Single-season rice region in the northeastern cold region (all in Heilongjiang Province and some counties in Hulunbeier City, Inner Mongolia Autonomous Region)
1. Fertilization management principles
(1) According to the results of soil testing and formula fertilization, the amount of nitrogen and phosphorus fertilizer is appropriately reduced, and the amount of potassium fertilizer is optimized.
(2) Reduce the amount and proportion of base fertilizer and nitrogen, increase the proportion of panicle fertilizer, and make the ratio of ear fertilizer to nitrogen at jointing stage reach about 30%.
(3) Early application of green fertilizer to promote early splitting, and return to green fertilizer within 3 days after transplanting.
(4) Appropriate supplementation of trace elements according to soil nutrient status. (5) Calcium, magnesium and phosphate fertilizers should be applied to the acidic sites, and less or no urea should be used for topdressing in the alkaline sites. Ammonium sulfate can be used as top dressing.
(6) After the application of the base fertilizer, the rotary tillage is carried out to achieve full-layer fertilization; the water-saving irrigation technique is adopted, and the field is applied for about 3 days before fertilization, and the water is fertilized with nitrogen.
2. Fertilization advice
(1) Recommended 13-19-13 (N-P2O5-K2O) or similar formula. (2) The production level is 450~550 kg/mu, and the recommended dosage of formula fertilizer is 18~23 kg/mu. The fertilizer is divided into 5~7 kg/mu and 3 kg/mu respectively.
(3) The production level is 550~700 kg/mu, the recommended dosage of formula fertilizer is 23~29 kg/mu, and the fertilizer is divided into 7~8 kg/mu, 3~4 kg/mu, and the grain fertilizer is applied. Potassium chloride 1~3 kg/mu.
(4) The production level is above 700 kg/mu, the recommended dosage of formula fertilizer is 29~33 kg/mu, and the fertilizer is divided into 8~10 kg/mu, 4~5 kg/mu, and the grain fertilizer is chased by chlorine. Potassium is 1~3 kg/mu.
(5) The production level is below 450 kg/mu, and the recommended dosage of formula fertilizer is 14~18 kg/mu. The fertilizer for splitting and the grain of corn are applied 4~5 kg/mu, 2~3 kg/mu respectively.
This article URL: Guiding Opinions on Rice Science Fertilization Technology in the Single-season Rice Region of Northeast China in 2015
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