干旱区生态环境知识资源中心(Arid): 干旱过程中荒漠生物土壤结皮 -土壤系统的硝化作用对温度和湿度的响应以沙坡头地区为例

Arid

	干旱过程中荒漠生物土壤结皮 -土壤系统的硝化作用对温度和湿度的响应以沙坡头地区为例
其他题名	Nitrification of biological soil crusts and soil system during drought process and its response to temperature and moisture:A case study in the Shapotou region,Northwest China
	徐冰鑫 1; 陈永乐 1; 胡宜刚 1; 张志山1 ; 李刚 1; 李梦茹 2; 陈栋 1
来源期刊	应用生态学报
ISSN	1001-9332
出版年	2015
卷号	26 期号:4 页码:1113-1120
中文摘要	以腾格里沙漠东南缘天然植被区由藻类、藓类结皮所覆盖的土壤和流沙为研究对象,采用原状土室内培养法,在15和20 ℃两个温度、10%和25%两个湿度下连续培养20 d,分别在培养后的第1、2、5、8、12、20天连续测定土壤样品中的 NO_3~--N含量,探讨不同温度和湿度条件下荒漠土壤的净硝化速率在干旱过程中的变化规律.结果表明:藓类结皮的 NO_3~--N含量(2.29 mg·kg~(-1))高于藻类结皮(1.84 mg·kg~(-1))和流沙(1.59 mg·kg~(-1)),3种类型的土壤净硝化速率介于-3.47~2.97 mg·kg~(-1)·d~(-1)之间.10%湿度条件下,藻类和藓类结皮在25 ℃下的净硝化速率比15 ℃分别减少75.1%和0.7%;25%湿度条件下,分别减少99.1%和21.3%;15 ℃、10%湿度条件下藻类和藓类结皮的净硝化速率比25 ℃、25%湿度条件下增加193.4%和107.3%.表明在全球变暖背景下,无论土壤湿度增加或减少,干旱过程中的荒漠生物土壤结皮-土壤系统净硝化速率在一定程度上都会受到抑制.
英文摘要	Two types of soil covered by biological soil crusts (BSCs),i. e. moss and algae,and moving sand in the natural vegetation area at the southeast fringe of the Tengger Desert were collected intactly. They were incubated continuously for 20 days under two different temperatures (15 ℃and 25 ℃) and moistures (10% and 25%) condition in the laboratory,and soil NO_3~--N contents were measured after 1,2,5,8,12,20 days of incubation and net nitrification rate was evaluated during dehydration. The results showed that NO_3~--N content of the moss-covered soil (2. 29 mg·kg~(-1)) was higher than that of the algae-covered soil (1. 84 mg · kg~(-1)) and sand (1. 59 mg·kg~(-1)). Net nitrification rate of the three soil types ranged from - 3.47 to 2.97 mg·kg~(-1)·d~(-1).For the moss-covered soil and algae-covered soil at 10% and 25% moisture levels,the net nitrification rates at 15 ℃ were 75.1%,0.7% and 99.1%,21.3% higher than those at 25 ℃,respectively.Also,the net nitrification rates at 15 ℃ and 10% moisture levels were 193.4% and 107.3% higher than those at 25 ℃ and 25% moisture levels,respectively. The results suggested that regardless of soil moisture increasing or decreasing under the global warming senior,the net nitrification rate of BSCs-soil system in the desert would probably be limited to some extent during drought process.
中文关键词	生物土壤结皮 ; 干旱过程 ; 硝态氮 ; 净硝化速率
英文关键词	biological soil crusts drought process nitrate nitrogen net nitrification rate
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5391458
来源机构	中国科学院西北生态环境资源研究院 ; 甘肃农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233576
作者单位	1.中国科学院寒区旱区环境与工程研究所沙坡头沙漠研究试验站, 兰州, 甘肃 730000, 中国; 2.甘肃农业大学, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	徐冰鑫,陈永乐,胡宜刚,等. 干旱过程中荒漠生物土壤结皮 -土壤系统的硝化作用对温度和湿度的响应以沙坡头地区为例[J]. 中国科学院西北生态环境资源研究院, 甘肃农业大学,2015,26(4):1113-1120.
APA	徐冰鑫.,陈永乐.,胡宜刚.,张志山.,李刚.,...&陈栋.(2015).干旱过程中荒漠生物土壤结皮 -土壤系统的硝化作用对温度和湿度的响应以沙坡头地区为例.应用生态学报,26(4),1113-1120.
MLA	徐冰鑫,et al."干旱过程中荒漠生物土壤结皮 -土壤系统的硝化作用对温度和湿度的响应以沙坡头地区为例".应用生态学报 26.4(2015):1113-1120.