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首页> 外文期刊>Emirates Journal of Food and Agriculture >Acid soil amended in contaminated conditions. Effect on cultivated lettuces (Lactuca sativa var. longifolia)
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Acid soil amended in contaminated conditions. Effect on cultivated lettuces (Lactuca sativa var. longifolia)

机译：在受污染的条件下对酸性土壤进行了修正。对栽培的莴苣（莴苣变种）的影响

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The waste amendment is a common practice to improve crop production on acid soils. This work aims to study the effectiveness of water potabilization plant sludge and lamb manure in acid soils remediation and the possible absorption of metals in cultivated lettuces, as well as the elements?′distribution in roots and leaves after extra-contaminated irrigation. Al2(SO4)3-stabilized sludge, and lamb manure was added to an acid soil collected from Huasca de Ocampo, Hidalgo State, Mexico. The sludge (L), manure (M), control soil (C), unamended (S) and amended soils (SML) were characterized, and the metals?′ concentrations determined. The SML was prepared by adding 2.62 % M and 5.25% L to fill up 600 L tanks. Lettuces (Lactuca sativa var. longifolia) seeds were sown in S and SML, and irrigated once by metal salts solution (Na, Mg, Ca, Fe, Ni, Cu, Zn, and Cd as sulfates, 200 mg kg-1 each). Lettuce germinated and grew satisfactorily in the SML, but they grew slowly in the unamended acid S, and the roots were affected. Leaves and roots were regularly analyzed along three months, and the metal concentrations showed higher values in S than the ones in SML. Pollutants were available from S, as they were present in roots, and desorbed after 40 days. The elements were present in higher concentrations in lettuce roots than in leaves, as expected. Conclusions. a) Acid soils can be amended with potabilization plants wastes in mining zones, but pH must be controlled to prevent the availability of metals. b) The soil texture was the principal cause of infertility due to root damage, and wastes eliminate the impairment. c) The element concentrations present in the leaves were acceptable for human nutrition.
机译：废物改良是提高酸性土壤上农作物产量的一种普遍做法。这项工作旨在研究水化植物污泥和羔羊粪肥在酸性土壤修复中的有效性以及耕作的生菜中金属的可能吸收，以及过度污染灌溉后根和叶中元素的分布。将Al2（SO4）3稳定的污泥和羔羊粪便添加到从墨西哥伊达尔戈州Huasca de Ocampo收集的酸性土壤中。对污泥（L），肥料（M），对照土壤（C），未改良土壤（S）和改良土壤（SML）进行了表征，并确定了金属的浓度。通过添加2.62％的M和5.25％的L填充600 L的罐来制备SML。将莴苣（Lactuca sativa var.longifolia）种子播种在S和SML中，并用金属盐溶液（Na，Mg，Ca，Fe，Ni，Cu，Zn和Cd作为硫酸盐，每次200 mg kg-1）灌溉一次。 。生菜在SML中发芽并令人满意地生长，但在未修饰的酸S中生菜生长缓慢，根系受到影响。在三个月内定期分析了叶和根，S中的金属浓度高于SML中的金属浓度。污染物可从S处获得，因为它们存在于根中，并在40天后解吸。如所预期的那样，这些元素在莴苣根中的浓度高于在叶片中的浓度。结论。 a）酸性土壤可以用矿化区的碳酸化工厂废料进行修正，但必须控制pH值以防止金属的供应。 b）土壤质地是根系损害导致不育的主要原因，废物消除了这种损害。 c）叶片中存在的元素浓度对于人体营养而言是可以接受的。

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