文献类型： 外文期刊

作者： Wang Xuexia;Li Mengjia;Qiao Dan;Chen Yanhua;Cao Bing;Liu Dongsheng;Wang Jiachen

作者机构：

关键词： Cultivation years;Greenhouse soil;CO') emission fluxes;N20 emission fluxes;Greenhouse gas warming potential emission intensity

期刊名称： FRESENIUS ENVIRONMENTAL BULLETIN

ISSN： 1018-4619

年卷期： 2022 年 31 卷 1A 期

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收录情况： SCIE（2022版）

摘要： The response trends for CO), N20, and CH4 greenhouse gas emissions (GHGs) and factors influencing them in greenhouse vegetable soils following different of cultivation years were revealed in this study. The greenhouse vegetable fields of cultivation for 1 year (CK), 5 (Y5), 10 (Y10), 15 (Y15), and 20 years (Y20) under the same management systems were selected for this study. GHGs in the experimental greenhouse vegetable soils were determined by GHGs fluxes combined with soil physical and chemical properties. enzyme activities, and other environmental factors. The results showed differential responses of the three greenhouse gases according to the cultivation years of vegetable soils. The emission fluxes and total emissions of CO2 and N20 were significantly increased (P<0.05) with increasing cultivation years compared with that of the CK, and N20 emission fluxes was more affected by cultivation years, whereas the effect of cultivation years on CH4 emission was not significant. The greenhouse gas warming potential (GWP) and emission intensity (GHGI) of greenhouse vegetable soils were significantly increased (P<0.05) with increasing cultivation years, and the contribution rate of N20 to GWP also was increased with cultivation years. Redundancy analysis (RDA) showed that soil organic carbon (SOC), NO3--N content, 13-1,4-N-acetyl-glucosaminidase (NAG). nitrate reductase (NRA), and pH were the key factors to influence the GHGs of greenhouse vegetable soils. Therefore, long-term cultivation of greenhouse vegetables promoted the emission of CO, and N20 by increasing the content of SOC and NO3--N in soil, improving the activities of NAG and NRA, and reducing soil pH. In conclusion, emission fluxes, total emissions, GWP, and GHGI were gradually increased with increasing cultivation years. Therefore, reasonable measures should be taken to reduce NO3--N content and increase in soil pH, which may contribute to decrease GHGs in long-term cultivation of greenhouse vegetable soils.

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