毕业论文移动版

摘要研究不同林地土壤物理特性的空间异质性对于保护和恢复森林生态系统的水源涵养功能具有重要意义。本文将庐山内8种主要森林植被类型下土壤作为研究对象，对其不同土层土壤硬度、容重、孔隙度及水分进行测定分析，系统研究不同森林植被类型下土壤物理特性的空间分布特征。结果表明：（1）不同森林植被类型下土壤硬度的变化范围是12。96~26。69kg•cm-2；黄山松林下土壤容重最大，马尾松林最小；灌丛下土壤孔隙度最大，黄山松林最小；马尾松林下土壤水分含量最大，黄山松林最小。（2）土壤硬度和容重与土层深度成正相关，土壤孔隙度和水分与土层深度成负相关，并且40~60cm土层中的土壤硬度和土壤水分以及20~60cm土层中的土壤容重和土壤孔隙度的空间异质性都较高。71853

该论文图5幅，表3个，参考文献16篇。

毕业论文关键词：土壤物理特性  森林植被类型  空间异质性  庐山

The Spatial Heterogeneity of Soil Physical Properties in Lushan Different Forest Vegetation Types

Abstract The spatial heterogeneity of soil physical properties in different forest vegetation types has important value of forest ecosystem for conservation and restoration of water conservation function。 The research object is soil in the Lushan 8 kinds of main forest vegetation types, geting through the determination and analysis of the soil hardness, bulk density, porosity and water on the different layers, system to study the effects of soil physical characteristics of the space distribution in the different types of forest vegetation。 Results show:(1) The variation range of soil hardness in different forest vegetation types is 12。96~26。69kg cm-2; The largest of the soil bulk density was the Mount Huangshan pine forest, the smallest in the pinus massoniana; The soil porosity of shrub was the largest, and the Mount Huangshan pine forest was the smallest; The soil moisture content was the most in pinus massoniana, and the Mount Huangshan pine forest was the smallest。(2) Soil hardness and bulk density were positively correlated with the depth of soil layer, soil porosity and soil moisture were negatively correlated with the depth of soil layer; the soil hardness and soil moisture in the 40~60cm soil layer and the soil bulk density and soil porosity in the 20~60cm soil layer all have a high degree of spatial heterogeneity。

Key Words: soil physical properties  forest vegetation types  spatial heterogeneity Lushan 

目  录

摘要 Ⅰ

Abstract Ⅱ

目录 Ⅲ

图清单 Ⅳ

表清单 Ⅳ

1 绪论 1

1。1目的意义 1

1。2国内外研究进展 1

1。3研究思路 2

2 研究区概况 3

3 研究方法 4

3。1样地设置及野外调查 4

3。2测定方法及数据处理 4

4 结果与分析 5

4。1土壤物理特性的统计分析 5

4。2土壤物理特性的空间异质性分析 7

5 结论与讨论 10

参考文献 12

致谢 14 

图清单

图序号 (责任编辑：qin)