Soil organic carbon stock in Abune Yosef afroalpine and sub-afroalpine vegetation,northern Ethiopia

作     者：Kflay Gebrehiwot Temesgen Desalegn Zerihun Woldu Sebsebe Demissew Ermias Teferi 

作者机构：Department of Plant BiologyAddis Ababa UniversityP.O.Box 3434Addis AbabaEthiopia Department of BiologySamara UniversitySemeraAfarEthiopia Holetta Agricultural research CenterHolettaEthiopia Center for Environmental and Developmental StudiesAddis Ababa UniversityAddis AbabaEthiopia 

出 版 物：《Ecological Processes》 (生态过程（英文）)

年 卷 期：2018年第7卷第1期

页      面：56-64页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：Addis Ababa University  AAU 

主　　题：Abune Yosef Afroalpine and sub-afroalpine vegetation Altitude gradient Correlation Organic carbon stock Vegetation type 

摘      要：Introduction:Soil is the major reservoir of organic *** is a paucity of soil organic carbon(SOC)stock data of afroalpine and sub-afroalpine vegetation in ***,this study was conducted to estimate the SOC stock and correlate it with soil physicochemical properties in Abune Yosef afroalpine and sub-afroalpine *** sampling was employed to collect soil samples from upper 30 *** bulk density soil pH(1:2.5 water);organic carbon(Walkley and Black),and total nitrogen(Kjeldahl)were the methods used for soil *** correlation and linear regression analysis were performed in SPSS 24 statistical ***:The SOC stock of the study area was found to be 79.57 t C ha−*** organic carbon stock showed statistically significant positive correlation with vegetation type(r=0.522,p0.01),bulk density(r=0.62,p0.01),total nitrogen(r=0.41,p0.01),and altitude(r=0.468,p0.01)and negative correlation with slope(r=−0.298,p0.05).The present study revealed similar soil organic carbon stock(SOCS)with the Intergovernmental Panel on Climate Change(IPCC)default estimate for similar *** correlation of SOCS and altitude could be resulted from the variations in anthropogenic disturbances,temperature,and precipitation vegetation *** negative correlation between SOCS and slope is the result from the predictably higher soil erosion at steeper *** livestock trampling increased the bulk density but never affected the SOCS to *** did not show any significant relationship with SOCS due to either the under surveying of all aspects or similar solar radiation found in the study ***,gazing,aspect,and soil pH did not show statistically significant impact on ***:The SOCS of Abune Yosef afroalpine and sub-afroalpine vegetation is similar to the IPCC default estimate for similar *** is a great contribution both to the global and local terrestrial carbon sink.