Current Advances in Agricultural Sciences(An International Journal)
Year : 2009, Volume : 1, Issue : 1
First page : ( 1) Last page : ( 3)
Print ISSN : 0975-2315. Online ISSN : 2394-4471.

Emission of nitrous oxide from soil in relation to temperature, fertilizer application and moisture regime

Pathak H*

Division of Environmental Sciences, Indian Agricultural Research Institute, New Delhi-110 012, India

*Email of corresponding author: hpathak.iari@gmail.com

Online published on 15 October, 2015.

Abstract

Nitrous oxide (N₂O) is one of the important greenhouse gases responsible for global warming and destruction of the ozone layer. In a laboratory experiment the effects of moisture regime, temperature, and N fertilizer application on emission of N₂O from soil were studied. Gas samples were analyzed with a gas chromatograph equipped with electron capture detector. Total emission of N₂O during 32 days ranged from 0.03 mg N₂O kg⁻¹ soil at 5°C with no fertilizer at field capacity to 26.26 mg N₂O kg⁻¹ soil at 5°C with 200 mg N kg⁻¹ soil in submerged condition. Emission of N₂O was higher in submerged condition compared to field capacity moisture regime of soil. Application of N as ammonium sulphate increased the emission in both the moisture regimes. Emission of N₂O in field capacity moisture regime was the highest at 45°C, whereas in submerged condition the highest emission was recorded at 25°C. There was a strong interaction effect of temperature and moisture regime on emission of N₂O.

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Keywords

Fertilizer, Moisture regime, Nitrous oxide, Soil, Temperature.

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