Analysis of organic acids in selected forest litters of Northeast China

编号 zgly0000301514

文献类型 期刊论文

文献题名 Analysis of organic acids in selected forest litters of Northeast China

学科分类 220.1040;森林土壤学

作者 SONGJin-feng  CUIXiao-yang 

作者单位 ForestryCollegeofNortheastForestryUniversity 

母体文献 Journal of Forestry Research;林业研究: 英文版 

年卷期 2003,14(4)

页码 285-289

年份 2003 

分类号 S714.2 

关键词 落叶松  岑树  红松  白桦  中国  东北地区  树种  有机酸  落叶 

文摘内容 Larch (Larix olgensis), Manchurian ash (Fraxinus mandshurica), Korean pine (Pinus koraiensis) and White birch (Betula platyphylla) are the major planting species in northeast China. The samples of forest litters were collected from the stands of the above 4 species in Laoyeling and Jianlagou experiment stations of Maorshan Exp. Forest Farm (45°12′-45°30′N,127°30′-127°48′E), Northeast Forestry University, in early October 2002. Quantitative analysis and qualitative analysis were carried out on the organic acids existing in freshly fallen litters (L layer) and hemi-decomposed litters (F layer) of the four forest species by using Gas Chromatogram system. A wide variety of organic acids were identified, including oxalic, malonic, fumaric,succinic, maleic, malic, citric, C16:0, C18:0, C18:1, C18:2, C18:3 and C20:0 acids. In respect of L litters of all samples, the oxalic acid content (over 30 mg/g) was the highest of the seven low-molecular-weight organic acids identified, while the content of oleic or linoleic (above 40 mg/g) was found to be highest among the six high aliphatic acids identified. As to F litters, oxalic acid content was also the highest, followed by linoleic and oleic. For the same tree species or the same forest, the kinds and contents of organic acids in L litters were more abundant than that in F litters。