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《Journal of Soil and Water Conservation》 2017-04
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Effect of Urbanization on Soil Organic Carbon Fractions and Carbon Pool Management Index in Remnant Evergreen Broad-leaved Forests of the Pearl River Delta

ZHANG Xueying;CHEN Xiaomei;WEI Hui;LIN Meizhen;School of Geographical Sciences,Guangzhou University;College of Natural Sources and Environment,South China Agricultural University;  
In order to reveal effect of urbanization on soil organic carbon fractions and carbon pool management index,soil samples collected from six remnant evergreen broad-leaved forests in the Pearl River Delta were analyzed.The six sampling areas included three urban forests(botanical garden,Baiyunshan and Maofengshan)and three suburb ones(Heshan,Conghuashimen and Dinghushan).Soil samples were collected from 0—10cm and 10—20cm soil layers,respectively,and total organic carbon(TOC),readily oxidizable organic carbon(ROC)and non-readily oxidizable organic carbon(NROC)of the samples were determined.Results were as follows:(1)TOC,ROC and NROC content of urban forests soil was significantly lower than that of the suburban forests soil(P0.05).(2)In the surface soil(0—10cm layer),soil carbon pool activity and carbon pool activity index of the urban forests were both significantly higher than those of the suburban forests(P0.05),and in the sub-surface soil(10—20cm layer),the above pattern was also observed but there was no significant difference in both indices between these two kinds of forests(P0.05).(3)In both two soil layers,soil carbon pool index and carbon pool management index of suburban forests were both significantly higher than those of urban forests(P0.05).This study suggests that urbanization increased soil organic carbon activity of the remnant evergreen broad-leaved forests,but urbanization was detrimental to the accumulation of total organic carbon in soil.
【Fund】: 广州市属高校科技计划项目(1201430746);; 国家自然科学基金项目(31400415);; 广东省普通高校青年创新人才项目(2014KQNCX110)
【CateGory Index】: S714.2
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