伊犁河谷不同类型湿地土壤活性有机碳组分及其含量差异

生态学杂志

伊犁河谷不同类型湿地土壤活性有机碳组分及其含量差异

崔东^1,2,3*,闫俊杰²,刘海军²,陈晨²

(¹污染物化学与环境治理重点实验室，伊犁师范大学化学与环境科学学院，新疆伊宁 835000；²伊犁师范大学生物与地理科学学院，新疆伊宁835000；³中国科学院新疆生态与地理研究所，荒漠与绿洲生态国家重点实验室，乌鲁木齐 830011)

出版日期:2019-07-10 发布日期:2019-07-10

Soil labile organic carbon fractions and the differences of their concentrations in different types of wetlands in Yili valley.

CUI Dong^1,2,3*, YAN Jun-jie², LIU Hai-jun², CHEN Chen²

(¹Key Laboratory of Pollutant Chemistry and Environmental Treatment, College of Chemistry & Environmental Sciences, Yili Normal University, Yining 835000, Xinjiang, China; ²College of Biology and Geography, Yili Normal University, Yining 835000, Xinjiang, China; ³State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China).

Online:2019-07-10 Published:2019-07-10

摘要/Abstract

摘要： 土壤活性有机碳对环境变化反应敏感，为探讨伊犁河谷不同类型湿地土壤活性有机碳组分含量及其影响因素，本研究以伊犁河谷常年水淹的芦苇湿地、极少水淹的雀稗湿地以及季节性水淹的拂子茅湿地为对象，测定0～40 cm土层内土壤易氧化有机碳(EOC)、可溶性有机碳(DOC)、微生物生物量碳(MBC)的含量，分析不同类型湿地EOC、DOC和MBC之间的相关性及其与土壤酶活性（蔗糖酶、脲酶、过氧化氢酶）、土壤养分（铵态氮、全磷）和土壤有机碳（SOC）之间的关系。结果表明：3种不同类型湿地土壤活性有机碳组分在0～40 cm土层内的垂直分异规律一致，均随土壤剖面的加深而递减，而土壤MBC、EOC和DOC含量差异性显著（P<0.05），其中芦苇湿地的土壤MBC、EOC和DOC含量均最低；3种类型湿地中，MBC、EOC和DOC所占SOC的比例分别在4.33%～18.02%、28.85%～66.06%、0.73%～1.36%；除DOC所占SOC比例在0～40 cm土层内呈现先增大后减小规律外，MBC和EOC占SOC比例未呈现一致的变化规律；3种土壤活性有机碳组分所占土壤有机碳的比例以EOC所占比例最大，DOC所占比例最小；MBC、EOC占SOC的比例均以雀稗湿地最高，DOC所占比例以拂子茅湿地最高，而芦苇湿地MBC、EOC和DOC比例均较低；3种类型湿地MBC、EOC和DOC彼此之间相关性均达到显著水平，DOC与土壤全磷相关性不显著，而3种土壤活性有机碳组分与土壤养分、土壤酶活性相关性均达到显著水平。本研究表明，土壤酶活性和土壤养分是影响土壤活性有机碳含量的重要因子。

关键词: 珠海万山, 海洋生态系统服务, 能值价值, 货币价值

Abstract: Soil labile organic carbon is sensitive to environmental changes. We investigated the contents of labile organic carbon fractions in different types of wetland soils and its influencing factors in Yili Valley, including the longterm flooding reed (Phragmites australis) wetland, rarely flooding ditch millet (Paspalum orbiculare) wetland, and seasonal flooding chee reedgrass (Calamagrostis epigeios) wetland. The concentrations of easily oxidized organic carbon (EOC), dissolved organic carbon (DOC) and microbial biomass carbon (MBC) in 0-40 cm soil layers of different types of wetlands were measured. The correlations between soil EOC, DOC and MBC, and their relationships with activities of soil enzymes (invertase, urease, catalase), soil nutrient concentrations (ammonium nitrogen, total phosphorus) and soil organic carbon (SOC) concentrations were analyzed. The vertical differentiation of the soil labile organic carbon contents in the 0-40 cm soil layer in the three different types of wetland was consistent, decreasing with soil depth across the soil profile. The contents of MBC, EOC and DOC were significantly different among the three wetlands (P<0.05), with lowest contents of MBC, EOC and DOC in reed wetland. Among the three types of wetlands, the proportions of MBC, EOC and DOC in SOC were 4.33%-18.02%, 28.85%-66.06%, and 0.73%-1.36% in the 0-40 cm soil layer, respectively. There was no consistent pattern of the proportions of MBC and EOC, except that the proportion of DOC in SOC increased first and then decreased. Among the three soil labile organic carbon fractions, the proportion of the EOC was the highest and that of the DOC was the lowest. The highest proportions of MBC and EOC in SOC were found in the ditch millet wetland. The highest proportion of DOC was found in the chee reedgrass wetland. The proportions of MBC, EOC and DOC in reed wetlands were relatively lower. The correlations between the MBC, EOC and DOC in the three types of wetlands were significantly correlated. The correlation between DOC and soil total phosphorus was not significant, while the three soil labile organic carbon fractions with soil nutrients and soil enzyme activities were significantly correlated. Our results indicated that soil enzyme activities and soil nutrients were important factors affecting soil labile organic carbon contents.

Key words: Wanshan District, Zhuhai, marine ecosystem service, emergy value, monetary value.

崔东,闫俊杰,刘海军,陈晨. 伊犁河谷不同类型湿地土壤活性有机碳组分及其含量差异[J]. 生态学杂志.

CUI Dong, YAN Jun-jie, LIU Hai-jun, CHEN Chen. Soil labile organic carbon fractions and the differences of their concentrations in different types of wetlands in Yili valley.[J]. cje.