[1]WANG Mengxue,ZHANG Zhongxue,Lü Chunbo,et al.CH4 and N2O Emissions from Rice Paddy Field and Their GWPs Research in Different Irrigation Modes in Cold Region[J].Research of Soil and Water Conservation,2016,23(02):95-100.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
23
Number of periods:
2016 02
Page number:
95-100
Column:
Public date:
2016-04-28
- Title:
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CH4 and N2O Emissions from Rice Paddy Field and Their GWPs Research in Different Irrigation Modes in Cold Region
- Author(s):
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WANG Mengxue1,2, ZHANG Zhongxue1, Lü Chunbo3, LIN Yanyu1
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1. College of Water Conservancy and Architecture, Agricultural Key Laboratory of Efficient Utilization of Water Resources of Agriculture Ministry in Northeast Agricultural University, Harbin 150030, China;
2. Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China;
3. Water Conservancy Management Center of Heilongjiang, Harbin 150001, China
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- Keywords:
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irrigation mode; CH4 emission; N2O emission; emission flux; global warming potentials
- CLC:
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S274.3
- DOI:
-
-
- Abstract:
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CH4 and N2O emission fluxes were measured in rice paddy field of cold region in Heilongjiang under four moisture management modes by using the method of static chamber-gas chromatograph technique. Four different treatment methods including control irrigation, wet irrigation, intermittent irrigation and flood irrigation were utilized in order to study the CH4 and N2O emission characteristics. The results indicated that the CH4 and N2O emission peak appeared in the rice vigorous growth period and the emissions reduced in leisure period no matter what kind of irrigation methods were utilized. Compared with flood irrigation, the CH4 emission of wet irrigation decreased by 27.2%,the CH4 emission of control irrigation decreased by 34%, and intermittent irrigation model significantly decreased by 48.2%. Flood irrigation paddy N2O emissions reduced 0.41 kg/hm2 compared to the intermittent irrigation paddy fields, increased 0.38 kg/hm2 compared to control irrigation and increased 0.37 kg/hm2 compared to wet irrigation paddy. With respect to analyzing overall greenhouse effect, water saving irrigation mode can effectively decrease and control CH4 and N2O emissions. At rice growth stages, N2O emissions increased accordingly in the period of CH4 emissions reduction. By considering the relationship of the growth and decline between CH4 and N2O emissions, the paddy fields of greenhouse gas emissions can be effectively slowed down.