干旱区生态环境知识资源中心(Arid): 施氮对荒漠化草原土壤理化性质及酶活性的影响

Arid

	施氮对荒漠化草原土壤理化性质及酶活性的影响
其他题名	Effects of nitrogen addition on soil physico-chemical properties and enzyme activities in desertified steppe
	苏洁琼; 李新荣; 鲍婧婷
来源期刊	应用生态学报
ISSN	1001-9332
出版年	2014
卷号	25 期号:3 页码:664-670
中文摘要	以腾格里沙漠东南缘的荒漠化草原为对象,设置添加0、1. 75、3. 5、7和14 g N·m~(-2)·a~(-1) 5个氮素水平,研究了施氮对该地区土壤理化性质和土壤酶活性的影响. 结果表明: 施氮导致表层(0 ~ 10 cm)和下层(10 ~ 20 cm)土壤中总氮、NO_3~- -N、NH_4~+ -N 和有效氮的累积, 土壤pH 下降,对土壤有一定的酸化作用. 施氮明显抑制了土壤酶活性,且不同酶活性在氮素投加水平、土层深度和年际间有所差异. 土壤酶活性与土壤氮素水平、土壤pH 及土壤水分之间存在显著相关关系.
英文摘要	To investigate the impacts of nitrogen (N) enrichment on soil physico-chemical property and soil enzyme activities in desert ecosystems,a field experiment by adding N at 0,1. 75,3. 5, 7,or 14 g N·m~(-2)·a~(-1) was conducted in a temperate desert steppe in the southeastern fringe of the Tengger Desert. The results showed that N addition led to accumulations of total N,NO_3~- -N, NH_4~+ -N,and available N in the upper soil (0 - 10 cm) and subsoil (10 - 20 cm),however,reductions in soil pH were observed,causing soil acidification to some extent. N addition pronouncedly inhibited soil enzyme activities,which were different among N addition levels,soil depths,and years,respectively. Soil enzyme activities were significantly correlated with the soil N level,soil pH,and soil moisture content,respectively.
中文关键词	氮素 ; 土壤酶活性 ; 荒漠化草原
英文关键词	nitrogen soil enzyme activity desert steppe
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ECOLOGY
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5094565
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231981
作者单位	中国科学院寒区旱区环境与工程研究所, 中科院沙坡头沙漠试验研究站, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	苏洁琼,李新荣,鲍婧婷. 施氮对荒漠化草原土壤理化性质及酶活性的影响[J]. 中国科学院西北生态环境资源研究院,2014,25(3):664-670.
APA	苏洁琼,李新荣,&鲍婧婷.(2014).施氮对荒漠化草原土壤理化性质及酶活性的影响.应用生态学报,25(3),664-670.
MLA	苏洁琼,et al."施氮对荒漠化草原土壤理化性质及酶活性的影响".应用生态学报 25.3(2014):664-670.