Absorption and distribution of selenium in animals consuming canola grown for selenium phytoremediation

La Absorción y Distribución del Selenio en Animales Consumiendo Canola Cultivada para la fitoremediacion del Selenio

Bañuelos, G.S. and Mayland, H.F. (2000) Absorption and distribution of selenium in animals consuming canola grown for selenium phytoremediation. Ecotoxicology and Environmental Safety. 46:322-328.

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Abstract

Canola (Brassica napus) grown as a selected plant species for
field phytoremediation of selenium (Se) may be harvested and
utilized as Se-enriched forage for marginally Se-deficient lambs
and cows. Two field studies were conducted under controlled
conditions to evaluate the accumulation of Se into different
animal tissues, including blood, excreta, and milk. In Study 1,
treatments consisted of feeding lambs freshly cut Se-enriched
canola (containing ≈ 4 mg Se kg-1 DM) or control canola (containing
<0.1 mg Se kg-1 DM), respectively, for 64 days. In
Study 2, treatments consisted of feeding cows dried Se-enriched
canola (containing ≈ 3.5 mg Se kg-1 DM) as part of their daily
ration for 20 days. In Study 1 at postmortem, Se concentrations
were significantly greater in all tested tissues and in excreta from
lambs fed Se-enriched canola. In Study 2, Se values were slightly
higher in blood and excreta, but not significantly higher in milk
from cows sampled throughout the study. Significant differences
in total live animal weight were not observed between treatments
in either study. Based on these results, canola plants (not including
seeds) used for field phytoremediation of Se may be harvested
and safely fed to lambs and cows to help meet normal Se intake
requirements.

Item Type:	Article
NWISRL Publication Number:	1018
Subjects:	Animal > Animal health Mass Import - autoclassified (may be erroneous)
Depositing User:	Dan Stieneke
Date Deposited:	20 Nov 2010 21:50
Last Modified:	15 Nov 2016 15:32
Item ID:	106
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/106