Influence of dietary zinc concentration and supplemental zinc source on nutrient digestibility, zinc absorption, and retention in sheep1

Abstract

The objective of this study was to assess whether supplemental Zn source or concentration would affect ruminant Zn retention and nutrient digestibility. Thirty-six weaned crossbred Polypay wethers, were sorted by BW to 3 periods and stagger started on a common diet (22 mg Zn/kg DM) for a 52-d depletion period. Day 52 BW was used to assign Zn treatments (3 lambs/treatment/ period): no supplemental Zn (CON), or supplemental Zn (40 mg Zn/d) from Zn sulfate (ING; Zinc Nacional, Monterrey, SA, Mexico), Zn methionine (ORG; Zinpro 120; Zinpro, Eden Prairie, MN), or Zn hydroxychloride (HYD; IntelliBond Z; Micronutrients USA LLC, Indianapolis, IN). On day 53 (day 1 of Zn treatments), lambs were moved to metabolism crates for 10 d of adaptation and 5 d of total fecal and urine collection. Blood for plasma Zn analysis was collected on day 52 and day 68. Data were analyzed as a randomized complete design with fixed effects of treatment, period and the interaction, which was significant (P ≥ 0.19) for day 68 plasma Zn but was removed for all other variables. Contrast statements were used to separate treatment means: CON vs. ZINC (ING, ORG, HYD), ING vs. HYD, and ORG vs. HYD. Day 52 plasma Zn concentrations were similar when CON was compared with ZINC (P = 0.84),

The Effect of Zinc and/or Herbal Nutraceuticals on Rumen Fermentation, Microbiota and Histopathology in Lambs

“…Herbal diets can in uence the rumen microbiome, the kinetics of fermentation and the response and adaptation to anti-methanogenic compounds and diets that lead sometimes to the inconsistent e cacy of phytochemical substances [45]. Zn is also involved in a wide assortment of physiological processes; therefore, nutrient digestibility may be affected by supplemental Zn, which is incorporated into enzymes throughout the body and is critical for most metabolic processes in ruminants [46]. It is known that zinc in the nutrition of ruminants can signi cantly in uence ruminal fermentation [47,48].…”

“…Despite the fact that zinc retention in lambs can be similar regardless of the source of Zn or its concentration [46], the bene cial effect of zinc (i.e., antioxidant, anti-in ammatory or antiapoptotic, respectively) strongly depends on both of these factors, and too much or too little zinc in diets can lead to the opposite effect [50,51].…”

The influence of supplemental zinc and dietary fiber concentration on mineral retention of beef steers1

“…In addition, Carmichael et al (2018) found that increasing supplemental Zn concentrations positively impacted N retention in finishing beef steers that receive a low-fiber diet (~19% NDF). Recently, some have determined that feeding supplemental trace minerals may influence fiber digestibility ( Faulkner et al, 2017 ; Faulkner and Weiss, 2017 ; VanValin et al, 2018 ). Regardless, few studies have been conducted evaluating the relationship of fiber and Zn supplementation exceeding current recommendations ( NASEM, 2016 ).…”

Effect of an Incremental Exercise to Exhaustion on Plasma Concentrations of Iron and Zinc in Athletes and Nonathletes

“…Trace elements support critical functions in the body to secure the normal metabolism and homeostasis. Previously published studies on the effect of exercise are not consistent on the trace elements which deficiencies and excesses in any of them can result in the appearance of some disorders (42)(43)(44). Additionally, the blood changes in trace elements have been detected to have a role as indices of serious mood disorders such as depression in adolescents (45).…”

“…A number of authors have considered the effects of exercise on the Zn status in athletes (4, 10, 30,42,55). The early concern between exercise and Zn status was caused due to a report of a drop in the Zn blood levels in athletes as compared with nonathletes (56).…”