The distance between the fertilizer and the root should be about 5 to 10 cm so as not to damage the roots. The orchards are well drained and used mostly with chlorine-based fertilizers; The orange field management and pruning are good, and the effect of fertilization will be good. Fruit trees are prone to lack of magnesium, boron, etc. and must be sprayed in time. In Vitro Diagnostics,Urine Ketone Strips,Ketone Urine Test Strips,Home Test Ketone Test Strips Changchun Medicon Technology Development Co., Ltd , https://www.teststrip.pl