Relationships between extractable copper, soil properties and copper uptake by wild plants in vineyard soils
Relationships between extractable copper, soil properties and copper uptake by wild plants in vineyard soils
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DOI：
10.1016/s0269-7491(98)00120-1
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发表时间：
1998-01-01
影响因子：
8.9
通讯作者：
Remy, JC
中科院分区：
文献类型：
--
作者：
Brun, LA;Maillet, J;Remy, JC
葡萄园土壤全铜含量的增加主要是由于多次使用铜杀菌剂防治葡萄霜霉病所致。在法国地中海地区（埃罗省），在葡萄园土壤上层观察到的总铜含量范围为31至250毫克公斤（-1），而林地地块为14至29毫克公斤（-1）。土壤Cu的深度分布表明，除2个剖面Cu在深层富集外，Cu输入基本集中在表层。EDTA、DTPA和醋酸铵提取态铜与土壤全铜呈高度相关，与样地野生植物铜含量呈弱相关。这些观察结果表明，这些提取方法是有限的兴趣，用于预测铜污染土壤中的植物铜的有效性。相比之下，CaCl（2）可提取态Cu与全量Cu无相关性，主要受土壤pH值的影响，随着pH值的升高，可提取态Cu的数量减少。对于中性至酸性pH的土壤，CaCl（2）提取态Cu与野生植物中观察到的含量相关。因此，它似乎是预测葡萄园土壤中植物有效铜的最佳方法。(C)1998爱思唯尔科技有限公司版权所有。
The repeated use of Cu fungicides to control vine downy mildew has been responsible for the heavy increase of total Cu content in vineyard soils. In a French Mediterranean region (Departement de l'Herault), the total Cu content observed in the upper layer of vineyard soils ranged from 31 to 250 mg kg(-1), versus 14 to 29 mg kg(-1) in woodland plots. Cu distribution with soil depth showed that Cu input from Cu treatment was essentially concentrated in the upper layers, except for two soil profiles which presented Cu enrichments in deep horizons. EDTA, DTPA and ammonium acetate-extractable Cu were highly correlated with soil total Cu, and were weakly correlated with Cu content in wild plants grown in the plots. These observations suggested that these extraction methods are of limited interest for predicting the availability of Cu to plants in Cu-contaminated soils. In comparison, CaCl(2) extractable Cu was not correlated to total Cu and depended mainly on soil pH. When the soil pH increased the quantities of extractable Cu decreased. For soil with neutral to acid pH, CaCl(2) extractable Cu was correlated with the contents observed in wild plants. It thus appeared as the best way of predicting plant-available Cu in vineyard soils. (C) 1998 Elsevier Science Ltd. All rights reserved.