The method of applying ammonium nitrate to paddy field should be proper

Ammonium nitrate is a quick-acting fertilizer containing both ammonium nitrogen and nitrate nitrogen. After being dissolved in the soil, half of it is nitrate nitrogen and half is ammonium nitrogen, which can be absorbed and utilized by crops. In acidic soils, ammonium ions can be adsorbed by soil colloids, replacing hydrogen ions and nitrates into nitric acid. In neutral and calcareous soils, ammonium ions can be replaced by calcium ions from soil colloids to form calcium nitrate. Salt.

The nitric acid and nitrates formed after the application of ammonium nitrate are not easily adsorbed by the soil colloid, and are easy to flow with water, especially in paddy fields, and nitrogen loss is greater than that in dry land. In addition, in an anaerobic environment such as paddy soil, nitrate easily infiltrates into the water field reducing layer, which can generate ammonia gas or nitrogen monoxide under the action of denitrifying bacteria, resulting in denitrification loss. If it is applied, it should also be applied during the period of rice abundance and the formation of young spikes with high utilization rate of nitrate nitrogen. The application should pay attention to water management, fertilization about 3 cm in shallow water, and natural after application. Drain and refill afterwards.
Author: a water
Source: China Cooperation Times
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