globalchange  > 气候变化与战略
CSCD记录号: CSCD:5565559
论文题名:
北亚热带红壤丘陵区3种土地利用方式下CH_4通量及其影响因素
其他题名: CH_4 Fluxes and Its Influence Factors under Three Land Use Type in the Hilly Red Soil Region of Northern Subtropical, China
作者: 田亚男1; 聂文婷2; 张水清1; 吕昭琪1; 殷欣1; 林杉1
刊名: 生态环境学报
ISSN: 1674-5906
出版年: 2015
卷: 24, 期:9, 页码:156-162
语种: 中文
中文关键词: 甲烷通量 ; 菜地 ; 茶园 ; 红壤丘陵区
英文关键词: CH_4 flux ; vegetable field ; tea field ; hilly red soil region
WOS学科分类: ENVIRONMENTAL SCIENCES
WOS研究方向: Environmental Sciences & Ecology
中文摘要: 以北亚热带红壤丘陵区林地、茶园、菜地为对象,采用静态箱-气相色谱法,对3种土地利用方式下CH_4通量进行了研究,同时测定了土壤温度、含水量和无机氮含量。旨在探索不同土地利用方式下CH_4源和汇的功能,对评估不同土地利用方式对全球气候变化的贡献具有重要意义。结果表明,不同土地利用方式下土壤甲烷平均通量有显著差异,分别为:林地-15.44 mug·m~(-2)·h~(-1),茶园-1.49 mug·m~(-2)·h~(-1),菜地7.11 mug·m~(-2)·h~(-1);菜地土壤甲烷平均通量最高,茶园其次,林地最低,CH_4年累积通量分别为0.52、-0.31和-1.46 kg·hm~(-2),菜地土壤以排放CH_4为主,而茶园和林地土壤是CH_4的汇。茶园和菜地土壤 CH_4通量呈一定的季节性变化,春、秋季CH_4通量较高。林地CH_4吸收通量与土壤湿度呈显著的负相关关系(P<0.05),且当土壤湿度(WFPS)高于70%时,林地土壤才以排放CH_4为主;而茶园和菜地土壤CH_4吸收通量与土壤含水量无显著相关关系。土壤CH_4通量与土壤温度之间未呈显著的相关关系。不同土地利用方式下土壤CH_4排放通量与铵态氮含量呈显著的负相关关系(P<0.05),而与硝态氮含量未呈显著的相关性。
英文摘要: CH_4 fluxes from soil under three land use types (woodland, tea field and vegetable field) were measured with static chamber-GC techniques; we also detected soil temperature, moisture and mineral nitrogen concentrations at the same time of gas sampling in the hilly red soil region of north subtropics. The purpose of the study is to explore the function of CH_4 source and "sink" in different land use patterns, is of much importance to evaluate the contribution of different land use patterns to the global climate change. Our results showed that land use types had great influence on mean CH_4 fluxes, vegetable field, tea field and woodland were 7.11, -1.49, -15.44 mug·m~(-2)·h~(-1), respectively, the highest fluxes from vegetable field, the second higher from tea field, while lowest values being observed from woodland. The annual cumulative CH_4 fluxes were 0.52, -0.31 and -1.46 kg·hm~(-2) for woodland, tea field and vegetable filed, respectively. The soil of vegetable field played a CH_4 source role, while the tea field and woodland soils were sink of CH_4 to the atmosphere as a whole. Seasonal variations of CH_4 fluxes from tea field and vegetable field soils were observed, CH_4 fluxes in spring and autumn seasons kept at relative high level, in other seasons, CH_4 fluxes were low. A significant negative relationship between soil CH_4 uptake rate and soil moisture was observed in woodland , and episodes of net CH_4 release were observed in woodland, which may be caused by high soil moisture (WFPS higher than 70%). However, soil CH_4 uptake rate and soil moisture were no correlation from tea filed and vegetable field. And no significant correlation between CH_4 fluxes and soil temperature were found from all land use types. A negative correlation between soil CH_4 emission and NH_4~+-N concentration was also observed from different land use type, while there was no significant relationship between soil CH_4 emission and NO_3~(-)-N concentration.
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/149739
Appears in Collections:气候变化与战略

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作者单位: 1.华中农业大学资源与环境学院, 农业部长江中下游耕地保育重点实验室, 武汉, 湖北 430070, 中国
2.长江科学院水土保持研究所, 武汉, 湖北 430010, 中国

Recommended Citation:
田亚男,聂文婷,张水清,等. 北亚热带红壤丘陵区3种土地利用方式下CH_4通量及其影响因素[J]. 生态环境学报,2015-01-01,24(9):156-162
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