Single-season rice region in the upper reaches of the Yangtze River (east of Sichuan Province, all of Chongqing, southwestern Shaanxi, some counties in northern Guizhou, western Hubei) Fertilization principle (1) Add organic fertilizer and promote the combination of organic and inorganic. (2) Adjust the ratio of base fertilizer to top dressing and reduce the amount of nitrogen fertilizer used in the previous period. (3) Deep application of base fertilizer, topdressing "with water with nitrogen". (4) Appropriately reduce the amount of phosphorus fertilizer in rice in the oil rice field. (5) Select medium and low concentration phosphate fertilizers, such as calcium magnesium phosphate fertilizer and calcium, etc.; potassium fertilizer to choose potassium chloride. (6) In a field with a soil pH of 5.5 or less, a silicon-containing alkaline fertilizer or a base applied lime is suitably applied. 2. Fertilization advice (1) The production level is below 450 kg/mu, the nitrogen fertilizer (N) dosage is 6~8 kg/mu; the production level is 450~550 kg/mu, the nitrogen fertilizer (N) dosage is 8~10 kg/mu; the production level is 550~650 kg. /mu, nitrogen fertilizer (N) dosage 10~12 kg/mu; production level 650 kg/mu or more, nitrogen fertilizer (N) dosage 12~14 kg/mu. Phosphate fertilizer (P2O5) 5~7 kg/mu, potash fertilizer (K2O) 4~6 kg/mu. (2) Nitrogen fertilizer base fertilizer accounts for 35%~55%, manure fertilizer accounts for 20%~30%, panicle fertilizer accounts for 25%~35%; organic fertilizer and phosphate fertilizer are all applied; potassium fertilizer base fertilizer (60%~70%) and Spike fertilizer (30%~40%) was applied twice. (3) In the zinc-deficient and boron-deficient areas, the appropriate amount of zinc fertilizer and boron fertilizer should be applied; in the soil with strong acidity, the application of siliceous alkaline fertilizer or quicklime should be 30~50 kg per mu. This article URL: Guiding Opinions on Rice Science Fertilization Technology in the Single-season Rice Region of the Upper Reaches of the Yangtze River in Spring of 2015
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