评估埃塞俄比亚上阿瓦士盆地水土保持干预措施的有效性

Alebachew Shumye Moges, Sisay Assefa Wondimagegn, Yitea Seneshaw Getahun
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摘要

埃塞俄比亚中部高原正面临着土地退化导致土壤理化性质发生变化的重大挑战。本研究旨在评估不同保护方法在提高土壤理化性质、减少土壤流失和侵蚀以及最大限度提高肯塞塔流域安科伯尔地区土地生产力方面的有效性。本研究采用两种土地用途(水土保持和非水土保持土地)、三个坡位和三个重复,土壤深度为 0-30 厘米,用于未扰动和扰动土壤样本的数据收集和分析。调查数据是从 106 个随机抽取的受访家庭中收集和评估的。结果表明,保护地和非保护地的土壤物理特性(容重、土壤水分含量、土壤质地)平均值存在明显差异。化学特性(包括 pH 值、EC 值、exK 值、CEC 值、OC 值、OM 值和可利用磷)在不同土地管理类型和坡度位置之间也有显著变化(p < 0.05)。采用石面土埂管理的土壤在土壤理化性质方面有明显改善。结果在统计学上差异显著(p < 0.05)。大多数受访家庭解释说,在研究地区采用水土保持措施后,土壤流失和土壤侵蚀率下降,土地生产力提高。因此,适当的水土保持措施对于最大限度地降低土壤流失率、改善土壤的物理和化学性质以及提高土地生产力至关重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evaluate the effectiveness of soil and water conservation interventions in the upper Awash Basin, Ethiopia
The central highland of Ethiopia is facing significant challenges due to land degradation, which resulted in changes to the soil's physicochemical properties. This study aims to assess the effectiveness of different conservation methods in enhancing soil physicochemical properties, reducing soil loss and erosion, and maximizing land productivity in Ankober District of Kenseta watershed. For this study, two land uses (conserved and non‐conserved land), three slope positions, and three replication with the soil depth of 0–30 cm were used for undisturbed and disturbed soil samples data collection and analysis. The survey data were collected and evaluated from 106 randomly selecting respondents' households. The results showed significant variation in the mean value of soil physical properties (bulk density, soil moisture content, soil texture) within and between conserved and non‐conserved land. The chemical properties, including pH, EC, exK, CEC, OC, OM, and available P, also changed significant across land management types and along slope position (p < 0.05). Soil managed with stone face soil bund demonstrated significant improvement in soil physicochemical properties. The results were statistically significant difference at (p < 0.05) level of significance. Majority of the respondents' households explained the soil loss and rate of soil erosion were declined and land productivity status increased after the adoption of soil and water conservation practices in the study area. Therefore, proper conservation practices are vital in minimizing the rate of soil loss, ameliorating physical and chemical properties of the soils, and enhancing land productivity.
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