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Effects of UV‐B radiation on soil carbon conversion and greenhouse gas emission in paddy soil

Tianguo Li, Xiang Li, Yong Liang, Mingrui Li, Ming Jiang, Fangdong Zhan, Yuan Li and Yongmei He

Greenhouse Gases: Science and Technology, 2020, vol. 10, issue 5, 965-979

Abstract: This paper evaluates the relationship between ultraviolet‐B (UV‐B, 280–315 nm) radiation enhancement on the earth's surface caused by ozone attenuation and climate change. A pot experiment was conducted to investigate the effects of enhanced UV‐B radiation on greenhouse gas (GHG) emissions from the paddy soil with rice straw incorporation (SI). The paddy soil was sampled from the Yuanyang Terrace, Yunnan Province, Southwest China. There were four treatments: natural light (control check, CK), 5.0 kJ·m−2 UV‐B radiation (UVB), SI, and SI + UVB. The effects of UV‐B radiation (5.0 kJ·m−2) on straw degradation, soil carbon invertase activity, active organic carbon content, and GHG emissions were studied. The results showed that UV‐B radiation promoted the degradation of straw components (lignin, cellulose, hemicellulose, and water‐soluble phenol). The SI treatment significantly increased the activity of soil carbon invertase (P

Date: 2020
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