中亚热带山区土地利用变化对土壤有机碳储量和质量的影响(英文)

编号 zgly0001585963

文献类型 期刊论文

文献题名 中亚热带山区土地利用变化对土壤有机碳储量和质量的影响(英文)

作者 杨玉盛  谢锦升  盛浩  陈光水  李旭  杨智杰 

作者单位 SchoolofGeographicalScience  FujianNormalUniversity  FujianProvincialKeyLaboratoryofSubtropicalResourcesandEnvironment 

母体文献 Journal of Geographical Sciences 

年卷期 2009年01期

年份 2009 

分类号 S153 

关键词 mid-subtropics  LUCC  soilorganiccarbon  carbonquality 

文摘内容 Land use/cover change(LUCC) is widely recognized as one of the most important driving forces of global carbon cycles.The influence of converting native forest into plantations,secondary forest,orchard and arable land on stores and quality of soil organic carbon(SOC) was investigated in mid-subtropical mountainous area of southern China.The results showed that LUCC had led to great decreases in SOC stocks and quality.Considerable SOC and light-fraction organic carbon(LFOC) had been stored in the native forest(142.2 t hm-2 and 14.8 t hm-2 respectively).When the native forest was converted to plantations,secondary forest,orchard and arable land,the SOC stocks decreased by 25.6%,28.7%,38.0%,31.8% and 51.2%,respectively.The LFOC stocks decreased by 52.2% to 57.2% when the native forest was converted to woodland plantations and secondary forest,and by 82.1% to 84.2% when converted to economic plantation,orchard and arable land.After the conversion,the ratios of LFOC to SOC(0-60 cm) decreased from 13.3% to about 3.0% to 10.7%.The SOC and LFOC stored at the upper 20 cm were more sensitive to LUCC when compared to the subsurface soil layer.Also,the decline in carbon storage induced by LUCC was greater than the global average level,it could be explained by the vulnerable natural environment and special human management practices.Thus,it is wise to enhance soil carbon sequestration,mitigate elevated atmospheric CO2 and develop ecological services by protecting vulnerable environment,restoring vegetation coverage,and afforesting in mountainous area in mid-subtropics.