Selenium fertilizers for pastures grazed by sheep. 2. Wool and liveweight responses to selenium

Whelan, BR; Barrow, N. J.; Peter, DW

doi:10.1071/ar9940877

Cited by 25 publications

(12 citation statements)

References 9 publications

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“…If Se deficiency occur in grazing and forage feed, it should be supplemented for ruminant ration. Selenium supplements could increase live weight gains, wool production and growth rate (Gabbedy,1971;Whelan et al, 1994;and Mahima et al, 2006). Selenium (Se), in the form of selenocysteine, is the central structural component of a number of specific enzymes, and especially catalase, glutathione peroxidase, which allows the host defense against oxidative stress.…”

Section: Introductionmentioning

confidence: 99%

Influence of Some Trace Minerals in Form of Nano Particles as Feed Additives on Lambs Performance.

Mohamed

Abd-ElGhany

et al. 2015

Journal of Animal and Poultry Production

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This study was carried out to investigate the effect of large particles (zinc Zn or selenium SE) or nano-Zn and nano-Se particles as feed supplement in lambs rations on feed intake, degradability, growth performance and some blood parameters. Twenty five growing lambs aging about 5-6 months with average body weight of 24.5kg, were used. Lambs were divided into five similar groups and fed randomly on one of the following rations. The first group received the basal ration, composed of concentrate feed mixture (CFM) to cover 50% of protein and energy allowances recommended by NRC (1989) and clover hay (CH) without feed additives which served as the control group (R1). The other tested groups were randomly fed the control ration supplemented with 10 mg large particles zinc (L-Zn), 0.04 mg large particles selenium (L-Se), 5 mg nano particles zinc (N-Zn) and 0.02 mg nano particles selenium (N-Se) / kg CFM for rations R2,R3, R4 and R5, respectively. Two canulated sheep were used to measure in sacco disappearance of DM, OM and CP of tested rations. Results showed that N-Zn & N-Se particles groups improved DM, OM and CP degradability compared with control group. But there were no significant differences among large particles groups and control group. Ration contained N-Zn had a significant effect on DM intake, but there were no significant differences among the large particles zinc (L-Zn) or selenium (L-Se) groups and control group among DMI. On the meantime, results showed that R4 & R5 groups increased (P<0.05) average daily gain and total weight gain compared to the control group. Also, feed conversation as DMI/ kg gain for R4 & R5 groups were improved by 16.93 and 18.25%, as compared with control group. Feed cost /kg gain was decreased for R4 and R5 groups as compared with control group. Serum total protein and albumin for R4 was increased compared with control group. While no significant differences between control group and other groups were found among AST and ALT values. In conclusion, large size particles of Zn or Se could be replaced with smaller amount of nano particles Zn or Se without any side effects on the animal performance.

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Section: Introductionmentioning

confidence: 99%

Influence of Some Trace Minerals in Form of Nano Particles as Feed Additives on Lambs Performance.

Mohamed

Abd-ElGhany

et al. 2015

Journal of Animal and Poultry Production

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“…The potential for using Se-containing fertilizers to increase forage Se concentrations and, thus, dietary Se intake has been demonstrated in Finland, New Zealand, and Australia where it has proven to be both effective and safe [10]–[14]. The predominant chemical form of Se in Se-fortified grains and hays is SeMet [7].…”

Section: Introductionmentioning

confidence: 99%

Effect of Feeding Selenium-Fertilized Alfalfa Hay on Performance of Weaned Beef Calves

et al. 2013

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Selenium (Se) is an essential micronutrient in cattle, and Se-deficiency can affect morbidity and mortality. Calves may have greater Se requirements during periods of stress, such as during the transitional period between weaning and movement to a feedlot. Previously, we showed that feeding Se-fertilized forage increases whole-blood (WB) Se concentrations in mature beef cows. Our current objective was to test whether feeding Se-fertilized forage increases WB-Se concentrations and performance in weaned beef calves. Recently weaned beef calves (n = 60) were blocked by body weight, randomly assigned to 4 groups, and fed an alfalfa hay based diet for 7 wk, which was harvested from fields fertilized with sodium-selenate at a rate of 0, 22.5, 45.0, or 89.9 g Se/ha. Blood samples were collected weekly and analyzed for WB-Se concentrations. Body weight and health status of calves were monitored during the 7-wk feeding trial. Increasing application rates of Se fertilizer resulted in increased alfalfa hay Se content for that cutting of alfalfa (0.07, 0.95, 1.55, 3.26 mg Se/kg dry matter for Se application rates of 0, 22.5, 45.0, or 89.9 g Se/ha, respectively). Feeding Se-fertilized alfalfa hay during the 7-wk preconditioning period increased WB-Se concentrations (P Linear<0.001) and body weights (P Linear = 0.002) depending upon the Se-application rate. Based upon our results we suggest that soil-Se fertilization is a potential management tool to improve Se-status and performance in weaned calves in areas with low soil-Se concentrations.

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“…Selenium content in soil and pasture on investigation locations during a three year period DM -dry matter; * according toMayland et al (1989); ** according toWhelan et al (1994a) …”

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Concentration of selenium in soil, pasture, blood and wool of sheep

Antunović¹,

Vegara²,

Šperanda³

et al. 2010

Acta vet. (Beogr.)

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Investigations have been conducted on Slavonia during a three year period on six locations, two per each year during June (in the first year = Vinkovci and Beli Manastir; in the second year = Valpovo and Djakovo; in the third year Slatina and Donji Miholjac). Six samples from the soil, pasture and sheep wool, as well as 15 sheep blood samples were taken from each locality. There was a deficit of selenium content in the soil on four locations in the second and third year (0.18; 0.14; 0.10 and 0.07 mg/kg) and an adequate content on locations Vinkovci and Beli Manastir in the first year (0.98 and 0.71 mg/kg). The locality Valpovo was characterized by the highest selenium concentration in pasture, blood and wool of sheep, as well as by the lowest blood enzymes activities (ALT, AST, CK, LDH) when compared to other locations. Selenium concentration in pasture was under the critical range on all locations (from 0.006 to 0.03 mg/kg DM), except the locality Valpovo in the second year (0.05 mg/kg DM). Serum selenium concentrations (from 0.035 to 0.082 mg/L) on all locations were below the adequate range for adult sheep and differed among locations. Activities of enzymes in the blood of sheep (AST: 3.59, CK: 4.93 and LDH: 6.87 μkat/L) showed severe selenium deficiency. Selenium concentrations in the wool were under the critical level on all locations (from <0.0002 to 0.06 mg/kg). The results regarding selenium in wool showed that, apart from blood selenium and activities of plasma enzymes (AST, CK, LDH), wool should also be taken in account as a selenium status indicator

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Selenium fertilizers for pastures grazed by sheep. 2. Wool and liveweight responses to selenium

Cited by 25 publications

References 9 publications

Influence of Some Trace Minerals in Form of Nano Particles as Feed Additives on Lambs Performance.

Influence of Some Trace Minerals in Form of Nano Particles as Feed Additives on Lambs Performance.

Effect of Feeding Selenium-Fertilized Alfalfa Hay on Performance of Weaned Beef Calves

Concentration of selenium in soil, pasture, blood and wool of sheep

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