毛乌素沙地不同植被类型的土壤颗粒分形与土壤碳氮变化特征

发布时间：2018-01-09 12:17

本文关键词：毛乌素沙地不同植被类型的土壤颗粒分形与土壤碳氮变化特征　出处：《东北林业大学学报》2016年08期 　论文类型：期刊论文

【摘要】：为了探讨不同植被类型的土壤碳氮特征,测定了毛乌素沙地不同植被群落土壤0~10、10~20和20~60 cm土层土壤有机质、全氮及土壤颗粒组成的动态变化,并分析了土壤颗粒组成中沙粒、极细沙和黏粉粒质量分数变化与土壤有机质和全氮质量分数间的关系。结果表明,固沙植被的建植显著提高土壤有机质和全氮质量分数,而不同植被类型对土壤有机质和全氮质量分数的影响差异主要发生在土壤表层(0~10 cm),深层差异不显著。而同一植被类型土壤有机质和全氮质量分数随土层加深呈下降趋势,表现出垂直方向的变异。其中樟子松样地对表层土壤有机质和全氮质量分数含量影响最大,具有明显表聚性,随土层加深土壤有机质和全氮质量分数含量下降最为显著,而沙柳+油蒿+杨柴样地和沙地柏+油蒿样地土壤有机质、全氮质量分数随土层加深无显著变化。固沙植被的建植显著提高土壤黏粉粒(0.05 mm)和极细沙(0.05~0.10 mm)质量分数,而显著降低了沙粒质量分数(0.1~1.0 mm),不同植被类型样地各层土壤极细沙和黏粉粒质量分数由大到小依次为樟子松样地、沙地柏油蒿样地、沙柳油蒿杨柴样地,而沙粒质量分数与之相反。同一植被类型样地,随土层加深沙粒平均质量分数均呈增加趋势,极细沙和黏粉粒质量分数则呈降低趋势。土壤颗粒组成与土壤有机质、全氮质量分数间相关性表明,土壤中黏粉粒和极细沙粒质量分数分别与土壤有机质和全氮质量分数呈显著正相关,而沙粒质量分数却与土壤有机质和全氮质量分数呈显著负相关(p0.01)。
[Abstract]:In order to study the characteristics of soil carbon and nitrogen in different vegetation types, different vegetation communities in Maowusu sandy land soil 0~10,10~20 and 20~60 cm soil organic matter was determined, the dynamic changes of total nitrogen and soil particle composition, and analyzed the composition of soil particles in sand, very fine sand and clay particle content and the change of soil organic matter and total nitrogen content. The relationship between plant construction. The results show that the sand fixing vegetation significantly increased soil organic matter and total nitrogen content, and the effects of different vegetation types on soil organic matter and total nitrogen content differences occurred mainly in the soil surface (0~10 cm), the difference was not significant. The deep and the same vegetation types, soil organic matter and total nitrogen mass fraction soil depth decreased, showing variation in the vertical direction. Which kind of Pinus sylvestris on surface soil organic matter and total nitrogen content has the greatest impact, Ming Significant surface accumulation, with depth of soil organic matter and total nitrogen content decreased most significantly, and Salix + Artemisia ordosica + Hedysarum mongolicum samples and Sabina vulgaris + Artemisia ordosica to soil organic matter, total nitrogen content increased with soil depth. No significant changes in plant construction sand fixing vegetation significantly increased soil clay particle (0.05) and mm (0.05~0.10 mm) very fine sand mass fraction, and significantly reduced the sand mass fraction (0.1~1.0, mm) of different types of vegetation plots in different soil layer of fine sand and clay particle content followed by Pinus sylvestris plots, tar sand Artemisia plots, Salix ordosica Hedysarum mongolicum plots. And the sand content on the contrary. The same vegetation types, with depth of sand mass fraction increased, very fine sand and clay silt mass fraction decreased. Soil particle composition and soil organic matter, total nitrogen mass fraction showed that the correlation between, The mass fraction of clay and fine sand was positively correlated with soil organic matter and total nitrogen content, while the sand mass fraction was negatively correlated with soil organic matter and total nitrogen content (P0.01).

【作者单位】：内蒙古林业科学研究院;
【基金】：林业科技创新平台项目(2015-ZYPT-DW-039)
【分类号】：S151.9
【正文快照】： 1)林业科技创新平台项目(2015-ZYPT-DW-039)。nmg.dyx@163.com。Characteristic of Soil Particle Size Distribution and Soil Organic Carbon and Nitrogen Dynamics of Different Veg-etation Types in the Mu Us Sandy Land//Zhang Lixin,Duan Yuxi,Wang Weifeng,Wang Bo,

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