熱帯アジアにおける亜酸化窒素およびメタンの収支にマメ科樹木が及ぼす影響

热带亚洲豆科树木对一氧化二氮和甲烷预算的影响

• 批准号: 15K18712
• 负责人: 森 大喜
• 金额: $ 2.58万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2015
• 资助国家: 日本
• 起止时间: 2015-04-01 至 2016-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15K18712/
• 关键词: 窒素循環; マメ科; 亜酸化窒素; 熱帯林

マレーシア・デラマコット森林管理区の低地フタバガキ林において、マメ科樹木と非マメ科樹木の樹木直下土壌からの亜酸化窒素放出量、無機態窒素量、微生物態窒素量、溶存有機窒素量を比較したが、いずれも有意な差は見られなかった。また、マレーシア・キナバル山の標高700mに設置された調査地においても同様に無機態窒素量、微生物態窒素量、溶存有機窒素量、硝化ポテンシャル、純アンモニア化速度、純硝化速度、微生物態窒素の変化量、および溶存有機窒素の変化量を比較したが、有意差は見られなかった。これらの結果から、アジア熱帯においてはマメ科樹木が窒素循環に与える寄与は大きくないことが示唆された。このように、マメ科樹木の絶対数の小ささに加え、マメ科樹木の窒素循環への寄与の小ささが、アジア熱帯において亜酸化窒素放出量がしばしば低く報告される原因のひとつとなっていると考察した。今後は、（１）アジア熱帯におけるマメ科樹木の窒素固定量の実態を明らかにすること（２）アジア熱帯における窒素流入経路を明らかにすること（３）南米やアフリカなど他の熱帯林との窒素循環形態を比較することなどが課題となる。窒素固定量については、アセチレン還元法および窒素同位体法によって測定し、その量を明らかにするとともに他の熱帯林の値との比較を行う。窒素流入経路については、シアノバクテリアなど非マメ科の窒素固定量を明らかにする。生態系の窒素獲得をマメ科樹木に頼ることのできないアジア熱帯では、非マメ科の従属栄養窒素固定が比較的重要なのかもしれない。これら従属栄養窒素固定についても他の熱帯林との比較が必要である。研究代表者が海外勤務（学振海外特別研究員）となったため研究を続行することはできないが、本課題については少しずつ研究を進めるとともに、構想をさらに膨らませて将来の解明実現を目指し続ける。

The amount of acidification asphyxiant, the amount of organic matter, the amount of microbial nutrients, the amount of dissolved organic matter, the amount of dissolved organic matter in the forest management area, the amount of acidified asphyxiant, the amount of organic matter, the amount of asphyxiation, the amount of acidification, the amount of asphyxiation, the amount of organic matter, the amount of asphyxiant acid, the amount of asphyxiate, the amount of organic matter, the amount of asphyxiant acidification, the amount of acidified asphyxiant, the amount of organic matter, the amount of organic matter, The height of the mountain is 700m, and the height of the mountain is 700m. The amount of organic matter, the amount of microorganism, the amount of dissolved organic matter, the rate of nitrification, the rate of nitrification, the amount of asphyxiation of microorganisms, the amount of dissolved asphyxiate, the amount of dissolved asphyxia, the amount of dissolved asphyxiant, the amount of asphyxiate, the amount of asphyxia, the amount of asphyxiation, the amount of asphyxia, the amount of asphyxiation, the amount of asphyxiant, the amount of asphyxia, the amount of asphyxiate, the amount of asphyxiant, the amount of asphyxiant, the amount of asphyxi The results showed that asphyxins were sent to the department of the department to indicate that they were instigated in the first place. The amount of asphyxiated asphyxiant in the wood of the family was sent to the hospital in the same way. The amount of acidified asphyxiant was released from the department. In the future, (1) the fixed amount of asphyxiant in the department of wood was determined. (2) the flow of asphyxiant into the road. (3) the flow of asphyxiant into the road. (3) the level of asphyxiant in the forest was higher than that in the south. The fixed amount of asphyxiant was determined by the method of asphyxiant, the method of asphyxiate, the method of asphyxiation, the method of asphyxiate, the method of asphyxiant, the method of asphyxiate, the method of asphyxiate, the Asphyxiating hormone is infused into the hospital, and the fixed amount of asphyxiating hormone in the department of non-medical treatment. Asphyxiate is an important component of asphyxiant fixation, which is important for asphyxiant fixation. In the case of asphyxiant fixation, there is no need for the treatment of asphyxiation. The representative of the research team is engaged in overseas service (learning vibration overseas special research staff). The research representative is responsible for the overseas service (student vibration overseas special researcher). The research representative is responsible for the overseas service (student vibration overseas special researcher). The research representative is interested in overseas service (student vibration overseas special researcher). In this project, the overseas service (student vibration overseas special researcher) is involved in the study.

项目成果

Greenhouse gas emissions from tropical tree plantation with leguminous and non-leguminous species

豆科和非豆科热带树木种植园的温室气体排放

• 发表时间: 2015
• 作者: Taiki Mori;Chongrak Wachrinrat;Duriya Staporn;Ponthep Meunpong;Warawich Suebsai;Khitja Boonsri;Warisa Lumban;Manassawee Kuawong;Thanida Phukdee;Juruwan Srifai;Kannika Boonman;Kanehiro Kitayama
• 通讯作者: Kanehiro Kitayama