干旱区生态环境知识资源中心(Arid): 温带荒漠区藻结皮固氮活性沿时间序列的变化

Arid

	温带荒漠区藻结皮固氮活性沿时间序列的变化
其他题名	Nitrogenase Activity Chronosequence of Algal Crusts in Temperate Desert Region
	苏延桂 1; 李新荣2 ; 贾小红 2; 李爱霞 2; 陈应武 3
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2012
卷号	32 期号:2 页码:421-427
中文摘要	利用乙炔还原法,测定腾格里沙漠东南缘沙坡头地区不同年代建植的人工植被固沙区和相邻自然植被区藻结皮的固氮活性及其对水分和温度的响应特征。结果表明,不同植被区藻结皮的固氮活性在4.31~16.6mmol·m~(-2)·h~(-1);人工植被区藻结皮的固氮活性与植被恢复时间呈显著的正相关关系,自然植被区藻结皮的固氮活性显著小于52龄人工植被区,但显著高于16龄人工植被区;藻结皮的固氮活性与叶绿素a含量和盖度呈显著正相关关系;模拟降雨量<1.1~1.5mm,不同人工植被区和自然植被区藻结皮的固氮活性随着模拟降雨量的增加而急剧增加,但当1.1~1.5mm<模拟降雨量<5mm时,藻结皮的固氮活性随模拟降雨量的增加无显著增加;不同植被区藻结皮的固氮活性与温度的关系表现出一致的变化趋势,当温度为13℃时,藻结皮的固氮活性显著低于最热月的均温(24℃)。
英文摘要	In this study,acetylene reduction was applied to investigate the nitrogenase activity of algal crusts in artificial vegetation areas with different restoration time and natural vegetation area,as well as their responses to simulated precipitation and temperature.Results showed that the nitrogenase activity of algal crusts varied in a range of 4.31~16.6 mmol·m~(-2)·h~(-1) in the region.Significantly positive correlation was observed between nitrogenase activity and restoration time in the artificial vegetation area,the nitrogenase activity in natural vegetation area was significantly lower than in 52-year-restoration artificial vegetation area,while profoundly higher than 16-year-restoration artificial vegetation area.Significantly positive correlations between nitrogenase activity and Chl a,as well as with crust cover were observed.The nitrogenase activity increased dramatically with increase of simulated precipitation when the precipitation amount was less than 1.1 mm,while when the precipitation was from 1.1 mm to 5 mm,the nitrogenase activity gradually showed steady status.The nitrogenase activity of different vegetation areas showed similar pattern with air temperature.All nitrogenase activity showed a higher value under the air temperature of 24 ℃ compared with 13 ℃ in the artificial vegetation area.
中文关键词	藻结皮 ; 乙炔还原法 ; C2H4产量 ; 固氮 ; 固氮活性
英文关键词	algal crusts acetylene reduction C2H4 production nitrogen fixation nitrogenase activity
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:4457275
来源机构	中国科学院西北生态环境资源研究院 ; 中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/228994
作者单位	1.中国科学院新疆生态与地理研究所, 中国科学院干旱区生物地理与生物资源重点实验室, 乌鲁木齐, 新疆 830011, 中国; 2.中国科学院寒区旱区环境与工程研究所沙坡头沙漠试验研究站, 兰州, 甘肃 730000, 中国; 3.河南科技大学林学院, 洛阳, 河南 471003, 中国
推荐引用方式 GB/T 7714	苏延桂,李新荣,贾小红,等. 温带荒漠区藻结皮固氮活性沿时间序列的变化[J]. 中国科学院西北生态环境资源研究院, 中国科学院新疆生态与地理研究所,2012,32(2):421-427.
APA	苏延桂,李新荣,贾小红,李爱霞,&陈应武.(2012).温带荒漠区藻结皮固氮活性沿时间序列的变化.中国沙漠,32(2),421-427.
MLA	苏延桂,et al."温带荒漠区藻结皮固氮活性沿时间序列的变化".中国沙漠 32.2(2012):421-427.