干旱区生态环境知识资源中心(Arid): 极端干旱环境下的胡杨细根分布与土壤特征

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	极端干旱环境下的胡杨细根分布与土壤特征
其他题名	Fine Root Distribution of Populus euphratica Oliv. and Its Relations with Soil Factors under Extremely Arid Environment
	木巴热克·阿尤普; 陈亚宁; 李卫红; 郝兴明; 马建新; 苏芮
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2011
卷号	31 期号:6 页码:1449-1458
中文摘要	以塔里木河下游的中龄胡杨为研究对象，采用开挖剖面分层取样法，对胡杨细根(D≤2mm)的空间分布以及与土壤特征因子之间的关系进行了分析。结果表明：①在长期干旱胁迫下，胡杨细根(D≤2mm)根长密度(RLD)、根表面积密度(SAD)从表层到地下100cm土层内，呈逐渐增加趋势，100~140cm土层内表现为减少的波动分布趋势；细根RLD、SAD集中分布在60~120cm土层内，约占0~140cm土层总细根RLD和SAD的74%以上；在水平方向上，距树干0.75~2.5m范围内，呈逐渐减少趋势，而在3.5~5.5m范围内呈波动的增加趋势。②胡杨细根(D≤2 mm)RLD和SAD与土壤总盐、土壤有效养分含量之间呈显著负相关关系，适合乘幂模型，与土壤含水率之间呈一定程度的正相关关系，适合三次曲线模型。
英文摘要	In order to understand the spatial distribution of P. euphratica fine roots(D≤2 mm)and its relation with soil factors under the extremely arid environment, a middle aged P. euphratica tree which grown at the lower reaches of Tarim River, Xinjiang, China, was selected as a sample tree. By trench profile method, 168 root and soil samples were collected. Results showed that: (1)P. euphratica fine root length density (FRLD), fine root surface area density (FRSAD) increased from the soil surface to 100-cm soil layer, and decreased from 100-cm to 140-cm layer; P. euphraticaFRLD, FRSAD was mainly concentrated on 60~120 cm soil depth, which accounted for over 74% of whole 0-140 cm soil profile’s FRLD, FRSAD. In the horizontal direction, FRLD and FRSAD showed a decreasing trend with a distance between 75-250 cm from the tree trunk, and increased with fluctuation at distance between 350-550 cm.(2)There were negative significant correlations between P. euphratica FRLD and soil total salt, soil available nutrient, and power model can best fit their relations; there was positive correlations between P. euphratica FRLD and soil water, but the correlation was not significant at P=0.05 level, and Cubic model can best fit their relations.
中文关键词	胡杨细根分布 ; 根长密度 ; 根表面积密度 ; 土壤含水率 ; 土壤特征因子
英文关键词	fine root distribution root length density root surface area density soil water content soil factor
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:4346777
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/2XILL650/227573
作者单位	中国科学院新疆生态与地理研究所, 荒漠与绿洲生态国家重点实验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	木巴热克·阿尤普,陈亚宁,李卫红,等. 极端干旱环境下的胡杨细根分布与土壤特征[J]. 中国科学院新疆生态与地理研究所,2011,31(6):1449-1458.
APA	木巴热克·阿尤普,陈亚宁,李卫红,郝兴明,马建新,&苏芮.(2011).极端干旱环境下的胡杨细根分布与土壤特征.中国沙漠,31(6),1449-1458.
MLA	木巴热克·阿尤普,et al."极端干旱环境下的胡杨细根分布与土壤特征".中国沙漠 31.6(2011):1449-1458.