Water using source of a perennial semi-shrub Reaumuria soongorica as measured by water isotopes in Gobi Desert, Inner Mongolia, China
文献类型： 外文期刊
作者： Liu, R. X. 1 ; Ma, Y. M. 1 ; Liu, B. 1 ; Chen, S. C. 1 ; Hu, H. F. 2 ; Mi, Y. J. 1 ;
作者机构： 1.Inner Mongolia Agr Univ, Coll Desert Control Sci & Engn, 306 Zhaowuda Rd, Hohhot 010010, Inner Mongolia, Peoples R China
2.Chinese Acad Agr Sci, Inst Grassland Res, 120 East Wulanchabu Rd, Hohhot 010018, Inner Mongolia, Peoples R China
关键词： Gobi desert; Isotopes; Reaumuria soongorica; Water content; Water potential; Water using sources
期刊名称：JOURNAL OF ENVIRONMENTAL BIOLOGY （ 影响因子：0.7； 五年影响因子：0.7 ）
ISSN： 0254-8704
年卷期： 2022 年 43 卷 4 期
页码：
收录情况： SCI
摘要： Aim: Reaumuria soongorica plays significant role in wind induced soil erosion and combating desertification due to its unique adaptation mechanisms in the Gobi Desert. This study was conducted to investigate its water using sources revealed by hydrogen and oxygen stable isotope as one of its adaptive strategies in Gobi Desert. Methodology: Field experiment was designed in Alashan Desert, China to evaluate the soil and plant water conditions from two R. soongorica sampling sites. Plant and soil water potential were measured by using the Psypro dew point water potential meter equipped with C-52 sample chamber. Water isotopes was measured based on hydrogen (Delta H-2) and oxygen (delta O-18) stable isotopes. Results: The results showed that the highest soil moisture content in both sites at 70 similar to 100 cm was 2.08% and 1.28%, respectively. The average leaf water content of R. soongorica ranged from 18.032% to 38.063% and the average water potential of its root, stem, and leaf was -8.89 and -9.71 MPa for site I and II, respectively. Delta H-2 and delta O-18 stable isotope analysis showed that soil water source for R. soongorica for both sites was from layer of 70 similar to 100 cm. Interpretation: R. soongorica uses water mainly from the medium soil layer and the results uncover its water using strategies as one of adaptive mechanism in Gobi Desert.
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