Short-term effects of treated wastewater irrigation on Mediterranean calcareous soil
Short-term effects of treated wastewater irrigation on Mediterranean calcareous soil
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DOI：
10.1016/j.still.2010.11.004
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发表时间：
2011-03
影响因子：
6.5
通讯作者：
Alicia Morugán-Coronado;F. García‐Orenes;J. Mataix‐Solera;V. Arcenegui;J. Mataix‐Beneyto
中科院分区：
文献类型：
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作者：
Alicia Morugán-Coronado;F. García‐Orenes;J. Mataix‐Solera;V. Arcenegui;J. Mataix‐Beneyto
水资源短缺和土壤退化是地中海地区面临的两大环境问题。因此，水土保持战略是必要的。我们的目标是评估使用经处理的废水作为灌溉水源，以帮助缓解这些问题。在位于比亚尔（阿利坎特，西班牙东南部）的一个农业区，葡萄（葡萄属labrusca）的几个土壤肥力特性的短期影响进行了评估。三个处理：淡水（对照），和处理后的废水从二级和三级处理进行了评估2年。我们发现，土壤有机碳含量略有增加，在地块灌溉与二次处理。这些地块也增加了电导率（EC）和有效钠含量增加，由于高值的EC废水。实验室分析还显示，所有治疗的聚集体稳定性下降，可能是由于与每个灌溉剂量相关的润湿和干燥（WD）周期。这些WD周期也可以解释微生物生物量碳和基础土壤呼吸的变化。我们建议修改冲洗剂量，以减少施用量并增加施用频率，以避免聚集损失。我们还建议进行长期研究，以评估废水再利用的可行性。
Water shortage and soil degradation are the two most important environmental problems in the Mediterranean area. For this reason, strategies for soil and water conservation are necessary. Our objective was to evaluate the use of treated wastewater as an irrigation source to help alleviate these problems. Short-term effects on several soil fertility properties were evaluated in an agricultural area located at Biar (Alicante, SE Spain), where grapes (Vitis labrusca) are grown. Three treatments: fresh water (control), and treated wastewaters from secondary and tertiary treatment were evaluated for 2 years. We found a slight increase in soil organic carbon content in plots irrigated with the secondary treatment. These plots also had increased electrical conductivity (EC) and increased available Na content due to the high values of EC in wastewater. Laboratory analyses also show a decrease in aggregate stability for all treatments, presumably due to the wetting and drying (WD) cycles associated with each irrigation dose. These WD cycles may also explain changes in microbial biomass carbon and basal soil respiration. We recommend modifying the dose of irrigation in order to reduce the quantity applied and to increase the frequency of application to avoid the loss of aggregation. We also suggest long-term studies to assess the feasibility of wastewater reuse.