Phytoremediation potential of two maize varieties cultivated on metal-particulate-contaminated soil

Ghana journal of agricultural science Pub Date : 2019-07-31 DOI:10.4314/gjas.v54i1.4

M. Adewole, B. Oyebanji, K. Igbekele

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引用次数: 4

Abstract

Arbitrary cultivation of vacant land, even within the periphery of cottage industries in developing countries, particularly in Nigeria, is on the increase. Two maize varieties [ART98/SW1 (protein) and BR-9928-DMR-SR-Y (non-protein)] were planted within the vicinity of a metal recycling plant in Ile-Ife, Nigeria to assess the metal removal potentials of these maize cultivars. The experiment was conducted in two locations, each per maize variety and laid out in a randomised complete block design. Two biochars produced from maize stover and Milicia exelsa, each at 10 t ha-1 were used as soil amendments. Metal uptake by the two maize varieties was in the order: root > shoot > grain, with protein maize having higher bioconcentration factors: Fe 86.82, Zn 1.19, Cu 4.53, Mn 2.42 and Pb 0.15, and hence, a pathway through which animals, including humans could ingest these metals. It was concluded that maize crop is a bioaccumulator of metals in soil, and protein maize cultivar removes more metals than non-protein maize. Keywords: Biochar; farm waste; heavy metal; maize; particulate matter; remediation

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两个玉米品种在金属颗粒污染土壤上的植物修复潜力

在发展中国家，特别是在尼日利亚，任意开垦空地的现象正在增加，甚至在家庭手工业的外围地区也是如此。在尼日利亚Ile-Ife的一个金属回收厂附近种植了两个玉米品种[ART98/SW1(蛋白质)和BR-9928-DMR-SR-Y(非蛋白质)]，以评估这些玉米品种的金属去除潜力。试验在两个地点进行，每个地点按玉米品种进行，并采用随机完全块设计。以玉米秸秆和米莉草为原料生产两种生物炭，每10 t hm -1用作土壤改良剂。两个玉米品种对金属的吸收顺序为:根>茎>粒，其中蛋白质玉米具有较高的生物富集因子:Fe 86.82、Zn 1.19、Cu 4.53、Mn 2.42和Pb 0.15，是包括人在内的动物对金属的吸收途径。结果表明，玉米作物是土壤中金属的生物蓄积者，蛋白质玉米比非蛋白质玉米去除更多的金属。关键词:生物炭;农业废弃物;重金属;玉米;颗粒物;修复

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Ghana journal of agricultural science

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