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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 73, No. 3, 2013, pp. 282-287
Bioline Code: cj13040
Full paper language: English
Document type: Research Article
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 73, No. 3, 2013, pp. 282-287

 en Heavy metals in cowpea ( Vigna unguiculata check for this species in other resources L.) after tannery sludge compost amendment
Marcal Silva, Maria Doroteia; Ferreira Araújo, Ademir Sérgio; Pinheiro Leal Nunes, Luis Alfredo; de Melo, Wanderley José & Pratap Singh, Rajeev

Abstract

Repeated soil amendment with industrial waste can affect the accumulation of chemical elements, mainly heavy metals, in plants. We therefore evaluated the accumulation of Cr, Cd, Ni, and Pb in cowpea ( Vigna unguiculata check for this species in other resources [L.] Walp.) shoots and grains in soil amended for three consecutive years with tannery sludge compost (TSC). Tannery sludge compost was applied annually starting in 2009 at 0, 2.5, 5, 10, and 20 t ha-1 and cowpea was sown. At 40 and 60 d after cowpea sowing, the accumulation of Cr, Cd, Pb, and Ni was evaluated in the shoots and grains, respectively. The experiment used completely randomized design with four replicates and data were subjected to ANOVA and F-test (5%). Only Cr accumulation was significant (P < 0.05) in the cowpea shoots after 3 yr of TSC amendment; accumulation increased as TSC rates were applied. However, there was no significant Cr, Cd, Ni, and Pb accumulation in grains. After 3 yr of consecutive TSC soil amendments, Cr accumulated in the shoots, but it was not translocated to the grains.

Keywords
Organic residues; trace elements; Vigna unguiculata

 
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