毛乌素沙地南缘4种灌木生长季水分利用来源分析  

Analysis of Water Sources Utilized by Four Shrubs During the Growing Season in the Southern Margin of Mu Us Sandy Land

作　　者：傅旭 吴永胜[2] 张颖娟[1,3] FU Xu;WU Yong-sheng;ZHANG Ying-juan(College of Life Science and Technology,Inner Mongolia Normal University,Hohhot 010022,China;Pastoral Water Resources Research Institute,Ministry of Water Resources,Hohhot 010020,China;Journal Editorial Department,Inner Mongolia Normal University,Hohhot 010022,China)

机构地区：[1]内蒙古师范大学生命科学与技术学院,内蒙古呼和浩特010022 [2]水利部牧区水利科学研究所,内蒙古呼和浩特010020 [3]内蒙古师范大学学报编辑部,内蒙古呼和浩特010022

出　　处：《内蒙古师范大学学报（自然科学汉文版）》2020年第3期245-250,共6页Journal of Inner Mongolia Normal University(Natural Science Edition)

基　　金：中国水利水电科学研究院资助项目(MK2018J08)。

摘　　要：为提升毛乌素沙地防风固沙植被体系的稳定性,利用氢氧稳定同位素法,对不同类型(油蒿、羊柴、紫穗槐、沙地柏)固沙灌木生长季潜在水分来源及水分利用特征进行研究。结果表明:(1)不同类型固沙植被恢复区土壤水分含量具有较大差异,生长旺季显著高于其他两时期。在生长季初期和生长旺季,土壤水分含量随土层深度的增加表现出先增加后减少的趋势,而生长季末期土壤含水量随着土层的增加变化不明显或有所减少;(2)不同类型固沙植被恢复区土壤水和植物样中δD值差异明显,表层土壤水中δD值较集中,而深层土壤水中其含量之间差异比较大;(3)植物水分利用来源和比例的分析表明,油蒿生长季水分利用来源比较均匀,在生长旺盛期偏重于利用浅表层土壤水;紫穗槐和沙地柏主要利用深层土壤水;羊柴对深层和浅层土壤水分均有利用。为避免固沙植物水分利用之间发生竞争,紫穗槐和沙地柏不宜混合搭配,而油蒿和上述两个植物之间可以考虑进行混合搭配。To provide the fundamental basis for improving stability of the wind-breaking and sand-fixing vegetation system in the Mu Us Sandy Land,stable hydrogen and oxygen isotopes were used to study the potential water sources and utilizing characteristics of different types of sand-fixing shrubs(Artemisia ordosica、Hedysarum mongdicum、Amorpha fruticosa、Sabina vulgaris)in the growing season.The results showed that:(1)the soil water content in restoration areas of different types of sand-fixing vegetation was quite different and it was significantly higher in the growing season than in the other two periods,particularly,it increased first and then decreased with the increasing of soil layer depth at the beginning of growing season and growing season,however,the soil water content did not change significantly,or decreased with the increase of soil layer depth at the end of growing season;(2)theδD values of soil moisture and plant samples in restoration areas of different types of sand-fixing vegetation were significantly different,and theδD value of moisture in surface soil was centered relatively and less variance,While the difference of it among deep soil become greater;(3)the analysis of water sources and its proportion to be utilized by plants revealed that the Artemisia ordosica was more evenly used the water from every possible source during the growing season,but used preferentially the water from the soil of shallow surface during the vigorous growth period;and Amorpha fruticosa and Sabina vulgaris used mainly moisture from soil of deep layer;however,the Hedysarum mongdicum used moisture from both deep and shallow layer.From the results above mentioned,we suggested that to avoid water competition,Amorpha fruticosa was not suitable to intercrop with Sabina vulgaris but Artemisia ordosica was suitable to intercrop with both Amorpha fruticosa or Sabina vulgaris.

关 键 词：毛乌素沙地 氢氧同位素 水分来源 固沙植被 

分 类 号：Q948[生物学—植物学]