艾比湖湿地土壤有机碳及储量空间分布特征

发布时间：2017-12-31 07:18

本文关键词：艾比湖湿地土壤有机碳及储量空间分布特征　出处：《生态学报》2016年18期 　论文类型：期刊论文

【摘要】：土壤碳储量的研究是全球碳循环研究的热点,土壤碳库的变化对全球气候变暖、维护生态平衡都有着重要的意义。新疆的艾比湖湿地是干旱区典型的盐湖湿地,为探明该湿地有机碳特性及储量,选择艾比湖湿地1m深度的土壤作为研究对象,测试有机碳含量后,对艾比湖湿地土壤有机碳特性进行分析并分层定量测算有机碳储量,结果显示:(1)艾比湖湿地土壤有机碳整体偏低,随土层加深,含量依次递减的规律比较显著。湿地7种不同植被覆盖类型的土壤有机碳含量垂直空间变异性差异明显,其中荒漠河岸林、盐化草甸、小乔木荒漠大多属于强变异,而其它植被覆盖的土壤类型多属于中等变异。(2)艾比湖湿地7种不同植被类型土壤有机碳含量在相同土层的分布特征为:有机碳集中分布在浅表层(0—20 cm),从40 cm以下变幅缓慢,分布较为均匀。不同植被类型土壤有机碳在不同土层的分配比例差异比较明显,但表层(0—20 cm)大多占到30%以上。(3)艾比湖湿地土壤有机碳储量排序依次为小乔木荒漠盐化草甸干涸湖底灌木荒漠盐生灌丛荒漠河岸林寒湿性针叶林。湿地有机碳蓄积总量为7086862.83 kgC。上述研究结果可为新疆干旱区湿地生态系统恢复、保护与科学管理提供科技支撑。
[Abstract]:Study on soil carbon storage is the hotspot of the global carbon cycle, the change of soil carbon pool to the global warming, are of great significance to maintain the ecological balance. Xinjiang Ebinur Lake Wetland in Saline Lake wetland is a typical arid region, to explore the characteristics of organic carbon and reserve of the Ebinur Lake Wetland wetland, select 1m depth of soil as the research object, test the content of organic carbon, to analyze the characteristics of Ebinur Lake wetland soil organic carbon and the hierarchical quantitative estimation of organic carbon storage, results showed that: (1) the Ebinur Lake wetland soil organic carbon is low, with the increase of soil depth and content, decreasing regularity is obvious. 7 kinds of vertical space variation of wetland soil the organic carbon content of different types of different vegetation cover significantly, the desert riparian forest meadow, desert, small trees mostly belong to strong variation, and other soil types of vegetation cover belongs to the secondary variable Different. (2) the Ebinur Lake Wetland in 7 soils of different vegetation types in organic carbon content distribution in the same soil layer for organic carbon concentration distribution in the shallow layer (0 - 20 cm), from the 40 cm amplitude slow, uniform distribution of soil organic carbon in different vegetation types. The difference in distribution proportion in different layer comparison obviously, but the surface layer (0 - 20 cm) are accounted for more than 30%. (3) the soil organic carbon storage in Ebinur Lake Wetland AI is in the order of small trees in desert meadow dry lakebed shrub desert salt shrub desert riparian forest Alpine coniferous forest. Wetland organic carbon accumulation was 7086862.83 kgC. the results of the study can be restored to wetland arid area of Xinjiang ecosystem, to provide scientific and technological support protection and scientific management.

【作者单位】：新疆师范大学地理科学与旅游学院;
【正文快照】： 陆地生态系统碳循环是全球碳循环中的重要环节,在全球气候变化中扮演着重要角色[1]。湿地是碳的储存库,碳库的变化对全球气候变暖、维护湿地生态平衡有着及其重要的意义。关于湿地碳蓄积量的研究,国外学者做了很多[2-6]。土壤有机碳含量的估算研究主要集中在土壤上层1m以内的

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