Influences of two irrigation systems on soil N2O emissions from vineyards in Ningxia, China

doi:10.7523/j.issn.2095-6134.2016.02.006

Abstract

Abstract:

The system of furrow irrigation which can dissolve solid fertilisers in irrigation water (FIS) is widely applied in vineyards in Ningxia Hui autonomous region. Meanwhile the system of drip irrigation and fertigation (DIS) has also been employed in some areas. These irrigation systems may affect nitrous oxide (N₂O) emissions from the soil. Therefore, it is important to study the differences in N₂O emissions and identify farmland management methods that limit N₂O emissions. During the July-August 2012 and July-September 2013 growing seasons, this study was conducted by using the static chamber-gas chromatograph technique to observe the soil N₂O emissions from vineyards in Ningxia. The results showed that: the annual N₂O emission reductions reached (18.24±2.79) kg/(hm^-2 ·a^-1) (61.1%) in 2012 and (3.37±0.37) kg/(hm^-2 ·a^-1) (78.9%) in 2013 by changing FIS for DIS. The annual reduction amounts of N₂O emissions, estimated by using emission factor, were approximately 704 264-770 756 kg and 215 550-223 920 kg in 2012 and 2013, respectively, after changing FIS for DIS in the vineyards in Ningxia. In conclusion, DIS has greater reduction potential for N₂O emissions in Ningxia vineyards.

Key words: drip irrigation, furrow irrigation, emission factor, vineyard, nitrous oxide

CLC Number:

S275
X511

ZHANG Yajie, NIU Haishan. Influences of two irrigation systems on soil N₂O emissions from vineyards in Ningxia, China[J]. , 2016, 33(2): 178-186.

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Influences of two irrigation systems on soil N₂O emissions from vineyards in Ningxia, China

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