Soils Under Different Forest Types in the Dry Evergreen Forest Zone of Cambodia: Morphology, Physicochemical Properties, and Classification
Soils Under Different Forest Types in the Dry Evergreen Forest Zone of Cambodia: Morphology, Physicochemical Properties, and Classification
复制标题
柬埔寨干燥常绿林区不同森林类型的土壤：形态、理化性质和分类
DOI：
10.1007/978-4-431-46503-4_22
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
S. Pol
中科院分区：
文献类型：
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作者：
Jumpei Toriyama;S. Ohta;M. Araki;M. Kanzaki;Saret Khorn;Phearak Pith;Sopheap Lim;S. Pol
研究了三种不同森林类型下土壤的形态和理化性质，在柬埔寨甘榜通省的干燥万年青林区，干燥常绿林（DEF）、干燥落叶林（DDF）和常绿落叶混交林（MF）。不同林型土壤的形态特征存在差异。研究区土壤的物理性质与土壤质地密切相关。粘粒含量在DEF土壤中明显高于DDF或MF土壤。除表层外，堆积密度普遍较高（1.27-1.92）。在DDF和MF土壤中，分别在100-200 cm和160-200 cm深度处特别高。土壤总孔隙度为0.32-0.44（m3 m −3），表层除外，DEF土壤的孔隙度略高。DEF土壤的特征是细孔（小于−49 kPa）的百分比高于其他孔隙类别。DDF土壤的特征是粗孔（0至−0.2 kPa;毛细饱和点）、中孔（−0.2至−4.9 kPa）和小孔（−4.9至−49 kPa）的百分比逐渐减少，细孔随着深度的增加而增加。在MF土壤中，小孔隙的比例略有下降，随着深度。土壤阳离子交换量（CEC）和交换性阳离子（ECEC）普遍较差。ECEC和CEC与粘粒含量密切相关。交换性Ca ~（2+）、Mg ~（2+）和K ~+的储量在DEF土壤中大于DDF土壤。DDF土壤的pH值（H2O）在0-50 cm深度上明显高于其他土壤类型，且在垂直方向上呈现不同的变化规律。0-70 cm土层全碳储量以微耕土壤最高。
We studied the morphology and physicochemical properties of soils under three different types of forest, i.e., dry evergreen forest (DEF), dry deciduous forest (DDF), and mixed forest with evergreen and deciduous trees (MF), in the dry evergreen forest zone of Kampong Thom Province, Cambodia. The morphological features of soils varied among the three different forest types. The physical characteristics of the soils in the study area were strongly correlated with soil texture. Clay content was clearly higher in DEF soils than in the DDF or MF soils. Bulk density was generally high (1.27–1.92), except in the surface horizons. It was especially high at depths of 100–200 cm and 160–200 cm in the DDF and MF soils, respectively. Total soil porosity was 0.32–0.44 (m3m−3), except in the surface horizons, and was slightly higher in DEF soils. The DEF soils were characterized by a higher percentage of fine pores (less than −49 kPa) than the other pore classes. DDF soils were characterized by decreasing percentages of coarse pores (0 to −0.2 kPa; the point of capillary saturation), medium pores (−0.2 to −4.9 kPa), and small pores (−4.9 to −49 kPa), and by a concomitant increase in fine pores with depth. In MF soils, the proportion of small pores slightly decreased with depth. The soils were generally poor in cation-exchange capacity (CEC) and exchangeable cations (ECEC). ECEC and CEC were closely related to clay content. The stock of exchangeable Ca2+, Mg2+, and K+was larger in DEF soils than in DDF soils. The pH (H2O) of DDF soils was clearly higher than that of the other soil types at 0–50 cm in depth and showed different patterns in vertical changes. The stock of total carbon at 0–70 cm in depth was highest in MF soils.
DOI：
10.1007/978-4-431-46503-4
发表时间：
2007
期刊：
--
影响因子：
--
作者：
H. Sawada;M. Araki;N. Chappell;J. Lafrankie;A. Shimizu
通讯作者：
H. Sawada;M. Araki;N. Chappell;J. Lafrankie;A. Shimizu