Value of Zinc Supplementation of Natural Rations for Fattening Beef Cattle

Perry, T. W.; Beeson, W. M.; Smith, William H.; Mohler, M. T.

doi:10.2527/jas1968.2761674x

Cited by 38 publications

(26 citation statements)

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“…In studies with sheep, Suttle and Field (1970) found increased (P < 0.5) Zn excretion when dietary Ca was increased from 1.0 to 2.0%. Perry et al (1968) reported similar observations that by doubling the dietary Ca of beef cattle, hair Zn content was significantly (P < 0.5) decreased. Pond and Wallace (1986) also observed that plasma Zn of ewes fed with high Ca diet was decreased significantly (P < 0.5).…”

Section: Calcium and Phosphorus (Levels And Ratios)supporting

confidence: 62%

Effect of Varying Dietary Levels of Calcium and Phosphorus on Apparent Digestibility and Retention of Macro and Micro-Minerals in Lactating Sahiwal Cows

2020

THE JAPS

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Overfeeding or underfeeding of minerals to the animals may affect health of dairy animals and cost of production. The objective of this study was to investigate the impact of varying dietary levels of Ca and P on apparent digestibility and retention of Ca, P, Mg and Zn. For this purpose, 36 second parity Sahiwal cows at peak lactation stage averaging 70±10 days in milk (DIM) were offered one of six different treatments of varying levels of Ca and P (NCP = Normal Ca and P, HP = 40% higher P, LC = 40% lower Ca, LCHP = 40% lower Ca and 40% higher P, HC =40% higher Ca, or HCHP = 40% higher Ca and P) following a Completely Randomized Design. Dietary Ca and P levels and their ratios did not affect (P>0.05) daily milk yield. Feeding higher than recommended Ca levels (HC, HCLP, HCHP) resulted in a significant decrease (P < 0.05) in apparent Ca digestibility and retention and a significant decrease (P < 0.05) in apparent Zn digestibility. Feeding higher than recommended P resulted in a significant decrease (P < 0.05) in apparent P digestibility, irrespective of dietary Ca levels. Dietary P levels did not (P > 0.05) affect apparent Zn digestibility. A decrease (P < 0.05) in apparent digestibility of Mg was observed in treatment groups HC and HCHP.

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Section: Calcium and Phosphorus (Levels And Ratios)supporting

confidence: 62%

Effect of Varying Dietary Levels of Calcium and Phosphorus on Apparent Digestibility and Retention of Macro and Micro-Minerals in Lactating Sahiwal Cows

2020

THE JAPS

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“…Weight gain response to Zn supplementation in the present study was similar when either soybean meal or cottonseed meal was fed (tables 1 and 2). High levels of inorganic Ca (.5 to 2%) may reduce plasma Zn (Perry et al, 1968) and increase fecal Zn (Suttle and Field, 1970), bu these reports are not consistent with those cite earlier.…”

Section: Discussionmentioning

confidence: 83%

Grazing Cow and Calf Responses to Zinc Supplementation1

Mayland¹,

Rosenau²,

Florence³

1980

Journal of Animal Science

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SummaryThis experiment evaluated weight gain responses to supplemental Zn by cows and calves grazing forage containing Less than 20 ppm Zn. One hundred cow-calf pairs in each of 2 years and 120 pairs in a third year were pastured together over a 63-to 77-day preliminary period during which cows were exposed to bulls. Each experimental period began in mid-June after bulls were removed and continued for 125 to 154 days. During this period, cattle grazed mature dry forage containing <20 ppm Zn and were fed protein supplements with or without added Zn. Estimated Zn intake by each cow-calf pair in the control group ranged from about 140 to 260 mg/pair/day. Daily Zn intake was supplied by forage (100 to 200 mg), basal supplement (32 to 57 mg), water (4 mg), iodized block salt (1 mg) and soil (1 mg). Each cow-calf pair fed the supplement with added Zn received an additional 860 to 900 mg Zn/day. Calves fed Zn gained 6% more (P<.05) weight (.04 kg/day) than did calves in the control group. Weight gains by cows did not differ (P<.05) between the two groups. Clinical signs of Zn deficiency were not observed in any animals. Conception, which occurred before the experimental period, and subsequent calving rates were not affected by Zn supplementation.

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“…However, verified that in diets with and without supplementation of microminerals, Zn was primarily absorbed in the rumen (approximately 43.7% of the Zn intake) and large intestine (an average 27% of the Zn intake), respectively. Moreover, some studies (Mills et al, 1967;Perry et al, 1968) showed that Zn absorption is decreased when Ca is included in the diet. However, reported no differences in Zn absorption independent of dietary Ca.…”

Section: Zincmentioning

confidence: 99%

“…However, reported no differences in Zn absorption independent of dietary Ca. Nevertheless, Prados (2016) (Perry et al, 1968;Pond and Otjen, 1988) that evaluated growth response to Zn supplementation when Zn concentration in the basal diet was unknown. However, Costa e Silva et al (2015a), considered the Zn composition in the basal diet and reported 61 mg/kg DM as the dietary Zn requirements in Nellore cattle.…”

Section: Zincmentioning

confidence: 99%