盐生荒漠土壤水稳定氢、氧同位素组成季节动态

doi:10.7522/j.issn.1000-694X.2013.00295

摘要/Abstract

摘要： 对准噶尔盆地东南缘降水和土壤水稳定氢、氧同位素组成（δ¹⁸O和δD）进行了测定，分析了降水中δ¹⁸O和δD值的季节变化规律，表层土壤水中δ¹⁸O和δD值对降水脉冲的动态响应以及不同深度土壤水中δ¹⁸O和δD值的变化特征。结果表明：该区域大气降水线为δD=7.691δ¹⁸O+4.606；降水与表层土壤水中δ¹⁸O和δD值表现出明显的季节变化特征；表层土壤水中δ¹⁸O和δD值、质量含水量对降水脉冲响应显著，且不同量级的降水导致不同程度的响应。利用LSD法对0~300 cm土层内土壤水中δ¹⁸O和δD值进行多重比较分析，可将土壤在垂直方向上分为3层，表层（0~50 cm）土壤水分活跃，稳定同位素值随深度的增加而迅速减小；中间层（50~180 cm）土壤水分相对活跃，既受到降水入渗和蒸发作用的影响，也有地下水的补给；深层（180~300 cm）水分来源稳定，土壤水中δ¹⁸O和δD值基本不变。

关键词: 准噶尔盆地, 土壤水分, 稳定氢、氧同位素, 降水脉冲

Abstract: δ¹⁸O and δD in precipitation and soil water were measured at a saline desert site in the southeastern Junggar Basin, China, during the growing season in 2012. The seasonal dynamic of δ¹⁸O and δD in precipitation, topsoil water isotope response to pulse rainfall events and profile characteristic of soil water δ¹⁸O and δD were analyzed. The results showed that the equation off the local meteoric water line (LMWL) was δD=7.691 δ¹⁸O+4.606, the values of δ¹⁸O and δD in precipitation and topsoil water had obvious seasonal fluctuations. The surface soil water isotope and content responded significantly to pulse rainfall and different magnitudes of precipitation could trigger different degrees of response. Through LSD's multiple comparison, we distinguished three layers in soil profile of 0 300 cm. The upper layer (0-50 cm) had the most active soil moisture and the values of δ¹⁸O and δD reduced quickly with the depth. The middle layer (50-180 cm) had the relatively active soil moisture with stable isotope values which were influenced not only by precipitation infiltration and soil evaporation, but also by groundwater recharge. The lower layer (180-300 cm) had quasi-stable soil water content, the values of δ¹⁸O and δD were related to the stable shallow groundwater water.

Key words: Junggar Basin, soil water, δ¹⁸O and δD, pulse precipitation

中图分类号:

S152.7+5

周海, 郑新军, 唐立松, 李彦. 盐生荒漠土壤水稳定氢、氧同位素组成季节动态[J]. 中国沙漠, 2014, 34(1): 162-169.

Zhou Hai, Zheng Xinjun, Tang Lisong, Li Yan. Analysis on Seasonal Dynamics of δ¹⁸O and δD in Soil Water at a Saline Desert Site in the Southeastern Junggar Basin[J]. JOURNAL OF DESERT RESEARCH, 2014, 34(1): 162-169.

