真空蒸馏提取与原位采集对土壤水氢氧稳定同位素值比值的影响
发布时间：2018-07-17 08:10
【摘要】：为了研究不同采样方法对采集的土壤水氢氧稳定同位素比值的影响,设计了室内降水入渗模拟试验,收集土柱底部出流水、土壤溶液采样器原位采集10cm、40cm、70cm、100cm处的土壤水,在相同层位采集土壤样品并采用真空蒸馏法提取土壤水。通过样品的氢氧稳定同位素比值对比分析可知,降水入渗干燥的土壤过程中土颗粒优先吸附轻同位素,第一个收集的水分具有最正的氢氧稳定同位素比值;真空蒸馏法提取的土壤水是土壤吸湿水和入渗水分的混合,土壤溶液采样器原位采集的土壤水代表土壤中流动的水分,此水分是土壤中可被有效利用的水分。
[Abstract]:In order to study the influence of different sampling methods on the stable isotopic ratio of hydrogen and oxygen in soil water, a simulated experiment of precipitation infiltration was designed. Soil samples were collected at the same layer and soil water was extracted by vacuum distillation. Through the comparison and analysis of the hydrogen and oxygen stable isotopic ratios of the samples, it can be seen that the soil particles preferentially adsorb light isotopes in the process of precipitation infiltration and drying, and the first water collected has the most positive hydrogen and oxygen stable isotopic ratios. The soil water extracted by vacuum distillation is a mixture of soil moisture absorption and infiltration water. Soil water collected in situ by a soil solution sampler represents the water flowing in the soil, which can be effectively used in the soil.
【作者单位】： 南京工程学院环境工程学院;河海大学水文水资源与水利工程科学国家重点试验室;
【基金】：南京工程学院引进人才科研启动基金(YKJ201327)
【分类号】：S152.7
本文编号：2129743
[Abstract]:In order to study the influence of different sampling methods on the stable isotopic ratio of hydrogen and oxygen in soil water, a simulated experiment of precipitation infiltration was designed. Soil samples were collected at the same layer and soil water was extracted by vacuum distillation. Through the comparison and analysis of the hydrogen and oxygen stable isotopic ratios of the samples, it can be seen that the soil particles preferentially adsorb light isotopes in the process of precipitation infiltration and drying, and the first water collected has the most positive hydrogen and oxygen stable isotopic ratios. The soil water extracted by vacuum distillation is a mixture of soil moisture absorption and infiltration water. Soil water collected in situ by a soil solution sampler represents the water flowing in the soil, which can be effectively used in the soil.
【作者单位】： 南京工程学院环境工程学院;河海大学水文水资源与水利工程科学国家重点试验室;
【基金】：南京工程学院引进人才科研启动基金(YKJ201327)
【分类号】：S152.7
【相似文献】
相关期刊论文 前1条
1 王涛;包为民;胡海英;瞿思敏;黄琳煜;;氢氧稳定同位素在土壤蒸发规律研究中应用[J];中国农村水利水电;2008年04期
相关博士学位论文 前1条
1 王晶晶;土壤作物系统中水分及其氢氧稳定同位素的动态与农田耗水特征[D];中国农业大学;2015年
相关硕士学位论文 前1条
1 刘文茹;提取方式和测定方法对氢氧稳定同位素的影响及其在花生作物水源解析的应用[D];南京农业大学;2013年
，本文编号：2129743
本文链接：https://www.wllwen.com/kejilunwen/nykj/2129743.html
