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首页> 外文期刊>South African Journal of Plant and Soil >Effect of land terracing on soil physical properties across slope positions and profile depths in medium and high altitude regions of Rwanda
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Effect of land terracing on soil physical properties across slope positions and profile depths in medium and high altitude regions of Rwanda

机译：卢旺达中高海拔地区斜坡位置和剖面深度土壤梯田对土壤物理性质的影响

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摘要

Although land terracing is promoted as a management practice for effective soil conservation in hilly areas, construction of terraces causes changes in soil properties. This study evaluated the effect of land terracing on some soil physical propertiesacross slope positions and profile depths in medium and high altitudes of eastern and north-eastern Rwanda. Soil samples were collected from top, middle and bottom slopes of four year-old terraced and non-terraced lands. Results showed that soil textures were mainly sandy clay loams. At medium altitude, silt (19.6, 18.6%) and hydraulic conductivity (237.9, 129.8 mm h 1) were significantly (p < 0.05) higher in terraced than non-terraced land, while clay (29.2, 27.8%) and total available water content (TAWC) (222.2, 201.7 mm rrr1) were higher in non-terraced than terraced land. At the high altitude, hydraulic conductivity (194.3, 124.1 mm h ') was higher in terraced than non-terraced land, while soil bulk density (1.42, 1.35 g cm-3) and TAWC (251.6, 235.3 mm rrr') were higher in non-terraced than terraced land. Terracing increased silt content and hydraulic conductivity, and slightly decreased clay and water retention capacity. These changes are important in soil water and fertility management, and therefore need to be considered when using terraced lands.
机译：虽然陆地露台被推广为丘陵地区有效土壤保护的管理实践，但梯田的建设会导致土壤性质的变化。本研究评估了土地梯田对东部和卢旺达东部中高海拔地区土壤物理特性的坡度和型材深度的影响。从四岁的梯田和非露台土地的顶部，中间和底部坡度收集土壤样品。结果表明，土壤纹理主要是桑迪粘土壤土。在中等海拔高度，淤泥（19.6,18.6％）和液压导电性（237.9,129.8 mm H 1）显着（P <0.05）比非梯田土地更高（P <0.05），而粘土（29.2,27.8％）和可用水总水内容（TAWC）（222.2，201.7 mm RRR1）在非露台的非露台较高。在高海拔地区，液压导电率（194.3,124.1mm H'）比非梯田陆地较高，而土壤堆积密度（1.42,1.35g cm-3）和Tawc（251.6,235.3mm rrr'）较高在非露台而不是露台的土地。梯田增加了淤泥含量和液压导电性，略微降低了粘土和水保留能力。这些变化在土壤水和生育管理中是重要的，因此在使用梯田的土地时需要考虑。

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