Biochar-Based Fertilizer Decreased Soil N2O Emission and Increased Soil CH4 Uptake in a Subtropical Typical Bamboo Plantation

作者：Enhui Wang, Ning Yuan, Shaofeng Lv, Xiaoping Tang, Gang Wang, Linlin Wu, Yufeng Zhou, Guomo Zhou, Yongjun Shi, Lin Xu · 发表于：Forests · 年份：2022 · DOI：10.3390/f13122181 · 被引用次数：14 · 研究领域：Soil Carbon and Nitrogen Dynamics、Soil and Unsaturated Flow、Clay minerals and soil interactions

Soil is a crucial contributor to greenhouse gas (GHG) emissions from terrestrial ecosystems to the atmosphere. The reduction of GHG emissions in plantation management is crucial to combating and mitigating global climate change. A 12-month field trial was conducted to explore the effects of different fertilization treatments (control, without fertilizer (CK); biochar-based fertilizer treatment (BFT); chemical fertilizer treatment (CFT); and mixture of 50% BFT and 50% CFT (MFT)) on the soil GHG emissions of a typical bamboo (Pleioblastus amarus (Keng) Keng f.) plantation. The results demonstrated that compared with the CK, BFT reduced the annual cumulative soil N2O emission by 16.3% (p < 0.01), while CFT and MFT significantly increased it by 31.0% and 23.3% (p < 0.01), respectively. Meanwhile, BFT and MFT increased the annual cumulative soil CH4 uptake by 5.8% (p < 0.01) and 7.5% (p < 0.01), respectively, while there was no statistically significant difference between CFT and the control. In addition, BFT, CFT, and MFT significantly increased the annual cumulative soil CO2 emission by 9.4% (p < 0.05), 13.0% (p < 0.01), and 26.5% (p < 0.01). The global warming potential (GWP) of BFT did not change significantly, while CFT and MFT increased the GWP by 13.7% (p < 0.05) and 28.6% (p < 0.05), respectively, compared with the control. Structural equation modeling revealed different treatments affected soil N2O and CH4 emission by changing soil labile carbon...