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| The effects of aeration and irrigation regimes on soil CO2 and N2O emissions in a greenhouse tomato production system |
| CHEN Hui1, HOU Hui-jing2, WANG Xiao-yun1, ZHU Yan1, Qaisar Saddique1, WANG Yun-fei1, CAI Huan-jie1 |
1 College of Water Resources and Architectural Engineering, Northwest A&F University/Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Yangling 712100, P.R.China
2 School of Hydraulic, Energy and Power Engineering, Yangzhou University, Yangzhou 25127, P.R.China |
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Abstract Aerated irrigation has been proven to increase crop production and quality, but studies on its environmental impacts are sparse. The effects of aeration and irrigation regimes on soil CO2 and N2O emissions in two consecutive greenhouse tomato rotation cycles in Northwest China were studied via the static closed chamber and gas chromatography technique. Four treatments, aerated deficit irrigation (AI1), non-aerated deficit irrigation (CK1), aerated full irrigation (AI2) and non-aerated full irrigation (CK2), were performed. The results showed that the tomato yield under aeration of each irrigation regime increased by 18.8% on average compared to non-aeration, and the difference was significant under full irrigation (P<0.05). Full irrigation significantly increased the tomato yield by 23.9% on average in comparison to deficit irrigation. Moreover, aeration increased the cumulative CO2 emissions compared to non-aeration, and treatment effects were significant in the autumn-winter season (P<0.05). A slight increase of CO2 emissions in the two seasons was observed under full irrigation (P>0.05). There was no significant difference between aeration and non-aeration in soil N2O emissions in the spring-summer season, whereas aeration enhanced N2O emissions significantly in the autumn-winter season. Furthermore, full irrigation over the two seasons greatly increased soil N2O emissions compared to the deficit irrigation treatment (P<0.05). Correlation analysis indicated that soil temperature was the primary factor influencing CO2 fluxes. Soil temperature, soil moisture and NO3– were the primary factors influencing N2O fluxes. Irrigation coupled with particular soil aeration practices may allow for a balance between crop production yield and greenhouse gas mitigation in greenhouse vegetable fields.
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Received: 05 May 2017
Accepted:
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| Fund: This work was supported by the National Natural Science Foundation of China (51309192), the National Key Research and Development Program of China (2016YFC0400201) and the Fundamental Research Funds for the Central Universities, China (Z109021510). |
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Corresponding Authors:
Correspondence HOU Hui-jing, E-mail: hjhou@yzu.edu.cn; CAI Huan-jie, E-mail: huanjiec@yahoo.com
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| About author: CHEN Hui, Mobile: +86-18700943054, E-mail: chenhui2014@nwsuaf.edu.cn |
Cite this article:
CHEN Hui, HOU Hui-jing, WANG Xiao-yun, ZHU Yan, Qaisar Saddique, WANG Yun-fei, CAI Huan-jie.
2018.
The effects of aeration and irrigation regimes on soil CO2 and N2O emissions in a greenhouse tomato production system. Journal of Integrative Agriculture, 17(2): 449-460.
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