| Distribution of soil physical properties in forest of Liupan Mountains |
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| DOI：10.16302/j.cnki.1000-7601.2015.01.010 |
| Key Words: Liupan Mountains elevation forest types soil physical properties soil organic matter |
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| Abstract: |
| The objectives of this study were to explore the distribution of soil physical properties and their influencing factors in forest of the Liupan Mountains. The distribution of major soil properties in forest of Liupan Mountains, and the relationships between soil physical properties, elevation and forest species were studied. Additionally, the relationships among soil physical properties were analyzed. The results showed that the contents of organic matter and saturated hydraulic conductivity were significantly higher in soils under broadleaf forest than those under conifer forest, but the bulk density was lower in soils under broadleaf forest than that under conifer forest. The organic matter content and saturated hydraulic conductivity in broadleaf forest were 27.7% and 21.2% higher in 0～10 cm and 10～20 cm depth, and 38% and 42.2% higher in 0～10 cm and 10～20 cm depth, respectively, than those in conifer forest. However, the soil bulk densities under broadleaf forest in 0～10 cm and 10～20 cm depth were 13.8% and 7.6% lower than those under conifer forest, respectively. Further, organic matter content was relatively higher, while bulk density was relatively lower in soils at higher elevation than those in lower elevation conditions. Besides the saturated hydraulic conductivity was not affected by elevation conditions. The mean values of MWD and GMD through 0～20 cm depth were 3.46% and 5.21% higher in broadleaf soils than conifer soils, respectively. But they were unaffected by elevation conditions. Correlation analysis revealed that the amount of macroaggregate was signifcantly positively correlated with saturated hydraulic conductivity. This finding indicated that the physical properties of soils under broadleaf forest were better than those under conifer forest in the Liupan Mountain region by the increasing amount of macroaggregate. |
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