干旱区生态环境知识资源中心(Arid): 敦煌绿洲边缘植物群落与土壤养分互馈关系

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	敦煌绿洲边缘植物群落与土壤养分互馈关系
其他题名	Mutual Feedback Relationship between Vegetation Communities and Soil Nutrient in the Edge of Dunhuang Oasis
	赵鹏 1; 屈建军2 ; 韩庆杰 2; 徐先英 3; 姜生秀 3; 付贵全 3
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2018
卷号	38 期号:4 页码:791-799
中文摘要	植物群落与土壤性状相互作用研究对于认识生态系统结构与功能有着重要的意义。通过对敦煌绿洲边缘典型植物群落21个样地(20m*20m)的植被和土壤系统取样调查,在分析植物群落及其土壤养分特征的基础上,采用CCA典范对应分析法研究了土壤养分对植物群落物种分布的影响。结果表明:调查区域植被群落共出现植物27种,隶属于15科,26属,以藜科(Chenopodiaceae)植物居多,占总物种数的29.6%。柽柳(Tamarix chinensis)群落的物种丰富度最大,胡杨(Populus euphratica)群落的物种丰富度最小。植被0~80cm土壤有机质、全氮、速效磷、速效钾含量排序为柽柳>黑果枸杞(Lycium ruthenicum)>梭梭(Haloxylon ammodendron)>沙拐枣(Calligonum mongolicum),全磷、全盐、速效氮含量排序为柽柳>黑果枸杞>沙拐枣>梭梭,全钾含量排序为黑果枸杞>柽柳>梭梭>沙拐枣,pH值排序为梭梭>沙拐枣>黑果枸杞>柽柳。不同植被覆盖各养分指标之间差异显著。随土层深度的增加,柽柳和黑果枸杞群落土壤全氮、有机质、全盐、速效氮、速效钾含量逐渐降低,表聚效应明显,土壤全磷、全钾、速效磷含量逐渐增大后减小,梭梭与沙拐枣养分层次特征不明显。4种植被群落土壤pH值随土层深度的增大呈波动的趋势。CCA排序结果表明植被群落物种分布的土壤环境调控因子重要性排序为全氮>pH>全钾,土壤全氮是植物群落物种分布的最重要调控因子。
英文摘要	Reaserch on interaction relationship between vegetation community and soil properties has significance to understanding the structure and funcation.Through the systematic sampling and survey of 21 samples plots of 20 m*20 m dimensions,based on the analysis of the characteristics of communities and soil nutrient,the relationship between species distribution of communities and soil nutrient were investigated with the methods of canonical corresponding analysis(CCA).The results show that:there were 27 kinds of species in study area,which belong to 15 families and 26 genera.The majority of species were Chenopodiaceae plant and accounted for 29.6%of total species number.The species richness of Tamarix chinensis community was the highest,and that of Populus euphratica was the lowest.Four vegetation cover including T.chinensis community,Lycium ruthenicumcommunity,Haloxylon ammodendron community and Calligonum mongolicum community in edge of Dunhuang Oasis were selected as a case study.Soil samples were collected at depths of 0-5,5-20,20-40,40-60 and60-80 cm,to analyze their physicochemical properties.The soil in depths of 80 cm organic matter content(SOM),total nitrogen(TN),available phosphorus(AP),available potassium (AK)decreased in order of T.chinensis>L.ruthenicum>H.ammodendron>C.mongolicum;Total phosphorus(TP),total salt(TS)and available nitrogen(AN)decreased in order of T.chinensis>L.ruthenicum >C.mongolicum>H.ammodendron;Total potassium (TK)decreased in order of L.ruthenicum>T.chinensis>H.ammodendron>C.mongolicum;pH decreased in order of T.chinensis>L.ruthenicum L.ruthenicum >T.chinensis.There were significant difference of each nutrient index among different vegetation cover.The TN,SOM,TS,AN and AK of T.chinensis and L.ruthenicumcommunity presented a decreasing trend with the increase of soil depths,which reflected an obvious surface aggregation effect.That of H.ammodendron and C.mongolicumcommunity were in a fluctuation trend.With increase of soil depths,the content of TP,TK and AP increased first and then decrease in T.chinensis and L.ruthenicumcommunity,which of H.ammodendron and C.mongolicumcommunity were also in a fluctuation trend.The trend of pH all four community showed a fluctuation.The result of CCA ordination show that importance rank of environmental factors which regulated the distribution of species in study area were TN>pH>TK.Soil total nitrogen is an important regulatory factor for the distribution of plant communities.
中文关键词	土壤养分 ; 群落特征 ; 互馈关系 ; 敦煌绿洲
英文关键词	CCA soil nutrient community’s characteristic mutual feedback relationship canonical corresponding analysis Dunhuang oasis
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6316085
来源机构	中国科学院西北生态环境资源研究院 ; 甘肃省治沙研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238783
作者单位	1.中国科学院西北生态环境资源研究院;;甘肃省治沙研究所;;中国科学院大学, 中国科学院沙漠与沙漠化重点实验室;;中国科学院敦煌戈壁荒漠生态与环境研究站;;荒漠化与风沙灾害防治国家重点实验室培育基地;;, 兰州;;兰州;;, 甘肃;;甘肃;;北京 730000;;730070;;100049, 中国; 2.中国科学院西北生态环境资源研究院, 中国科学院沙漠与沙漠化重点实验室;;中国科学院敦煌戈壁荒漠生态与环境研究站, 兰州, 甘肃 730000, 中国; 3.甘肃省治沙研究所, 荒漠化与风沙灾害防治国家重点实验室培育基地, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	赵鹏,屈建军,韩庆杰,等. 敦煌绿洲边缘植物群落与土壤养分互馈关系[J]. 中国科学院西北生态环境资源研究院, 甘肃省治沙研究所,2018,38(4):791-799.
APA	赵鹏,屈建军,韩庆杰,徐先英,姜生秀,&付贵全.(2018).敦煌绿洲边缘植物群落与土壤养分互馈关系.中国沙漠,38(4),791-799.
MLA	赵鹏,et al."敦煌绿洲边缘植物群落与土壤养分互馈关系".中国沙漠 38.4(2018):791-799.