Growth-Promoting Efficacy of Tetrabasic Zinc Chloride and Two Sources of Zinc Oxide for Newly Weaned Pigs

نویسندگان

  • David H. Baker
  • Ioannis Mavromichalis
  • Douglas M. Webel
چکیده

Pharmacologic levels of supplemental Zn are well established as growth promoters for newly weaned pigs. Feed-grade zinc oxide (ZnO) manufactured by the Waelz process dominates the feed-grade Zn market for pigs, and this source of ZnO also has been most heavily researched as a growth promotant for nursery pigs (Hahn and Baker, 1993; Hill et al., 1999; Mahan et al., 2000; Mavromichalis et al., 2000). Our research with chicks has demonstrated that Waelz ZnO (72% Zn) has a relative Zn bioavailability (RBV) of around 43% relative to analytical-grade ZnO (80.3% Zn). Another source of feed-grade ZnO is manufactured by the hydrosulfide process and contains about 78% Zn. Our research has shown that the RBV of Zn in this product is somewhat higher than that in analytical-grade ZnO (Edwards and Baker, 1999).

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تاریخ انتشار 2001