Response of Soil CO2 Emission to Soil Catalase Activity and Tomato Growth under Aerated Condition

Water Saving Irrigation ›› 2018 ›› (12) : 12-16.

HU Wen-tong1 ，YANG Zhi-chao1 ，ZHENG Xin-jie1 ，JIANG Hong-li 1 ，CAI Huan-jie1，2 ，CHEN Hui 1，2

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In order to study the effects of soil catalase activity (CAT) and tomato growth on soil CO2 emission under the condition of aerated irrigation, an experiment was conducted by using the static closed chamber/gas chromatography method from April to July, 2017. The experiment adopted two treatments: aerated irrigation (AI) and traditional subsurface drip irrigation (CK). Soil CO2 flux, CAT, soil water-filled pore space (WFPS), soil temperature and plant height of tomato were measured simultaneously. The results indicated that throughout the whole growth stage of tomato, soil CO2 fluxes showed a first increasing then decreasing under the two treatments, and soil catalase activity presented a fluctuating change and reached the maximum value at the end of tomato growing period. Compared to CK, AI increased cumulative soil CO2 emissions by 2.4%, but the treatment effect was not significant (P>0.05). AI promoted tomato growth, increased CAT and soil temperature, while decreased WFPS, but the differences between the two treatments did not reach a significant level (P>0.05). Positive correlations between soil CO2 fluxes with CAT, soil temperature and plant height were observed (P>0.05). Significant negative relationships among soil CO2 fluxes and WFPS were reported (P<0.01)

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aerated irrigation / soil CO2 / soil catalase activity / tomato

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HU Wen-tong, YANG Zhi-chao, ZHENG Xin-jie, JIANG Hong-li, CAI Huan-jie, CHEN Hui. Response of Soil CO2 Emission to Soil Catalase Activity and Tomato Growth under Aerated Condition. Water Saving Irrigation. 2018, 0(12): 12-16

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Received	Revised	Published
2018-06-19	2018-08-21	2018-12-15
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2018-12-31

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