Possibility of avoiding legumes-deriving boost of N 2 O emissions in tropical monoculture tree plantations  

作　　者：Taiki Mori Chongrak Wachrinrat Duriya Staporn Ryota Aoyagi Ponthep Meunpong Warawich Suebsai Khitja Boonsri Kanehiro Kitayama 

机构地区：[1]Forest Ecology Laboratory,Graduate School of Agriculture,Kyoto University,Kitashirakawa Oiwake-cho Sakyo-ku,Kyoto 606-8502,Japan [2]Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems,South China Botanical Garden,Chinese Academy of Sciences,Guangzhou 510650,Guangdong,People’s Republic of China [3]Forestry and Forest Products Research Institute,FFPRI 1 Matsunosato,Tsukuba,Ibaraki 305-8687,Japan [4]Faculty of Forestry,Kasetsart University,Chatuchak,Bangkok 10900,Thailand [5]Smithsonian Tropical Research Institute,Bocas Town,Isla Ancón,Republic of Panama

出　　处：《Journal of Forestry Research》2023年第2期565-573,共9页林业研究（英文版）

基　　金：supported by the grant from Grant-in-Aid for JSPS Fellowes(number 25·2647)to TM;the MEXT grant-in-aid 22255002 to KK。

摘　　要：Recent reports warned that planting leguminous trees under monocultures elevates nitrous oxide(N2O)emissions through N-rich litter inputs.We hypothesized that planting trees on sandy soil can avoid the legume-derived boost of N2O emissions through limiting water availability for N2O production.Effects of planting legumes on methane(CH4)uptakes were also examined.N2O emissions and CH4uptakes were compared among five tropical tree plantation stands including three leguminous stands(Acacia auriculiformis,Acacia mangium,and Xylia xylocarpa)and two non-leguminous stands(Eucalyptus camaldulensis,and Hope a odorata).Due to lower water contents of the soil,the N2O fluxes in our study site were at the lower end of the tropical rain forests.As we hypothesized,no clear differences in N2O emissions were obs erved between leguminous and non-leguminous stands.CH4uptake rates in the present study were lower than those of other tropical forests.CH4uptakes in leguminous stands did not differ from those in non-leguminous stands.Overall,we demonstrated that planting leguminous trees on sandy soils has a potential to enable us to manage leguminous monoculture tree plantations without boosting N2O emissions or reducing CH4uptakes.

关 键 词：Nitrous oxide Methane Fast-growing trees Tropical forest Soil texture 

分 类 号：S718.5[农业科学—林学]