title: Mitigating nitrous oxide emissions from tea field soil using bioaugmentation with a Trichoderma viride biofertilizer.
abstract: Land-use conversion from woodlands to tea fields in subtropical areas of central China leads to increased nitrous oxide (N2O) emissions, partly due to increased nitrogen fertilizer use. A field investigation of N2O using a static closed chamber-gas chromatography revealed that the average N2O fluxes in tea fields with 225 kg N ha(-1) yr(-1) fertilizer application were 9.4 ± 6.2 times higher than those of woodlands. Accordingly, it is urgent to develop practices for mitigating N2O emissions from tea fields. By liquid-state fermentation of sweet potato starch wastewater and solid-state fermentation of paddy straw with application of Trichoderma viride, we provided the tea plantation with biofertilizer containing 2.4 t C ha(-1) and 58.7 kg N ha(-1). Compared to use of synthetic N fertilizer, use of biofertilizer at 225 kg N ha(-1) yr(-1) significantly reduced N2O emissions by 33.3%-71.8% and increased the tea yield by 16.2%-62.2%. Therefore, the process of bioconversion/bioaugmentation tested in this study was found to be a cost-effective and feasible approach to reducing N2O emissions and can be considered the best management practice for tea fields.
authors: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
authors: Shengjun
authors: S
authors: Xu
authors: Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China.
authors: Xiaoqing
authors: X
authors: Fu
authors: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
authors: Shuanglong
authors: S
authors: Ma
authors: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
authors: Zhihui
authors: 0000-0002-3818-527X
authors: Z
authors: Bai
authors: Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China.
authors: Runlin
authors: R
authors: Xiao
authors: Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China.
authors: Yong
authors: Y
authors: Li
authors: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
authors: Guoqiang
authors: G
authors: Zhuang
mesh_terms: D000383:Agriculture; D001673:Biodegradation, Environmental; D005308:Fertilizers; D009609:Nitrous Oxide / Q000378:metabolism*; D012987:Soil / Q000737:chemistry*; D013662:Tea; D014242:Trichoderma / Q000378:metabolism*
chemical_list: D005308:Fertilizers; D012987:Soil; D013662:Tea; D009609:Nitrous Oxide