The effects of aeration and irrigation regimes on soil CO2 and N2O emissions in a greenhouse tomato production system

doi:10.1016/S2095-3119(17)61761-1

摘要/Abstract

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.

Key words: aerated irrigation , water management , greenhouse gas emissions , tomato production system , yield

. [J]. Journal of Integrative Agriculture, 2018, 17(2): 449-460.

CHEN Hui, HOU Hui-jing, WANG Xiao-yun, ZHU Yan, Qaisar Saddique, WANG Yun-fei, CAI Huan-jie. The effects of aeration and irrigation regimes on soil CO₂ and N₂O emissions in a greenhouse tomato production system[J]. Journal of Integrative Agriculture, 2018, 17(2): 449-460.

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The effects of aeration and irrigation regimes on soil CO₂ and N₂O emissions in a greenhouse tomato production system

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