干旱区生态环境知识资源中心(Arid): 荒漠草地土壤~(15)N同位素对水分变化的响应

Arid

	荒漠草地土壤~(15)N同位素对水分变化的响应
其他题名	Response of Soil~(15)N Isotope to Water Changes in Desert Grassland
	禹朴家; 徐海量; 王炜; 张鹏; 赵新风; 傅荩仪
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2011
卷号	25 期号:2 页码:241-244
中文摘要	影响delta~(15)N格局的因素主要有气候、时间、地形和土地利用等,而水分是干旱区植被分布的主要限制因子,对调节荒漠草地稳定性N同位素具有重要作用. 利用~(15)N标记法,通过不同的增水处理,研究了古尔班通古特沙漠南缘氮素标记样地和未标记样地土壤N同位素对水分变化的响应,得出以下结论:(1)增水处理增加了对土壤水分的补给,随着增水量的增加土壤水分含量不断增加;(2)研究区土壤delta~(15)N值变化范围为12.19~13.33,增水处理对未标记样地土壤delta~(15)N值并没有显著的影响;(3)添加氮素后,样地土壤delta~(15)N值明显升高. 随着增水量的增加,土壤总delta~(15)N呈现出典型的倒"U"型曲线,不同土层深度的土壤delta~(15)N值也发生了显著的变化;(4)标记样地50-100 cm土层土壤delta~(15)N值要明显高于非标记样地,表明标记样地土壤中添加的稳定性~(15)N同位素仍在向更深的土层移动
英文摘要	Climate, time, topography and land use are the main factors which influence the distribution patter of delta~(15)N. Water, the main limiting factors to the distribution of plants in arid and semi-arid areas, plays an important role in regulating the~(15)N isotope in the desert grassland. Using the~(15)N labeling method, the response of soil N isotope to water change for labeled sample plots and unlabeled sample plots in the southern fringe of Gurbantunggut desert were studied under the different water increasing level. The results showed that:(1)The treatment of increasing water increased the soil water. With the increasing of the water increasing level, the soil water was increasing. (2)The range of soildelta~(15)N was from 12.19to13.33in the study area. The treatment of increasing water didn’t have significant impact on the soildelta~(15)N in the labeled sample plots. (3)The soildelta~(15)N was increase significant after nitrogen addition. With the increasing of the water increasing level, the changes of total soildelta~(15)N showed a typical inverted"U"curve and thedelta~(15)N in the different soil layer was also changed significant. (4)Thedelta~(15)N of the 50-100 cm soil layer in the labeled sample plots was higher than that in the unlabeled sample plots, which indicated that the added~(15)N isotope in the labeled sample plots was still moving to the deeper soil
中文关键词	增水处理 ; 土壤 ; 荒漠草地
英文关键词	delta~(15)N delta~(15)N precipitation increase soil desert grassland
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:4190281
来源机构	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/2XILL650/227078
作者单位	中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	禹朴家,徐海量,王炜,等. 荒漠草地土壤~(15)N同位素对水分变化的响应[J]. 中国科学院新疆生态与地理研究所,2011,25(2):241-244.
APA	禹朴家,徐海量,王炜,张鹏,赵新风,&傅荩仪.(2011).荒漠草地土壤~(15)N同位素对水分变化的响应.水土保持学报,25(2),241-244.
MLA	禹朴家,et al."荒漠草地土壤~(15)N同位素对水分变化的响应".水土保持学报 25.2(2011):241-244.