Effect of organic zinc supplementation on growth, nutrient utilization,and plasma zinc status in lambs

Abstract

Two experiments were conducted to investigate the effect of supplemental zinc (Zn) on performance, nutrient digestibility, and plasma Zn status in Zandi lambs. In experiment 1, 18 male lambs (BW = 21.30 ± 0.55 kg) were fed a basal diet containing 22.8 mg Zn/kg dry matter (DM) with no supplemental Zn (control) or 20 mg of supplemental Zn/kg of DM from Zn sulfate (ZnS) or Zn peptide (ZnP). Average daily gain and dry matter intake were higher for the lambs fed the diet supplemented with ZnP. Feed conversion ratio was significantly (P < 0.05) lower in the ZnP group compared to the control and ZnS groups. In experiment 2, an in vitro gas production technique was used to evaluate the effects of zinc source on the gas production parameters. Rate of gas production after 6 h and total production of gas after 24 and 48 h did not differ between groups. In vitro DM digestibility, short-chain fatty acids, and ME content were increased (P < 0.05) by ZnP supplementation when compared to the ZnS and control groups. The results of this study showed that feeding ZnP improves performance and digestibility of DM and could result in higher metabolizable energy and short-chain fatty acid yield.

Productive Peformance, Nutrients Digestibility and Some Serum Metabolic Indices as Affected by Dieatary Supplementation of Copper and Zinc in Egyptian Buffalo Calves

“…In addition, digestibility of DM, OM, CP and NDF were also reported to be improved with supplemental Zn in dairy goats (Salama et al, 2003). The significant improvement in CP and NDF noticed in the present study on buffalo calves and reported by others in sheep (Mallaki et al, 2015) and goats (Salama et al, 2003), may suggest a positive role for Zn supplementation in fiber digestion. The present results also agree with Garg et al (2008) who found that dietary supplemental Zn at 20 mg/kg of DM improved ADF and cellulose digestibility in lambs.…”

“…These findings are in good agreement with similar observation that supplemental Zn had improved all nutrients digestibility, nutritive values (TDN and DCP) and feed efficiency in buffalo (Zeedan et al, 2009). The results also reinforced by a recent study showed that dietary Zn supplementation at 20 mg of supplemental Zn/kg of DM (Zn sulfate) increased (P < 0.05) digestibility of CP and NDF, with significant improving in ADG as reported in sheep (Mallaki et al, 2015). In addition, digestibility of DM, OM, CP and NDF were also reported to be improved with supplemental Zn in dairy goats (Salama et al, 2003).…”

Effect of Supplementation of Chelated Minerals on Growth Performance of Buffalo Calves

“…Our results are in agreement with previous finding of Mondal et al (2008) who reported the similar pattern of significant (P<0.05) improvement in average daily weight gain in male calves by supplementing chelated minerals in treated group over control. Mallaki et al (2015) also found similar pattern of significant (P<0.05) improvement in average daily weight gain in lambs by supplementing zinc peptide in treated group over control. Gerg et al (2008) also reported supplementation of Zn-methionine in the basal diet (containing 34 mg Zn/kg DM) of the lambs significantly improved their growth rate and digestibility of cellulose and ADF.…”

“…Ashmead et al (2004) recorded that amino acid chelates (AACs) were more bioavailable than inorganic minerals (IOMs). Kinal et al (2007) Mallaki et al (2015) reported that dry matter intake were higher for the lambs fed the diet supplemented with ZnP. Feed conversion ratio was significantly (P < 0.05) higher in the ZnP group compared to the control and ZnS groups.…”

Sheep Methane Emission on Semiarid Native Pasture—Potential Impacts of Either Zinc Sulfate or Propylene Glycol as Mitigation Strategies

“…In a study investigating the effect of ZnSO 4 supplementation in diets containing different levels of protein (6.5 and 8.5% CP, and 8.5% CP + 35 g ZnSO 4 /animal/day) for dairy cows, researchers observed that the possible ruminal protozoa reduction caused by zinc sulfate decreased CH 4 in L/kg DM by 60% [39]. In an experiment evaluating the effects of organic zinc supplementation (ZnSO 4 and Zn-peptides) in sheep, the authors observed that supplementation with Zn-peptides might result in a greater concentration of metabolizable energy and greater production of short-chain fatty acids [42]. Propylene glycol is metabolized in the rumen to lactate and propionate [43], allowing the capture of oxygen and reduction in CH 4 production.…”