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首页> 外文期刊>Soil Science Society of America Journal >Hydrologic Gradients and Topsoil Additions Affect Soil Properties of Virginia Created Wetlands
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Hydrologic Gradients and Topsoil Additions Affect Soil Properties of Virginia Created Wetlands

机译：水文梯度和表土添加影响弗吉尼亚州人工湿地的土壤特性

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摘要

As the role of soil properties in the development of created wetlands (CWs) has not received adequate attention in regulatory or scientific communities, this study was conducted to evaluate the development of soil properties in 11 CWs in Virginia ranging from 4 to 16 yr since creation. Six of the 11 sites received at least 15 cm of topsoil (TS) while the other five sites received no topsoil (No TS). Cores collected from wet, intermediate, and dry positions at each site were analyzed for moisture, bulk density (Db), soil organic matter (SOM), texture, water-holding capacity (WHC), P sorption index (PSI), and microbial biomass C (MBC). Both positions along the hydrologic gradient and topsoil status were hypothesized to be significant factors in explaining the variability of the measured soil properties. Soil moisture decreased significantly while Db increased significantly from wet to dry zones. Moisture, WHC, and PSI were all significantly elevated in certain zones of TS compared with No TS sites. Soil organic matter had significant Spearman correlations with all other measured soil properties, revealing that this parameter was an important indictor of soil quality. In addition, sites with high mean moisture, SOM, and PSI values all received TS; conversely, the site with the lowest mean moisture and SOM content did not receive TS. Thus, amending CW soils with TS appeared to be an effective strategy for increasing soil moisture, WHC, and PSI. Whenever possible, practices such as TS or organic amendments should be employed, especially if wetland creation involves excavation into subsoils with low SOM and high Db.
机译：由于土壤性质在人工湿地（CWs）的开发中的作用尚未得到监管部门或科学界的足够重视，因此本研究旨在评估 < / sup>自创建以来，弗吉尼亚州11个连续波的土壤性质的发展范围为 ，范围为<16年。 11个地点中的六个地点接受 至少15 cm的表土（TS），而其他五个地点则接受 无表土（No TS）。分析每个站点从湿，中间， 和干燥位置收集的岩心的水分，体积 密度（D b ）和土壤有机质（ SOM），质地，持水量（WHC），P吸附指数（PSI）和微生物生物量 C（MBC）。假设沿水文梯度和表层土壤 状态的两个位置都是解释 所测土壤性质变异性的重要因素。从 湿区到干旱区，土壤水分 显着下降，而D b 显着增加。与无TS部位相比，TS的某些区域的水分，WHC和PSI均显着升高。土壤 有机物与所有其他 测量的土壤性质具有显着的Spearman相关性，表明该参数 是土壤质量的重要指标。另外，平均湿度，SOM和PSI值均较高的站点 均收到TS； 相反，平均湿度和SOM含量最低的站点 未收到TS。因此，用TS修正CW土壤似乎是增加土壤水分，WHC， 和PSI的有效策略。尽可能采用TS或有机物 修正法，特别是如果湿地创建 将开挖涉及到低SOM和高D b 的底土中时。 。

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    《Soil Science Society of America Journal》 |2004年第6期|2069-2077|共9页
  • 作者

    G. L. Bruland; C. J. Richardson;

  • 作者单位

    Soil and Water Science Dep., Univ. of Florida, Institute of Food and Agricultural Sciences, 2169 McCarty Hall, P.O. Box 110290, Gainesville, FL 32611-0290,Duke Univ. Wetland Center, Nicholas School of the Environment and Earth Sciences, Box 90333, Durham, NC 27708-0333;

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