干旱区生态环境知识资源中心(Arid): 黑河下游荒漠河岸林植物水分利用关系研究

Arid

	黑河下游荒漠河岸林植物水分利用关系研究
其他题名	Relationship among water use of different plants in Heihe River riparian forests
	陈小丽 1; 陈亚宁2 ; 陈亚鹏 2
来源期刊	中国生态农业学报
ISSN	1671-3990
出版年	2014
卷号	22 期号:8 页码:972-979
中文摘要	本文分析了荒漠河岸林植物水分来源, 辨明不同植物种的水分利用关系。根据植物水分来源的空间差异, 探讨植物种间关系, 为荒漠河岸林生态建设中的物种选择和搭配提供依据, 避免物种间因水分利用而过激竞争。结合对黑河下游植物胡杨、柽柳、苦豆子、黑刺、花花柴、骆驼蓬的木质部水及其潜在水源--土壤水和地下水的稳定氧同位素组成(deltaD、delta~(18)O)测定分析, 应用"同位素质量守恒多元"分析方法, 探讨了不同潜在水源对植物的贡献。结果表明: ①不同种类植物木质部deltaD、delta~(18)O值不同, 表明不同种类植物的吸水深度不同, 胡杨(幼苗)主要利用0~20 cm的土壤水, 柽柳主要吸收200~300 cm的深层土壤水, 黑刺主要利用0~20 cm的土壤水, 花花柴的主要吸水层位为50~100 cm, 骆驼蓬的主要吸水层位为0~20 cm, 而苦豆子主要利用0~5 cm的土壤水。②不同潜在水源对植物的贡献率因植物种类不同而异, 草本植物主要利用浅层土壤水, 灌木因植物种类不同, 水分来源有差异, 而乔木胡杨(幼苗)主要利用浅层土壤水; ③根据试验结果, 黑河下游胡杨(幼苗)与黑刺、骆驼蓬之间水分利用存在竞争关系, 胡杨(幼苗)、柽柳与其他物种之间水分利用可能存在协助关系。④蒸发是导致黑河下游土壤水分中氢、氧稳定性同位素富集的主要原因; 但随深度加大, 土壤水受地下水的影响加大, 稳定同位素值也相应发生改变。
英文摘要	This paper analyzed the sources of water for desert riparian forests and identified the sources of water for different plant species. In order to explore the relationships among the plant species, the spatial differences in the sources of water for different forest plants were analyzed. The study provided the basis for locating ecological desert river forest oases with mixed plant species and for protecting inter-species interactions by monitoring aggressive water use and competition. A multi-isotope mass balance analysis was used to explore the potential contributions of different sources of water to plant. The xylem water and potential water resources including soil water and groundwater, of Populus euphratica (seedlings), Tamarix karelinii, Sophora alopecuroides, Hippophae rhamnoides subsp. sinensis, Karelinia caspia and Peganum nigellastrum were analyzed by using stable oxygen isotope composition (deltaD, delta~(18)O) measurements and analyses. The results showed different deltaD, delta~(18)O values in xylem water of different types of plants. This suggested that different plants absorbed water from different depths. The analysis showed that the main soil depth of absorbed water was 0?20 cm for P. euphratica seedlings, 200?300 cm for T. karelinii, 0?20 cm for H. rhamnoides subsp. sinensis, 50?100 cm for K. caspia, 0?20 cm for P. nigellastrum and 0?5 cm for S. alopecuroides. The contribution rates of different potential water resources were different to different plant species. Herbaceous plants mainly used shallow soil water. While shrubs with different plant species had different sources of water, P. euphratica also mainly used the shallow soil water. Based on the results of the study, competitions were noted among P. euphratica seedlings, H. rhamnoides subsp. sinensis and P. nigellastrum in the Heihe River desert riparian forests in terms of water use. P. euphratica and T. karelinii enhanced the water use of each other in the study area. Evaporation of soil moisture was the cause of enriched stable isotopes of hydrogen and oxygen in the lower reaches of Heihe River. However, these enriched stable isotopes were diluted by groundwater with increasing soil depth. This caused corresponding changes in stable isotope values with increasing soil depth.
中文关键词	荒漠河岸林植物 ; 稳定性同位素 ; 木质部水 ; 潜在水源 ; 吸水深度 ; 黑河
英文关键词	Desert riparian forest Stable isotope Xylem water Potential water source Water absorption depth Heihe River
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5203376
来源机构	中国科学院新疆生态与地理研究所 ; 新疆农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232248
作者单位	1.新疆农业大学, 乌鲁木齐, 新疆 830052, 中国; 2.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	陈小丽,陈亚宁,陈亚鹏. 黑河下游荒漠河岸林植物水分利用关系研究[J]. 中国科学院新疆生态与地理研究所, 新疆农业大学,2014,22(8):972-979.
APA	陈小丽,陈亚宁,&陈亚鹏.(2014).黑河下游荒漠河岸林植物水分利用关系研究.中国生态农业学报,22(8),972-979.
MLA	陈小丽,et al."黑河下游荒漠河岸林植物水分利用关系研究".中国生态农业学报 22.8(2014):972-979.