干旱区生态环境知识资源中心(Arid): 夏季高寒沙地乌柳林的水分来源

Arid

	夏季高寒沙地乌柳林的水分来源
其他题名	Water source of Salix cheilophila plantation in alpine sandy land in summer
	朱雅娟; 齐凯; 庞志勇
来源期刊	南京林业大学学报. 自然科学版
ISSN	1000-2006
出版年	2019
卷号	43 期号:1 页码:91-97
中文摘要	【目的】共和盆地位于青藏高原的半干旱区,属于典型的高寒沙地,是青海省土地荒漠化最严重的区域之一.乌柳是当地退化草地恢复的主要树种,乌柳林的稳定性是其可持续管理的关键.研究夏季乌柳林的水分来源以分析它们在半干旱区能否维持稳定性.【方法】利用稳定氢、氧同位素技术研究了夏季4个林龄乌柳林的水分来源,比较乌柳林的木质部水分与各潜在水源的稳定氢、氧同位素值,确定7月乌柳林主要利用的水源.【结果】不同林龄乌柳林可利用不同深度的土壤水或地下水.其中,2年生乌柳林主要利用地表下25 cm的土壤水,占总水源的75.5%; 10年生乌柳林主要利用地表下25~ 75 cm的土壤水和地下水,占总水源的73.9%; 20年生乌柳林主要利用地表下50~ 75 cm的土壤水和地下水,占总水源的67.7%; 30年生乌柳林主要利用地表下25 cm的土壤水和地下水,占总水源的69.6%.随着林龄的增加(从10 a到30 a), 乌柳林对地下水的依赖性逐渐增强.【结论】乌柳林通过调整水分利用策略来适应共和盆地的半干旱气候.利用稳定的深层土壤水和地下水有助于长期维持乌柳林稳定性,建议将乌柳作为高寒沙地和其他半干旱地区退化植被恢复的主要树种推广.
英文摘要	【Objective】The Gonghe Basin is located in a semiarid zone of the Qinghai-Tibet Plateau,which is a typical alpine sandy region. It is one of the most severely desertified areas of Qinghai Province. The Salix cheilophila is mainly used in the restoration of degraded grassland in the interdune areas of the Gonghe Basin. The stability of S. cheilophila plantations is dependent on sustainable management. Our objective was to evaluate whether the long-term stability of S. cheilophila plantations could be maintained in the semiarid zone by analyzing their water sources during summer.【Method 】The water sources of different S. cheilophila plantations of different ages were studied through stable hydrogen and oxygen isotope techniques.The stable hydrogen and oxygen isotope ratios of S. cheilophila xylem water were compared with those of soil water at different depths( 25,50,75,100,150,200 cm) and ground water to determine the main water source for S. cheilophila plantations of different ages in July.【Result】The S. cheilophila plantations of different ages mostly used different depths of soil water or ground water. At two years of age,the S. cheilophila plantations mainly used 25 cm soil water,which accounted for 75.5% of its total water source. At ten years of age,the S. cheilophila plantation mainly used 25-75 cm soil water and ground water,which accounted 73.9% to its total water source. At twenty years of age,the S. cheilophila plantation mainly used 50-75 cm soil water and ground water,which accounted 67.7% of its total water source. At thirty years of age,the S. cheilophila plantation mainly used 25 cm soil water and ground water,which accounted 69.6% to its total water source,respectively. With the increase in plantation age,the dependence of the S. cheilophila plantations on ground water increased,particularly from 10 years to 30 years of age.【Conclusion】The water use strategy of the S. cheilophila plantations adjusted to adapt to the semiarid climate. The long-term stability of the plantations was maintained by use of stable ground water or deep soil water in the Gonghe Basin. It is suggested that the S. cheilophila could be widely used in the restoration of degraded alpine sandy regions and other semiarid zone.
中文关键词	高寒沙地 ; 乌柳林 ; 水分来源 ; 稳定同位素 ; 林龄
英文关键词	alpine sandy land Salix cheilophila plantation water source stable isotope plantation age
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Forestry
WOS研究方向	Forestry
CSCD记录号	CSCD:6419219
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/316329
作者单位	朱雅娟, 中国林业科学研究院荒漠化研究所, 北京 100091, 中国.; 齐凯, 中国林业科学研究院荒漠化研究所, 北京 100091, 中国.; 庞志勇, 天津大学表层地球系统科学研究院, 天津 300072, 中国.
推荐引用方式 GB/T 7714	朱雅娟,齐凯,庞志勇. 夏季高寒沙地乌柳林的水分来源[J],2019,43(1):91-97.
APA	朱雅娟,齐凯,&庞志勇.(2019).夏季高寒沙地乌柳林的水分来源.南京林业大学学报. 自然科学版,43(1),91-97.
MLA	朱雅娟,et al."夏季高寒沙地乌柳林的水分来源".南京林业大学学报. 自然科学版 43.1(2019):91-97.