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首页> 外文期刊>Agriculture, Ecosystems & Environment: An International Journal for Scientific Research on the Relationship of Agriculture and Food Production to the Biosphere >Soil solution concentrations and chemical species of copper and zinc in a soil with a history of pig slurry application and plant cultivation
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Soil solution concentrations and chemical species of copper and zinc in a soil with a history of pig slurry application and plant cultivation

机译：有猪粪施用和植物栽培史的土壤溶液中铜和锌的浓度和化学物种

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摘要

Successive pig slurry applications may increase soil copper(Cu) and zinc (Zn) concentrations and change the proportions of free chemical species in solution when combined with plant cultivation. The aim of this study was to assess the soluble, available,,and total Cu and Zn concentrations and the distribution of their chemical species in the solution in a Hapludalf soil with a history of pig slurry application and plant cultivation. The study was conducted in undisturbed soil columns that originated from an 8-year-long experiment conducted at the experimental unit of the Federal University of Santa Maria in Santa Maria, southern Brazil. The soil was a Typic Hapludalf soil fertilized with pig slurry at rates of 0, 20, 40, and 80 m(3) ha(-1). The soil was collected from depth intervals of 0-0.05, 0.05-0.1, 0.1-0.2, 0.2-0.3, 03-0.4, and 0.4-0.6 m before and after cultivation with black oat and maize in a greenhouse to assess the total and available Cu and Zn concentrations and to extract the solution. The soil solution concentrations of the main cations, anions, and dissolved organic carbon (DOC) and pH were assessed. The distribution of Cu and Zn chemical species was assessed using the Visual Minteq software. The history of 21 pig slurry applications increased the concentration of Cu and Zn in surface soil intervals, but the concentration of Cu also increased in the soil solution at depth. The phytotoxicity caused by Cu and Zn may not occur even after several years of pig slurry application because the plants provide soil conditions in which chemical species complexed with dissolved organic carbon predominate and Cu and Zn in free forms are present only in small amounts. (C) 2015 Elsevier B.V. All rights reserved.
机译：连续施用猪粪浆可能会增加土壤铜（Cu）和锌（Zn）的浓度，并改变与植物栽培相结合的溶液中游离化学物质的比例。这项研究的目的是评估具有猪粪便施用和植物栽培历史的哈普达夫土壤中可溶性，可利用的和总的铜和锌浓度以及溶液中化学物种的分布。这项研究是在未经扰动的土壤柱中进行的，该土壤柱是在巴西南部圣塔玛丽亚的联邦圣塔玛丽亚联邦大学实验单位进行的长达8年的实验。土壤是典型的Hapludalf土壤，以0、20、40和80 m（3）ha（-1）的速度与猪粪一起施肥。在温室中用黑燕麦和玉米种植之前和之后，分别从0-0.05、0.05-0.1、0.1-0.2、0.2-0.3、03-0.4和0.4-0.6 m的深度间隔收集土壤，以评估土壤的总量和可用铜和锌的浓度提取溶液。评估了土壤溶液中主要阳离子，阴离子以及溶解的有机碳（DOC）和pH的浓度。使用Visual Minteq软件评估了铜和锌化学物质的分布。施用21种猪粪便的历史增加了土壤表层土壤中Cu和Zn的浓度，但深层土壤溶液中Cu的浓度也有所增加。即使经过数年的猪粪施用，也可能不会发生由铜和锌引起的植物毒性，因为植物提供了土壤条件，其中与溶解的有机碳络合的化学物种占优势，游离态的铜和锌仅少量存在。 （C）2015 Elsevier B.V.保留所有权利。

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