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首页> 外文期刊>International journal of soil science >Variation in Some Physical Properties of Soils Formed on a Hilly Terrain under Different Land use Types in Nigerian Savanna
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Variation in Some Physical Properties of Soils Formed on a Hilly Terrain under Different Land use Types in Nigerian Savanna

机译：尼日利亚大草原上不同土地利用类型下丘陵地形形成的土壤某些物理性质的变化

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Physical properties of soils formed on a hilly terrain were investigated in three identified landscape positions (upper, middle and lower positions) under two land use types (Fallowed and Cultivated land). Three soil profile pits were dug randomly in each landscape position, described and samples were taken from each horizon for laboratory analysis. SAS 8.2 and SPSS 16.0 were used to analize data. Mostely in detail showed significant differences in soil properties among the land use types, landscape positions (except in clay dispersion index) and pedons. Fallowed compared to continuously cultivated land got significantly higher values of silt and clay, organic carbon, aggregate stability indices, pore size classes and water retention capacities. Significantly (p<0.0001) higher sand fraction, macroaggregate stability, BD and lower water retention capacities were recorded at the upper landscape position compared to the other positions. The lower landscape position compared to the other positions got significantly (p<0.0001) higher silt and clay fractions, microaggregate stability indices, porosity, OC and water retention characteristics. The epipedons compared to the endopedons of the soils had significantly (p<0.0001) higher organic carbon, aggregate stability indices, pore size classe and moisture retention at various capacities. Of the three factors, the distribution of pore size classes (except macroporosity), BD and water retained at various capacities were to a greater extent influenced by changes in landscape positions whereas the distribution of OC and aggregate stability of the soils were more dependant on changes in land use.
机译：在两种土地利用类型（休耕地和耕地）下，在三个确定的景观位置（上部，中部和下部）调查了丘陵地形上形成的土壤的物理性质。在每个景观位置随机挖出三个土壤剖面坑，进行描述并从每个地平线上采集样本进行实验室分析。 SAS 8.2和SPSS 16.0用于分析数据。多数情况下，详细地显示出土地利用类型，景观位置（粘土分散指数除外）和and之间的土壤特性存在显着差异。与连续耕种的土地相比，休耕地的淤泥和粘土，有机碳，骨料稳定性指数，孔径等级和保水能力明显更高。与其他位置相比，在较高的景观位置记录到显着（p <0.0001）较高的砂粒分数，宏观骨料稳定性，BD和较低的保水能力。与其他位置相比，较低的景观位置具有显着（p <0.0001）更高的粉砂和粘土分数，微骨料稳定性指标，孔隙率，OC和保水特性。与土壤内含物相比，表皮在各种容量下具有显着（p <0.0001）较高的有机碳，聚集体稳定性指数，孔径分类和水分保持力。在这三个因素中，孔隙大小类别（大孔隙度除外），BD和保留在不同容量下的水分的分布在很大程度上受景观位置变化的影响，而OC的分布和土壤团聚体的稳定性更多地取决于变化在土地上

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