Effect of Co, Cu, Fe, Mn, Mo, Se, and Zn supplementation on the elemental content of soft tissues and bone in sheep grazing ryegrass/white clover pasture

Abstract

, and Mn (l05-455) on the concentrations of major and minor elements in some organs, soft tissues, and bones of 72 Romney wethers were measured. The treatment and two control groups were each made up of six sheep. Trace elements were administered daily for 84 days and the sheep grazed as one group on ryegrass/white clover pasture. The animals were then shorn and slaughtered, and some organs, tissue, and bones removed for elemental analyses. A 40% increase in liver Cu occurred when Cu intakes were increased. The Se contents of the liver, kidney, and plasma were increased by over 200% and wool by 23% with increased Se intake. Similarly, increased Mn intakes increased the Mn contents of the liver, kidney, spleen, brain, and pancreas by over 25% and the gut by 260%, and increased Fe intakes increased the Fe contents of the lungs, spleen, and gut by 30, 57, and 76% respectively. Iron also decreased the Cu contents in the carcass (27%) and, markedly, in the liver (45%). Bone mineral concentrations were influenced by increasing the intakes of Se, Mo, and Cu. The Mo and Se contents of the scapula, humerus, ulna/radius, and rib were increased by over 220 and 35% respectively with increased Mo and Se intakes, and the Ca, P, Mg and Na concentrations of the bone were elevated 16--23, 17-34, 19-27, and 8-18% respectively depending on the particular bone when supplementary Cu was given.

Amounts and distribution of mineral elements associated with liveweight gains of grazing red deer(Cervus elaphus)

“…in sheep it was observed that a two-to three-fold increase in the ca, P, Mg, Na, K, cu, Mn, Fe and Zn intakes had no effect on their muscle and bone mineral concentrations. However, increased cu, Mn and Fe intakes did increase liver cu, digestive tract, bone and spleen Mn, and digestive tract Fe concentrations, respectively in sheep (Grace & Lee 1980. Thus it is most likely that in deer, the mineral content associated with liveweight gain, largely muscle and bone, is not influenced by varying mineral intakes.…”

“…Likewise, supplementation of deer, cattle and sheep with cu leads to a marked increase in liver cu concentrations (Grace et al 2004). it was found in sheep that there was little or no change in the cu concentrations of tissues other than liver following cu supplementation (Grace & Lee 1980).…”

“…Thus it is most likely that in deer, the mineral content associated with liveweight gain, largely muscle and bone, is not influenced by varying mineral intakes. A likely exception would be Se, which was not determined in this study, because it is stored as selenoamino acids and a three-fold increase in Se intake has been observed to markedly increase the Se concentrations in bone, muscle and many organs in sheep (Grace & Lee 1980 While bone contains most of the ca in the body, it also contains a large proportion of the P, Mg and Na, as well as smaller amounts of cu, Zn, Mn, and Fe. However, while ca and P can be readily mobilised from bone to maintain blood ca and P concentrations, the skeleton was observed not to be an effective storage tissue to maintain blood trace element concentrations (Grace & Lee 1983).…”

An exploratory analysis of the suitability of diets fed to a flightless insectivore, the North Island brown kiwi (Apteryx mantelli), in New Zealand

“…Minerals were determined in a single analysis by inductively coupled argon plasma atomic emission spectrometry [Lee, 1983;Grace and Lee, 1990]. …”

Nutrient composition of the crop contents of growing and adult grey‐faced petrels (Pterodroma macroptera):A preliminary investigation

“…Calcium, phosphorus, potassium, sodium, sulphur, iron, magnesium, zinc, copper, manganese, and selenium were determined in the lipid extracted samples in single analysis by inductively coupled argon plasma atomic emission spectrometry (Lee 1983;Grace & Lee 1990).…”