干旱区生态环境知识资源中心(Arid): 基于典范对应分析的会仙岩溶湿地土壤理化性质与土壤酶活性关系研究

Arid

	基于典范对应分析的会仙岩溶湿地土壤理化性质与土壤酶活性关系研究
其他题名	Relationship between soil physicochemical properties and soil enzyme activities in Huixian karst wetland system based on Canonical Correspondence Analysis
	张莹 1; 刘畅 1; 宋昂 2; 靳振江 3; 李强 2
来源期刊	中国岩溶
ISSN	1001-4810
出版年	2016
卷号	35 期号:1 页码:11-18
中文摘要	为揭示湿地退化过程中土壤理化性质与土壤酶活性关系,文章以广西桂林市会仙岩溶湿地系统中的湿地、稻田和旱地三种土地利用类型的表层土壤为研究对象,运用描述性分析、相关性分析和典范对应分析(Canonical Correspondence Analysis,CCA)等方法来探讨它们之间的内在联系。结果表明:土壤理化性质除有效磷、速效钾外,土壤有机碳、全氮、碱解氮、阳离子交换量、交换性钙、交换性镁的质量分数均表现为湿地>稻田>旱地,说明岩溶湿地在维持土壤碳库以及营养元素方面具有重要的作用。会仙湿地中有效磷、速效钾的质量分数低于稻田和旱地,根本原因在于人类活动以及农业活动的影响。除蛋白酶外,脲酶、蔗糖酶、碱性磷酸酶和纤维素酶的质量分数均在湿地中最高,与土壤理化性质的质量分数在湿地中较高相吻合,并表现出较强的空间异质性。进一步分析典范对应分析图,可知会仙岩溶湿地受人类活动影响较大,湿地首先被开垦为稻田,随着土壤自然肥力的下降最后被开垦成旱地,因此在生态演替不可逆转的条件下,将稻田作为人工湿地加以保护是维持湿地生态环境最佳的土地利用方式。
英文摘要	Wetland as an important ecological system plays an important role in regulating water and climate change,which was affected by human activities.Therefore,wetland degradation becomes a global phenomenon and the focus of many scientists.Huixian karst wetland system has the research base for comprehensive control of karst ecology and rocky desertification,belonging to original semi-disturbed wetland where in the past 20 years fertilizers have been applied to paddy field and dry land.In order to reveal the relationship between soil physicochemical properties and soil enzyme activities in Huixian karst wetland system,soil samples from three kinds of lands(wetland,paddy field and dry land)were collected.To gain a better understanding of the impact from the human and agricultural activities on the karst wetland system,a suitable evaluation method based on descriptive analysis,correlation analysis and canonical correspondence analysis(CCA)was employed.The highest content of soil organic carbon,total nitrogen,alkali-hydrolyzable nitrogen, cation exchange capacity,exchangeable calcium and exchangeable magnesium appears in the wetland, followed by the paddy field and dry land,respectively;the lowest content of available phosphorus and potassium occurs in the wetland.Therefore,the karst wetland system has an important function in the maintenance of soil carbon sink and nutrition cycle.The content of available phosphorus and potassium in wetland was lower than those in the paddy field and dry land,which was affected by human and agricultural activities. The concentrations of urease,invertase,alkaline phosphatase and cellulose are also quite high in the wetland and show a strong spatial heterogeneity.By analyzing soil factors and soil enzymes confined to wetland and paddy field of the study area,the CCA biplot shows a trend of land degradation in this area,from which it can be seen that the wetland is influenced by human activities.Wetland was first cultivated as paddy field, later it was eventually reclaimed into dry land with the decline of soil natural fertility.Therefore,among these three types of lands,the wetland has a high carbon storage function,while the paddy field has the similar one.If the ecological succession is irreversible,the best way to maintain the ecological environment of wetland system is to protect paddy field as constructed wetland.It is also important to regulate and promote carbon sequestration in karst area.
中文关键词	湿地 ; 土壤有机碳 ; 土地利用方式 ; 土壤酶 ; 典范对应分析
英文关键词	wetland soil organic carbon land use pattern soil enzyme canonical correspondence analysis
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5707531
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235518
作者单位	1.桂林理工大学环境科学与工程学院, 国土资源部、广西壮族自治区岩溶动力学重点实验室, 桂林, 广西 541004, 中国; 2.中国地质科学院岩溶地质研究所, 国土资源部、广西壮族自治区岩溶动力学重点实验室, 桂林, 广西 541004, 中国; 3.桂林理工大学环境科学与工程学院, 桂林, 广西 541004, 中国
推荐引用方式 GB/T 7714	张莹,刘畅,宋昂,等. 基于典范对应分析的会仙岩溶湿地土壤理化性质与土壤酶活性关系研究[J],2016,35(1):11-18.
APA	张莹,刘畅,宋昂,靳振江,&李强.(2016).基于典范对应分析的会仙岩溶湿地土壤理化性质与土壤酶活性关系研究.中国岩溶,35(1),11-18.
MLA	张莹,et al."基于典范对应分析的会仙岩溶湿地土壤理化性质与土壤酶活性关系研究".中国岩溶 35.1(2016):11-18.