文献类型：期刊文献

中文题名：杭州湾湿地不同植被类型下土壤有机碳及其组分分布特征

英文题名：DISTRIBUTION CHARACTERISTICS OF ORGANIC CARBON AND ITS COMPONENTS IN SOILS UNDER DIFFERENT TYPES OF VEGETATION IN WETLAND OF HANGZHOU BAY

作者：张文敏[1,2] 吴明[1] 王蒙[1] 邵学新[1] 姜小三[2] 周斌[3]

第一作者：张文敏

机构：[1]中国林业科学研究院亚热带林业研究所国家林业局杭州湾湿地生态系统定位观测研究站,浙江富阳311400;[2]南京农业大学资源与环境科学学院,南京210095;[3]杭州师范大学理学院遥感与地球科学研究院,杭州311121

年份：2014

卷号：51

期号：6

起止页码：1351-1360

中文期刊名：土壤学报

外文期刊名：Acta Pedologica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家自然科学基金项目(31000296);中国林科院亚热带林业研究所基本科研业务费(RISF61256);杭州师范大学遥感与地球科学研究院开放基金项目(DDKF2011YG01)共同资助

语种：中文

中文关键词：土壤有机碳;活性有机碳;轻组有机质;植被类型;杭州湾湿地

外文关键词：Soil organic carbon; Labile organic carbon; Light fraction organic matter; Vegetation types; Hangzhou Bay Wetland

分类号：S153

摘要：土壤有机碳及其活性组分能够敏感地反映土壤碳库的变化。调查采集杭州湾自然滩涂湿地土壤样品（0~10 cm、10~20 cm、20~30 cm），比较分析芦苇、互花米草、海三棱藨草、裸滩的土壤有机碳（SOC）、水溶性有机碳（DOC）、易氧化碳（ROC）和轻组有机质（LFOM）的变化。结果表明：（1）0~30 cm各土层，芦苇、互花米草、海三棱藨草和裸滩的SOC平均含量依次为3.87~5.08 g kg-1，6.46~6.78 g kg-1，4.33~4.48 g kg-1和4.99~5.25 g kg-1，互花米草SOC含量高于相同土层的其他类型；（2）互花米草DOC和LFOM平均含量分别为90.69~98.90 mg kg-1，2.35~2.95 g kg-1，高于相同土层的海三棱藨草、芦苇和裸滩，而裸滩ROC含量（2.06~2.22 g kg-1）却高于相同土层的其他三种类型；（3）芦苇、互花米草和海三棱藨草DOC占土壤有机碳的分配比例无显著性差异，而相同土层的DOC占土壤有机碳的分配比例大小依次为裸滩〉海三棱藨草〉芦苇〉互花米草；（4） SOC和DOC、ROC、LFOM、全氮（TN）、土壤含水量、pH之间均存在极显著关系（p〈0.01），各指标与pH之间均表现为负相关性。研究表明互花米草的入侵增强了滩涂湿地的固碳能力，有机碳活性组分能够反映有机碳库的变化。
Soil organic carbon and its labile components are sensitive indicators of changes in soil carbon pool. Therefore, the study on soil organic carbon and its labile components is of great significance to the research of global climate change. A field survey was carried out of tidal flats and natural wetlands in Hangzhou Bay with samples of soils at 0~10 cm, 10~20 cm, 20~30 cm in depth collected for analysis of changes in soil organic carbon （SOC）, soil dissolved organic carbon （DOC）, soil readily oxidizable carbon （ROC） and light fraction organic matter （LFOM） in bare mudflat and mudflats under Phragmites australis, Spartina alterniflora and Scirpus mariqueter, and relationships between various fractions of organic carbon and soil physico-chemical properties. Results indicate that （1） the mean SOC content in soils of the three soil layers was 3.87~5.08 g kg-1, 6.46~6.78 g kg-1, 4.33~4.48 g kg-1 and 4.99~5.25 g kg-1 in mudflat under Phragmites australis, Spartina alterniflora, and Scirpus mariqueter, and bare mudflat; the mudflat under Spartina alterniflora was the highest and followed by bare mudflat in mean SOC content; soil TN and SOC varied in a similar trend, regardless of vegetation; （2） The mudflat under Spartina alterniflora was the highest in mean DOC and LFOM content, being 90.69~98.90 mg kg-1 and 2.35~2.95 g kg-1 respectively, while the bare mudflat the lowest, however, the bare mudflat was the highest in mean ROC content, being 2.06~2.22 g kg-1; （3） No significant difference was observed between the mudflats under Phragmites australis, Spartina alterniflora, andScirpus mariqueter in DOC/SOC ratio, but in ROC/SOC ratio, a decreasing order was found of bare mudflat 〉 mudflat under Scirpus mariqueter 〉 mudflat under Phragmites australis 〉 mudflat under Spartina alterniflora; （4） SOC was significantly and positively related to DOC, ROC and LFOM; Besides, SOC was also significantly and positively related to TN and soil moisture content; but all the SOC fractions were negatively related to soil pH （p〈0.01）. All the findings indicate that the invasion of Spartina alterniflora is not so bad because the plants help enhance wetlands’ carbon sequestration capacity, and the labile fractions of organic carbon are good indicators of changes in soil organic carbon pool in wetlands.