To evaluate the availability of organic and inorganic copper and zinc, two experiments were conducted with 24 castrated crossbred pigs in each experiment, covering a body weight range from 71 kg to 81 kg. In both experiments, the animals were randomly allocated to 4 groups with 6 animals each. 10 mg copper and 30 mg zinc were added to the diets in experiment 1. In experiment 2, 20 mg copper and 70 mg zinc were supplemented. Copper and zinc were supplemented in both experiments as inorganic sulfates or as organic copper and zinc produced by chelation of copper and zinc with partially hydrolysed soybean protein in a 2 × 2 factorial arrangement. As the concentration of coeruloplasmin increased in experiment 1 and the concentration of copper in plasma was higher in experiment 2 when organic copper was supplemented, it can be concluded that organic copper has a higher availability as compared to inorganic copper. The addition of organic zinc to the diets increased copper digestibility in both experiments and plasma copper and coeruloplasmin in experiment 2. At 20 mg dietary copper and 70 mg dietary zinc, a higher digestibility of organic zinc could be observed as compared to inorganic zinc. It can therefore be concluded that the depressive effect of zinc on copper availability is lower for organic zinc as compared to inorganic zinc.

Numeriai:

2012 - T.19
Nr.1

2011 - T.18
Nr.1, Nr.2, Nr.3, Nr.4

2010 - T.17
Nr.1-2, Nr.3-4

2009 - T.16
Nr.1-2, Nr.3-4

2008 - T.15
Nr.1, Nr.2, Nr.3, Nr.4

2007 - T.14
Nr.1, Nr.2, Nr.3, Nr.4, Nr.Priedas

2006
Nr.1, Nr.1.Priedas, Nr.2, Nr.3, Nr.4

2005
Nr.1, Nr.2, Nr.3, Nr.4

2004
Nr.1, Nr.2, Nr.3, Nr.4

2003
Nr.1, Nr.2, Nr.3, Nr.4

2002
Nr.1, Nr.2, Nr.3, Nr.4

2001
Nr.1, Nr.2, Nr.3, Nr.4