Bulk density of mineral and organic soils in the Canada’s arctic and sub-arctic
作者机构：American International University-BangladeshKemal Ataturk AvenueH 58/BR 21BananiDhaka 1213Bangladesh Canada Center for Mapping and Earth ObservationNatural Resources Canada560 Rochester StreetOttawaON K1S 4M2Canada
出 版 物：《Information Processing in Agriculture》 (农业信息处理（英文）)
年 卷 期：2015年第2卷第3期
页 面：183-190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]
主 题：Bulk density Mineral and organic soils Canada’s arctic and sub-arctic
摘 要：Bulk density is an indicator of soil compaction subject to anthropogenic impact,essential to the interpretation of any nutrient budgets,especially to perform carbon *** is so expensive to measure bulk density in arctic/sub-arctic and there are relatively very few field measurements are ***,to establish a bulk density and SOC empirical relationship in Canada’s arctic and sub-arctic ecosystems,compiled all the bulk density and SOC measurements that are available in Northern *** addition an attempt has been made for bulk density and SOC field measurement in Yellowknife and Lupin,to develop an empirical relationship for Canada’s arctic and *** between bulk density(BD)and soil organic carbon(SOC)for mineral soil and organic soils(0–100 cm depth)were described by exponential *** best fit model,predictive bulk density(BDp),for mineral soil,(BDp=0.701+0.952 exp(0.29 SOC),n=702,R2=0.99);for organic soil(BDp=0.074+2.632 exp(0.076 SOC),n=674,R2=0.93).Different soil horizons have different bulk densities and may require different predictive equations,therefore,developed predictive best fit exponential equation for both mineral and organic soils together(BDp=0.071+1.322 exp(0.071 SOC),n=1376,R2=0.984),where X is a dummy variable with a value of 0 for surface peat(0–25 cm depth)and 1 for subsurface peat(25–175 cm).We recommend using the soil organic carbon density approach to estimate BD from SOC because it allows BD to be predicted without significant bias.
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