干旱区生态环境知识资源中心(Arid): 苔藓生物结皮层腐殖质组成变化特征研究

Arid

	苔藓生物结皮层腐殖质组成变化特征研究
其他题名	Characteristics of humus composition in crusts of bryophytes
	闫德仁; 张胜男; 吴振廷
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2019
卷号	42 期号:6
中文摘要	腐殖质组成是表征土壤化学性质的主要指标之一,在某种程度对评价风沙土的发育过程具有意义。采集了不同气候区沙地沙漠苔藓生物结皮层样品,采用重铬酸钾容量法和光密度法测定了苔藓结皮层腐殖质组成含量和胡敏酸吸光特性。结果表明:随着干燥指数的增加,苔藓结皮层有机质含量由14.93 g·kg~(-1)降低到9.89 g·kg~(-1),腐殖酸总量由5.1 g·kg~(-1)降低到2.0 g·kg~(-1),胡敏酸含量由2.9 g·kg~(-1)降低到0.7 g·kg~(-1),富里酸含量由2.2 g·kg~(-1)降低到1.3 g·kg~(-1),胡敏酸与富里酸比值(HA/FA)由1.32降低到0.54,E4/E6比值则由4.28增加到5.83。苔藓结皮层腐殖质组成含量及胡敏酸吸光特性具有地带性变化趋势,并影响着生物结皮层及流动风沙土的发育演变过程。
英文摘要	Humus composition is one of the basic characteristics of soil,which has important guiding significance for the evaluation of soil formation and evolution process.In this paper, the samples of bryophyte crust layers from sandy deserts in different climatic regions of Inner Mongolia,China were collected.The content of humus composition of bryophyte crust layers and the light absorption properties of humic acid were determined by potassium dichromate volumetric method and optical density method.The results showed that with the increase in the dryness index,bryophyte crust organic matter content was reduced from 14.93 to 9.89 g·kg~(-1), total humic acid content was reduced from 5.1 to 2.0 g·kg~(-1),humic acid content was reduced from 2.9 to 0.7 g·kg~(-1), folic acid content was reduced from 2.2 to 1.3 g·kg~(-1),HA/FA ratio was reduced from 1.32 to 0.45,and E4/E6 ratio was increased from 4.28 to 5.83.The content of humus in bryophyte crust and the light absorption properties of humic acid have a zonal trend,and it influences the development and evolution of biological crusts and aeolian sandy soils.
中文关键词	苔藓生物结皮 ; 沙漠 ; 有机质 ; 腐殖质组成 ; 地带性特征
英文关键词	bryophyte crust layers desert organic matter humus composition zonality trend
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6697566
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353234
作者单位	闫德仁, 内蒙古林业科学研究院, 呼和浩特, 内蒙古 010010, 中国. 张胜男, 内蒙古林业科学研究院, 呼和浩特, 内蒙古 010010, 中国. 吴振廷, 内蒙古林业科学研究院, 呼和浩特, 内蒙古 010010, 中国.
推荐引用方式 GB/T 7714	闫德仁,张胜男,吴振廷. 苔藓生物结皮层腐殖质组成变化特征研究[J],2019,42(6).
APA	闫德仁,张胜男,&吴振廷.(2019).苔藓生物结皮层腐殖质组成变化特征研究.干旱区地理,42(6).
MLA	闫德仁,et al."苔藓生物结皮层腐殖质组成变化特征研究".干旱区地理 42.6(2019).