Comparison of in situ extractors for sampling soil water
Comparison of in situ extractors for sampling soil water
复制标题
土壤水采样原位提取器的比较
DOI：
10.2136/sssaj1977.03615995004100030021x
复制
发表时间：
1977
期刊：
影响因子：
--
通讯作者：
D. R. Jackson
中科院分区：
文献类型：
--
作者：
M. Levin;D. R. Jackson
比较了Amicon中空纤维和多孔陶瓷杯蒸渗仪两种原位提取器对土壤水样品的采集效果。完整的土芯从牛毛草牧场，配有蒸渗仪和纤维在10和20厘米深。通过每周添加超过田间容量的增量水来沥滤岩心。排水后，使用蒸渗仪和纤维提取土壤溶液。土壤溶液中Ca和Mg的浓度在10 cm处大于20 cm处。提取器在收集过程中没有改变Ca，Mg或PO/sub 4/--P的浓度。这些研究表明，蒸渗仪和中空纤维是可行的设备，用于提取土壤水样品。多孔陶瓷杯蒸渗仪是最好的田间地块，而空心纤维是完整的土芯的优势。中空纤维技术的一个主要优点是安装所需的土壤位移小。
Comparisons were made of two in situ extractors for collection of soil water samples: Amicon hollow fibers and porous ceramic cup lysimeters. Intact soil cores removed from a fescue pasture were fitted with lysimeters and fibers at 10 and 20 cm depth. Cores were leached by adding increments of water in excess of field capacity weekly. After drainage, soil solutions were extracted using lysimeters and fibers. Concentrations of Ca and Mg in soil solutions were greater at 10-cm than at 20-cm soil depths. Neither extractor altered the concentrations of Ca, Mg, or PO/sub 4/--P during collection. These studies suggest that lysimeters and hollow fibers are viable devices for extracting of soil water samples. Porous ceramic cup lysimeters are preferable for field plots, while hollow fibers are advantageous for intact soil cores. A major advantage of the hollow fiber technique is the small soil displacement required for installation.