Effect of Different Land-Use Types on Soil Properties in Cheha District, South-Central Ethiopia
Effect of Different Land-Use Types on Soil Properties in Cheha District, South-Central Ethiopia
复制标题
DOI：
10.3390/su14031323
复制
发表时间：
2022-02-01
期刊：
影响因子：
3.9
通讯作者：
Wogi, Lemma
中科院分区：
文献类型：
--
作者：
Kebebew, Solomon;Bedadi, Bobe;Wogi, Lemma
在管理不善的情况下改变土地使用是埃塞俄比亚中南部土壤肥力和农业生产力下降的主要原因之一。因此，研究不同土地利用类型的土壤性质变化将对规划适当的土壤管理策略产生影响。本研究评估了埃塞俄比亚中南部切哈区土地利用类型对土壤理化性质的影响。七种土地利用类型，桉树种植园，耕地，放牧，灌木，enset（Ensete ventricosum），阿拉伯茶（Chata edulis），和天然林，被认为是在描述土壤肥力。从每种土地利用类型的3个代表性土壤采样点中随机采集21个土壤样品（0-20 cm深），并对其土壤理化性质进行分析。结果表明，不同土地利用方式对土壤有机碳、全氮、阳离子交换量、pH、铝饱和度和铁含量的影响差异显著（p < 0.05）。桉树种植园土壤的砂粒含量（23.44%）、粉粒含量（24.00%）和有效水含量（111.13 mm/m）均较低，而粘粒含量（52.56%）和容重（1.39 g cm-3）较高。与天然林相比，镶嵌土地利用类型下的土壤有机碳（2.41%），全氮（0.23%）和CEC（37.61 cmol（+）kg（-1）），其次是阿拉伯茶土地利用。相关分析表明，土壤有机碳与阳离子交换量呈极显著正相关，与土壤容重、土壤pH和铝饱和度呈显著负相关。桉树种植园，耕地，卡塔叶，和enset土地的总氮消耗56.0%，40.0%，36.0%，和8.0%，分别。相对于林地，较低的交换性钙，镁，钠含量记录在耕地利用的土壤。土壤中可提取的铁、锰和锌含量普遍较高，对作物生产没有限制作用。土地资源的集约利用和不合理的土壤管理制度可能是造成该地区不同土地利用类型土壤性质差异的主要因素。因此，有必要制定综合土壤管理做法，帮助恢复土壤养分，从而尽量减少土壤的持续退化，促进可持续农业生产力。
Land-use changes under poor management practices are among the major causes of decline in soil fertility and agricultural productivity in south-central Ethiopia. Therefore, the study of soil properties variations across land-use types will have implications for planning proper soil management strategies. This study assessed the effects of land-use types on soil physicochemical properties in the Cheha district, south-central Ethiopia. Seven land-use types, eucalyptus plantation, cultivated, grazing, shrub, enset (Ensete ventricosum), khat (Chata edulis), and natural forest, were considered in describing soil fertility. A total of 21 soil samples (0-20 cm depth) were collected randomly from three representative soil sampling plots across each land-use type and examined for their analysis of soil physicochemical properties. Results showed that land-use changes induced significant (p < 0.05) differences in the soil OC, total N, CEC, pH, aluminum saturation, and Fe among land-use types were observed. Soils under eucalyptus plantation were considerably low in the sand (23.44%), silt (24.00%), and available water content (111.13 mm/m), whereas high in clay (52.56%) content and bulk density (1.39 g cm(-3)) as compared to enset land-use type. Compared to natural forest, soils under enset land-use type were high in soil OC (2.41%), total N (0.23%), and CEC (37.61 cmol (+) kg(-1)) followed by khat land-use. Correlation analysis also showed a highly significant positive relationship between soil OC and CEC but negative with bulk density, soil pH, and aluminum saturation. Total N in eucalyptus plantation, cultivated, khat, and enset lands were depleted by 56.0%, 40.0%, 36.0%, and 8.0%, respectively. Relative to forest land, lower exchangeable Ca, Mg, and Na contents were recorded in soils of cultivated land use. The extractable Fe, Mn, and Zn contents of soils were generally high and are not limiting for crop production. The intensive exploitation of land resources and improper soil management systems in the area could be the major factors for variations in soil properties across land-use types. Therefore, there is a need to develop integrated soil management practices that could help to restore soil nutrients and thereby minimize the continuing soil degradation for sustainable agricultural productivity.