[1]张路路,王邵军*,张昆凤,等. 西双版纳热带森林恢复对土壤反硝化N2O排放的影响[J].西北林学院学报,2024,39(2):97-105.[doi:10.3969/j.issn.1001-7461.2024.02.13]
　ZHANG Lu-lu,WANG Shao-jun*,ZHANG Kun-feng,et al. Influence of Tropical Forest Restoration on Spatiotemporal Variations in N2O Emissions from Soil Denitrification[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2024,39(2):97-105.[doi:10.3969/j.issn.1001-7461.2024.02.13]
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 西双版纳热带森林恢复对土壤反硝化N2O排放的影响()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第39卷
期数:
2024年第2期
页码:
97-105
栏目:
出版日期:
2024-03-31

文章信息/Info

Title:
 Influence of Tropical Forest Restoration on Spatiotemporal Variations in N2O Emissions from Soil Denitrification
文章编号:
1001-7461(2024)02-0097-09
作者:
 张路路; 王邵军*; 张昆凤; 樊宇翔; 解玲玲; 肖博; 王郑钧; 郭志鹏; 郭晓飞; 罗双; 李瑞; 夏佳慧; 杨胜秋; 兰梦杰
 （西南林业大学 生态与环境学院，云南 昆明 650224）
Author(s):
 ZHANG Lu-lu; WANG Shao-jun*; ZHANG Kun-feng; FAN Yu-xiang; XIE Ling-ling; XIAO Bo; WANG Zheng-Jun; GUO Zhi-peng; GUO Xiao-fei; LUO Shuang; LI Rui; XIA Jia-hui; YANG Sheng-qiu; LAN Meng-jie
 (College of Ecology and Environment,Southwest Forestry University,Kunming 650224,Yunnan,China)
关键词:
 ; 热带森林; 次生演替; 反硝化作用; 反硝化微生物; N2O排放
Keywords:
 ; tropical forest;  secondary succession;  denitrification;  denitrifying microorganism;  N2O emission
分类号:
S714
DOI:
10.3969/j.issn.1001-7461.2024.02.13
文献标志码:
A
摘要:
 为探明热带森林恢复对土壤反硝化N2O排放时空动态的影响，选择西双版纳热带森林不同恢复阶段白背桐(Mallotus paniculatus)、崖豆藤(Mellettia leptobota)、高檐蒲桃(Syzygium oblatum)群落为研究对象，反硝化N2O排放及微生物多样性分别采用“纯氧法抑制反硝化”和高通量测序测定，并分析其与土壤化学性质之间的关联特征。结果表明，1) 热带森林恢复显著影响土壤反硝化N2O排放速率(P<0.05)，其速率均值(μg·kg-1·h-1)大小依次为高檐蒲桃(303.16±37.57) >崖豆藤(251.38±28.37)>白背桐(193.45±26.76)。2) 反硝化N2O排放速率具有显著的时空变化，季节动态表现为湿季（6月和9月）显著高于干季（3月和12月），且干湿季变幅表现为白背桐（2.94倍）>高檐蒲桃（2.50倍）>崖豆藤（2.22倍）；垂直变化随土层加深逐渐降低。3) 不同恢复阶段土壤水分、微生物生物量碳及Shannon多样性对反硝化N2O排放速率的解释量随恢复年限呈增加趋势，其大小顺序分别为：高檐蒲桃 (68.77%，70.45%，97.87%)>崖豆藤(62.54%，57.16%，96.8%)>白背桐(54.56%，46.46%，93.17%)。4) 主成分分析表明,土壤有机碳、易氧化有机碳、Shannon指数、含水率、微生物量碳是调控土壤反硝化N2O排放的主控因子，而全氮、硝态氮、铵态氮、水解氮、Chao指数、Simpson指数的贡献次之。热带森林恢复通过影响土壤反硝化微生物Shannon多样性、水分及碳库组分含量，进而调控反硝化过程的N2O排放的时空动态。
Abstract:
 This study aimed to explore the effect of tropical forest restoration on the spatiotemporal dynamics of N2O emissions from soil denitrification.The continuous indoor-culture method (pure-oxygen inhibition denitrification) and high-throughput metagenomic sequencing technology were used to determine the N2O emissions and microbial diversity in tropical forests (i.e.,Mallotus paniculatus,Mellettia leptobota,and Syzygium oblatum communities) at different restoration stages in Xishuangbanna.We also determined the linkage of denitrifying N2O emission with soil microbial diversity and chemical properties.The results showed that 1) tropical forest restoration significantly affected the N2O emissions from soil denitrification (P<0.05).The average emission rates were ranked as S.oblatum (303.16±37.57)>M.leptobota(251.38±28.37)>M.paniculatus(193.45±26.76 μg·kg-1·h-1).2) N2O emission rates of denitrification had a significant spatio-temporal variation.They were significantly higher in the wet season (June and September) than in the dry season (March and December); the range of the fluctuations in N2O emission rates from wet to dry season ranked as M.paniculatus(2.94 times)>S.oblatum(2.50 times)>M.leptobota(2.22 times); the vertical variation decreased along the soil profile.3) The explanatory order of soil water content,microbial biomass carbon and Shannon diversity for the changes of denitrifying N2O emissions at the three restoration stages was ranked as S.oblatum(68.77%,70.45%,and 97.87%)>M.leptobota(62.54%,57.16%,and 96.8%)>M.paniculatus(54.56%,46.46%,and 93.17%).4) The result of principal component analysis showed that total organic carbon,readily oxidizable carbon,Shannon index,water content,and microbial carbon were the main factors regulating the N2O emissions from denitrification.The contribution of total,nitrate,ammonium,and hydrolyzed nitrogen,Chao index,and Simpson index ranked the second.Tropical forest restoration can regulate the spatiotemporal variations in N2O emission during soil denitrification,probably through mediating denitrifying bacterial diversity,water content,and carbon pool components.

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备注/Memo

备注/Memo:
 收稿日期：2023-01-16修回日期：2023-05-26
基金项目：国家自然科学基金项目(32060281，31660191)；云南省一流学科建设项目(云转发［2022］73号)；云南省教育厅科学研究基金项目(2019Y0136)。
第一作者：张路路。研究方向：森林生态学。E-mail：luluzhang_666666@163.com
*通信作者：王邵军，博士，教授。研究方向：森林生态学。E-mail：shaojunwang2009@163.com
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