干旱区生态环境知识资源中心(Arid): 荒漠草原2种锦鸡儿灌丛化过程中土壤养分分布规律

Arid

	荒漠草原2种锦鸡儿灌丛化过程中土壤养分分布规律
其他题名	Distribution Pattern of Soil Nutrients in the Thicketization of 2 Types of Caraganain Desert Steppe
	潘军; 安超平; 吴旭东; 周娟; 米楠; 宋乃平
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2015
卷号	29 期号:6 页码:131-136
中文摘要	以生长在荒漠草原地区常见的柠条锦鸡儿和中间锦鸡儿灌丛为研究对象,通过野外调查取样和室内分析,探讨2种锦鸡儿在灌丛化各发育阶段不同深度和不同部位土壤养分特征的变化规律。结果表明: (1)在荒漠草原区中间锦鸡儿属于低矮但树冠较密的灌丛,而柠条锦鸡儿属于高大但树冠稀疏的灌丛。 (2)2种锦鸡儿在灌丛化过程中,土壤有机碳和全氮含量在柠条灌丛沙堆从小变大的变化过程中,灌丛内部各土层的土壤整体呈极显著差异(P<0.01)。2种锦鸡儿灌丛的土壤有机碳和全氮含量随灌丛沙堆面积的增加呈逐渐增加的趋势,灌丛内部土壤有机碳和全氮含量增加明显大于边缘和外部,说明2种锦鸡儿在灌丛化过程中均出现了肥岛效应。2种锦鸡儿灌丛土壤全磷含量随土层深度的增加整体上表现为先降低后升高的趋势,局部有波动;土壤碱解氮含量在各发育阶段随土层深度的增加整体上均呈逐渐降低的趋势。(3)中间锦鸡儿灌丛的发育是伴随着土壤条件改善和地表草本植被共同作用进行的,土壤有机碳和全氮在灌丛尺度上呈现从土壤表层至下层养分改善同时进行,而柠条锦鸡儿灌丛土壤有机碳和全氮表现出自下而上的恢复演替特征。
英文摘要	This study selected Caragana korshinskii and Caragana intermedia,which commonly grow in desert steppe,as the research objects,to study the soil nutrient characteristics at different depths and positions of soil under the 2 types of Caragana during their different growing stages.The results showed that:(1)In desert steppe,the Caragana intermedia thickets were low but had dense canopies,while the Caragana korshinskii thickets were tall but their canopies were sparse.(2)During the thicketization of the 2 types of Caragana,soil organic carbon(SOC)and soil total nitrogen(STN)contents at different soil depths had significant differences with the increase of the areas of Caragana nebkhas(P<0.01).The contents of SOC and STN under the 2 types of Caraganathickets increased gradually with the increase of the areas of Caragananebkhas,and the increase extents were larger in the interior areas of 2 types of Caraganathickets than in the marginal and exterior areas,which indicated that"fertility island" effect occurred in thicketization of both Caraganatypes.With the increase of soil depth,the content of soil total phosphorus(STP)under 2 types of Caragana showed local fluctuations but generally decreased at first and then increased,while the content of soil alkali-hydrolysable nitrogen (SAN)generally decreased.(3)The thicketization of the Caragana intermedia was accompanied by the improvement of soil conditions and effects of herbaceous vegetation.The SOC and STN contents on the thicket scale increased from the surface soil layer to the subsoil and were also improved in the subsoil at the same time.The SOC and STN content under Caragana korshinskii presentedbottom-uprecovery succession characteristics.
中文关键词	荒漠草原 ; 中间锦鸡儿 ; 柠条锦鸡儿 ; 灌丛 ; 土壤养分
英文关键词	desert steppe Caragana intermedia Caragana korshinskii shrub soil nutrients
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:5601203
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233359
作者单位	宁夏大学, 西北土地退化与生态恢复国家重点实验室培育基地;;西北退化生态系统恢复与重建教育部重点实验室, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	潘军,安超平,吴旭东,等. 荒漠草原2种锦鸡儿灌丛化过程中土壤养分分布规律[J]. 宁夏大学,2015,29(6):131-136.
APA	潘军,安超平,吴旭东,周娟,米楠,&宋乃平.(2015).荒漠草原2种锦鸡儿灌丛化过程中土壤养分分布规律.水土保持学报,29(6),131-136.
MLA	潘军,et al."荒漠草原2种锦鸡儿灌丛化过程中土壤养分分布规律".水土保持学报 29.6(2015):131-136.