肯尼亚东Mau森林保护区土壤有机碳和全氮储量建模与制图（英文）

编号 zgly0001584303

文献类型 期刊论文

文献题名 肯尼亚东Mau森林保护区土壤有机碳和全氮储量建模与制图（英文）

作者 KennedyWERE  BalRamSINGH  ?ysteinBjarneDICK 

作者单位 DepartmentofMathematicalSciencesandTechnology  NorwegianUniversityofLifeSciences  KenyaAgriculturalandLivestockResearchOrganisation  KenyaSoilSurvey  DepartmentofEnvironmentalSciences  NorwegianUniversityofLifeSciences 

母体文献 Journal of Geographical Sciences 

年卷期 2016年01期

年份 2016 

分类号 S714 

关键词 soilorganiccarbon  totalnitrogen  carbonsequestration  climatechange  digitalsoilmapping  EasternMau 

文摘内容 Detailed knowledge about the estimates and spatial patterns of soil organic carbon(SOC) and total nitrogen(TN) stocks is fundamental for sustainable land management and climate change mitigation.This study aimed at:(1) mapping the spatial patterns,and(2) quantifying SOC and TN stocks to 30 cm depth in the Eastern Mau Forest Reserve using field,remote sensing,geographical information systems(GIS),and statistical modelling approaches.This is a critical ecosystem offering essential services,but its sustainability is threatened by deforestation and degradation.Results revealed that elevation,silt content,TN concentration,and Landsat 8 Operational Land Imager band 11 explained 72% of the variability in SOC stocks,while the same factors(except silt content) explained 71% of the variability in TN stocks.The results further showed that soil properties,particularly TN and SOC concentrations,were more important than that other environmental factors in controlling the observed patterns of SOC and TN stocks,respectively.Forests stored the highest amounts of SOC and TN(3.78 Tg C and 0.38 Tg N) followed by croplands(2.46 Tg C and 0.25 Tg N) and grasslands(0.57 Tg C and 0.06 Tg N).Overall,the Eastern Mau Forest Reserve stored approximately 6.81 Tg C and 0.69 Tg N.The highest estimates of SOC and TN stocks(hotspots) occurred on the western and northwestern parts where forests dominated,while the lowest estimates(coldspots) occurred on the eastern side where croplands had been established.Therefore,the hotspots need policies that promote conservation,while the coldspots need those that support accumulation of SOC and TN stocks.