藏东南色季拉山不同森林类型土壤CO2排放

doi:10.3969/j.issn.1004-1524.2017.10.20

浙江农业学报 ›› 2017, Vol. 29 ›› Issue (10): 1733-1741.DOI: 10.3969/j.issn.1004-1524.2017.10.20

藏东南色季拉山不同森林类型土壤CO₂排放

杨红^{1, 2}, 曹舰艇², 徐唱唱¹, 郭丰磊¹

1.西藏农牧学院西藏高原气候变化与土壤圈物质循环研究中心,西藏林芝 860000;
2.西藏农牧学院高原生态研究所,西藏林芝 860000

收稿日期:2017-04-11 出版日期:2017-10-20 发布日期:2017-12-05
作者简介:杨红(1991-),男,藏族,甘肃甘南藏族自治州人,硕士研究生,研究方向为高原(高山)生态系统生态。E-mail: hyang2016@163.com
基金资助:
国家自然基金项目(41461055,41561052); 西藏农牧学院“雪域英才工程”人才发展支持计划项目(XYYC2015-16); 研究生创新项目计划(YJS2016-7)

Soil CO₂ emission of different forest types in Sejila Mountains, southeast of Tibet

YANG Hong^{1, 2}, CAO Jianting², XU Changchang¹, GUO Fenglei¹

1. Research Center of Climate Change and Material Cycle of Pedosphere of Tibet Plateau, Xizang Agriculture and Animal Husbandry College, Linzhi 860000, China;
2. Ecological Research Institute of Tibet Plateau, Xizang Agriculture and Animal Husbandry College, Linzhi 860000, China

Received:2017-04-11 Online:2017-10-20 Published:2017-12-05

摘要/Abstract

摘要： 为阐明不同森林类型土壤碳排放变化特征及O层土壤对土壤碳排放的贡献,以藏东南色季拉山主要类型森林(冷杉、杜鹃、高山栎、云杉)为研究对象,设置移除和保留O层处理,分别测定其土壤碳排放量。结果表明:(1)供试的4种森林土壤均呈酸性(pH<6.0),且随着土壤层次的加深pH值逐渐增大;(2)土壤温、湿度变化具有单峰型日变化特征,最大值均出现在12:00—14:00,最小值出现在8:00—9:00;日变化尺度上,土壤CO₂排放速率同样表现为单峰型日变化特征,4种森林类型土壤CO₂排放速率均表现为保留O层>移除O层>O层,不同处理土壤CO₂排放速率之间差异达极显著水平(P<0.01);不同森林类型土壤累计碳通量变化特征与土壤CO₂排放速率变化规律基本一致。

关键词: 色季拉山, 森林土壤, 碳排放速率, 累计碳通量

Abstract: In order to elucidate the characteristics of soil carbon emission in different forest types and effects of O layer soil on soil carbon emission, treatments removed and retained O layer were set up, and the carbon emissions of the main types of forest (fir, rhododendron, alpine oak, spruce) in the Sejila mountains in southeastern of Tibet were measured, respectively. The results showed that: (1)Four kinds of forest soils were acidic (pH<6.0), and the pH gradually increased with deepening of the soil; (2) Soil temperature and humidity changes had the characteristics of single peak diurnal variation, the maximum value appeared during 12:00—14:00, the minimum appears during 8:00—9:00; On diurnal variation scale, soil CO₂ emission rate also showed the diurnal variation characteristics of single peak type, and CO₂ emission rates of the four forest types were as follows: remain O layer>remove O layer>O layer, the differences of CO₂ emission rate between different treatments were extremely significant (P<0.01); The characteristics of cumulative carbon flux in different forest types were consistent with the variation of soil CO₂ emission rate.

Key words: Sejila mountain, forest soil, carbon emission rate, cumulative carbon flux

中图分类号:

S718.55

杨红, 曹舰艇, 徐唱唱, 郭丰磊. 藏东南色季拉山不同森林类型土壤CO₂排放[J]. 浙江农业学报, 2017, 29(10): 1733-1741.

YANG Hong, CAO Jianting, XU Changchang, GUO Fenglei. Soil CO₂ emission of different forest types in Sejila Mountains, southeast of Tibet[J]. , 2017, 29(10): 1733-1741.

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藏东南色季拉山不同森林类型土壤CO₂排放

Soil CO₂ emission of different forest types in Sejila Mountains, southeast of Tibet

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