参考文献

[1] 邵明安,王九全,黄明斌.土壤物理学[M].北京:高等教育出版社,2006:47-48.
[2] 林光辉.稳定同位素生态学:先进技术推动的生态学新分支[J].植物生态学报,2010,34 (2):119-122.
[3] Reynolds J F,Kemp P R,Ogle K,et al.Modifying the pulse-reserve paradigm for deserts of North America:precipitation pulses,soil water,and plant responses[J].Oecologia,2004,141:194-210.
[4] Robertson J A,Gazis C.An oxygen isotope study of seasonal trends in soil water fluxes at two sites along a climate gradient in Washington State (USA)[J].Journal of Hydrology.2006,328:375-38.
[5] Clark I D,Fritz P.Environmental Isotopes in Hydrogeology[M].Bocaaton,US:Lewis Publishers,1997.
[6] Mathieu R,Bariac T.An isotopic study (²H and ¹⁸O) of water movements in clayey soils under a semiarid climate[J].Water Resource Research,1996,32:779-789.
[7] Gazis C,Feng X H.A stable isotope study of soil water:evidence for mixing and preferential flow paths [J].Geoderma,2004,119(1/2):97-111.
[8] 吉小敏,宁虎森,梁继业,等.不同水分条件下梭梭和多花柽柳苗期光合特性及抗旱性比较[J].中国沙漠,2012,32(2):399-406.
[9] 曹生奎,冯起,司建华,等.极端干旱区胡杨生长季水分利用效率变化特征研究[J].中国沙漠,2012,32(3):724-729.
[10] Allison G B,Barnes C J,Hughes M W.The distribution of deuterium and ¹⁸O in dry soil[J].Experimental Journal of Hydrology,1983,64 :377-397.
[11] Zimmermann U,Munnich K O,Roether W,et al.Tracers determine movement of soil moisture and evapotranspiration[J].Science,1966,152:346-347.
[12] 余绍文,孙自永,周爱国,等.用D、¹⁸O同位素确定黑河中游戈壁地区植物水分来源[J].中国沙漠,2012,32(3):717-723.
[13] 田立德,姚檀栋,M·Tsuj Imura,等.青藏高原中部土壤水中稳定同位素变化[J].土壤学报,2002,39 (3):289-295.
[14] 王仕琴,宋献方,肖国强,等.基于氢氧同位素的华北平原降水入渗过程[J].水科学进展,2009,20(4):495-501.
[15] 程立平,刘文兆.黄土塬区几种典型土地利用类型的土壤水稳定同位素特征[J].应用生态学报,2012,23(3):651-658.
[16] 任崴,罗廷彬,王宝军,等.新疆生物改良盐碱地效益研究[J].干旱地区农业研究,2004,22(4):211-214.
[17] Craig H.Isotopic variations in meteoric waters[J].Science,1961,133:1702-1703.
[18] 郑淑慧,侯发高,倪宝玲.我国大气降水的氢氧同位素研究[J].科学通报,1983,28(3):801-806.
[19] Araguás-Araguás L,Froehlich K,Rozanski K.Deuterium and oxygen-18 isotope composition of precipitation and atmospheric moisture[J].Hydrological Processes,2000,14 (8):1341-1355.
[20] 张应华,仵彦卿.黑河流域中上游地区降水中氢氧同位素研究[J].冰川冻土,2009,31(1):34-39.
[21] 刘鑫,宋献方,夏军,等.黄土高原岔巴沟流域降水氢氧稳定同位素特征及水汽来源探讨[J].资源科学,2007,29(3):59-66.
[22] Araguás-Araguás L,Froehlich K,Rozanski K.Stable isotope composition of precipitation over Southeast Asia[J].Journal of Geophysical Research,1998,103(28):721-742.
[23] Mook W G.Environmental isotopes in the hydrological cycle:principles and applications[C]//IAEA Technical Documents in hydrology.Paris:UNESCO,2001.
[24] Yurtsever Y,Gat J R.Atmospheric waters[M]//Gat J R,Gonfiantini R.Stable Isotope Hydrology:Deuterium and Oxygen-18 in the Water Cycle.Vienna:International Atomic Energy Agency,1981:103-142.
[25] Danssaard W.Stable isotopes in precipitation[J].Tellus,1964,16(4):436-468.
[26] 王宝鉴,黄玉霞,陶健红,等.西北地区大气水汽的区域分布特征及其变化[J].冰川冻土,2006,28(1):15-21.
[27] 章新平,刘晶淼,孙维贞,等.中国西南地区降水中氧稳定同位素比率与相关气象要素之间关系的研究[J].中国科学(D辑),2006,36(9):850-859.
[28] Weltzin J F,Tissue D T.Resource pulses in arid environments-patterns of rain,patterns of life[J].New Phytologist,2002,157:171-173.
[29] 魏雅芬,郭柯,陈吉泉.降雨格局对库布齐沙漠土壤水分的补充效应[J].植物生态学报,2008,32( 6):1346-1355.
[30] 郭柯,董学军,刘志茂.毛乌素沙地沙丘土壤含水量特点--兼论老固定沙地上油蒿衰退原因[J].植物生态学报,2000,24( 3):375-379.
[31] Schwinning S,Sala O E.Hierarchy of responses to resource pulses in and semiarid ecosystem[J].Oecologia,2004,141:211-220.
[32] Saxena R K.Seasonal variations of oxygen-18 in soil moisture and estimation of recharge in esker and moraine formations[J].Nordic Hydrology,1984,15:235-242.
[33] Barnes C J,Allison G B.The distribution of deuterium and ¹⁸O in dry soils:3.theory for non-isothermal water movement[J].Journal of Hydrology,1984,74:119-135.
[34] 张华安,王乃昂,李卓仑,等.巴丹吉林沙漠东南部湖泊和地下水的氢氧同位素特征[J].中国沙漠,2011,31(6):1623-1629.
[35] Barnes C J,Allison G B.Water movement in the unsaturated zone using stable isotopes of hydrogen and oxygen[J].Journal of Hydrology,1988,100:143-176.
[36] 王孟本,李洪建.晋西北黄土区人工林土壤水分动态的定量研究[J].生态学报,1995,15(2):178-184.