PT Journal
AU Travnicek, J
   Kroupova, V
   Soch, M
TI Iodine content in bulk feeds in western and southern bohemia
SO Czech Journal of Animal Science
PY 2004
BP 483
EP 488
VL 49
IS 11
DI 10.17221/4335-CJAS
DE pasture herbage; hay; grass silage; maize silage
AB In 1997-2001 a total of 304 samples of bulk feeds were analysed. Iodine was determined spectrophotometrically by Sandell and Kolthoff's method (Bednar et al., 1964). The highest content of iodine was determined in grass silage (213.3 ± 169.3 ug/kg DM). The lowest concentration was measured in maize silage (110.0 ± 97.2) and hay (112.1 ± 93.9). Pasture herbage contained on average 148.9 ± 105.1. Feeds originating from foothill areas of western Bohemia (geological bedrock built of crystalline schists and igneous intrusions of earlier granite) contained a higher amount of iodine than feeds from foothill areas of southern Bohemia (geological bedrock in which crystalline schists prevail). The largest difference in iodine content in relation to feed origin was found out in hay: western Bohemia 168.0, southern Bohemia 78.0 (P < 0.01). From May to July pasture herbage contained 101.3 ± 73.6 and from August to October 214.5 ± 107.3 ug/kg DM (P < 0.01).
ER