Effects of cropland abandonment and afforestation on soil redistribution in a small Mediterranean mountain catchment  

作　　者：Makki Khorchani Leticia Gaspar Estela Nadal-Romero Jose Arnaez Teodoro Lasanta Ana Navas 

机构地区：[1]Instituto Pirenaico de Ecologia(IPE,CSIC),Campus de Aula Dei,Avda.Montanana,1005,50059,Zaragoza,Spain [2]School of Natural Resources,University of Nebraska-Lincoln,Lincoln,NE,USA [3]Estacion Experimental Aula Dei(EEAD,CSIC),Campus de Aula Dei,Avda.Montanana,1005,50059,Zaragoza,Spain [4]University of La Rioja,DCH,Physical Geography,Logronio,Spain

出　　处：《International Soil and Water Conservation Research》2023年第2期339-352,共14页国际水土保持研究（英文）

基　　金：supported by the ESPAS and MANMOUNT projects(CGL2015-65569-R and PID2019-105983RB-100/AEI/10.13039/501100011033);the MINEC0-FEDER and MICINN-FEDER)and the RednutSOIL project(PID2019-104857RBI00/AEI/10.13039/501100011033);the MICINN-FEDER;The“Geoenvironmental Processes and Global Change"(E02_17E)research group is financed by the Aragon Government and the European Social Fund(ESF-FSE).

摘　　要：In slopes of Mediterranean mid-mountain areas,land use and land cover changes linked to the aban-donment of cropland activity affect soil quality and degradation and soil redistribution;however,limited attention has been paid to this issue at catchment scale.This paper evaluates the effects of cropland abandonment and post-land abandonment management(through natural revegetation and afforesta-tion)on soil redistribution rates using fallout ^(137)Cs measurements in the Araguás catchment(0.45 km^(2),Central Spanish Pyrenees).A total of 52 soil core samples,distributed in a regular grid,from the first 30-40 cm and 9 sectioned reference samples were collected across the catchment and soil properties were analysed.Fallout ^(137)Cs was measured in a 5 cm sectioned references samples and in bulk grid samples.^(137)Cs inventories were used to estimate soil erosion and deposition rates across the catchment.Results show that the highest erosion rates were recorded under sparsely vegetated sites in the badland area,while the lowest rates were found in the afforested area,but no significant differences were observed between the different uses and covers in soil redistribution rates likely due to a long history of human intervention through cultivation in steep slopes and afforestation practices.However,the recovery of the soil organic matter in afforested areas suggest that afforestation can reduce soil degradation at long-term scale.The information gained achieve a better understanding of soil redistribution dynamics and provide knowledge for effective land management after cropland abandonment of agroecosystems in Mediter-ranean mountain areas.

关 键 词：Land use and land cover changes Caesium 137 Erosion and deposition rates AFFORESTATION Mediterranean mountain areas 

分 类 号：S157[农业科学—土壤学]