生态学杂志2017，Vol.36Issue(9)：2455-2464,10.DOI:10.13292/j.1000-4890.201709.019
敦煌阳关湿地土壤有机碳分布特征及其影响因素
Distribution and influencing factors of soil organic carbon in Dunhuang Yangguan wetland
摘要
Abstract
Soil carbon storage of wetland ecosystems plays an important role in global carbon budget.In terms of coverage of wetland,three types of sites,including high,medium and low coverage,were sampled in Wowachi herbal marsh wetlands of National Nature Reserve of Dunhuang Yangguan.Soil samples at 0-20,20-40,40-60 cm layers were taken from 53 plots to explore the distribution of soil organic carbon (SOC) and its influence factors.The results showed that the SOC concentrations at 0-60 cm depths were 4.94-25.89,4.77-13.89,and 3.56-11.42 g · kg-1 at high,medium and low coverage sites,respectively.The differences in SOC at 0-20 cm and 40-60 cm depths were significant between high,medium and low coverage (P＜0.05).The spatial variation of SOC was the largest in wetland with high coverage,and it was the smallest in wetland with medium coverage,while it was intermediate in wetland with low coverage.The SOC was positively correlated with soil moisture,total nitrogen,total phosphorus and N∶P ratio (P＜0.01),but it was negatively correlated with soil salinity and soil bulk density (P＜ 0.01).Soil moisture was the key factor affecting SOC accumulation.Our results can provide scientific basis for wetland protection,management and ecological restoration in this arid region.关键词
敦煌阳关湿地/植被盖度/土壤有机碳/分布特征/土壤水分Key words
Dunhuang Yangguan wetland/vegetation cover/soil organic carbon/distribution characteristics/soil moisture引用本文复制引用
张剑,王利平,谢建平,赵庭伟,曹建军..敦煌阳关湿地土壤有机碳分布特征及其影响因素[J].生态学杂志,2017,36(9):2455-2464,10.基金项目
国家自然科学基金项目(41461012、41461109)、甘肃省自然科学基金项目(1208RJZA114)和西北师范大学青年教师科研能力提升计划项目(NWNU-LKQN-11-10)资助. （41461012、41461109）
