Effect Of ZAD As Biological Additive On The Performance Of Small Ruminants Fed Rations Based On Agricultural By-Products

H.M. Gado; A.M. Gad; H .M . Metwally;

Abstract


The cost of industrial enzymes are very high, One Of this enzymes is the industrial cellulase. The represent study is an attempt to produce an idustrial compound from anaerobic bacteria in the rumen to introduce cellulase function. The effect of this compound which termed as ZAD was investigated as a nutritional additive when added to each of two materials of agricultural by products representing crude fiber sources (corn straw and bagasse) in the rations of ruminants. This study was divided into four experimental trails. The first trail was ensiling to fiber sources (corn straw and bagasse). Percentage of CP in treated ensiled fiber sources increased (P<0.05) and CF%. ADF% decreased. In the second trail, IN Vitro DM and OM disappearances were carried out by incorporating the obtained silage in eight diet formulas containing the same DCP and TDN with two sources of readily available CHO (corn grain and potatoes roots). The treatments with ZAD increased IVDMD and IVOMD (P<0.05). In the third trail a metabolic trial was carried out in which 40 male goats averaged 23 kg were divided randomly and equally into eight experimental groups fed the previous indicated eight diets based on maintenance allowances of NRC (1975). Digestibility coefficients were improved and concentration of plasma protein and urea in treated groups increased (p< 0.05). Also, values of pH, (NH3-N) and TVF'S in the rumen of treated groups increased. In the fourth trial, a feeding trial was carried out for six months in which (56) Male Baladi lambs averaged about 20 kg in the beginning of the experiment were used and divided into the same eight groups. Results indicated that feed intake, growth rate and feed efficiency improved with treated animals (P<0.05). It was concluded that the ZAD treatment improved digestibility and palatability of fiber sources which resulted in improving animal performance and feed efficiency. It appears fr.om the previous results, ensiling process and adding suitable source of readily available CHO in the ration of ruminants play an important role with the ZAD addition in obtaining such positive results.
Key words: Biological treatment, ZAD compound, Bagasse, Corn straw, Corn grain, Potato roots, Palatability and small ruminants.


Other data

Title Effect Of ZAD As Biological Additive On The Performance Of Small Ruminants Fed Rations Based On Agricultural By-Products
Authors H.M. Gado ; A.M. Gad ; H .M . Metwally 
Keywords Biological treatment;ZAD compound;ZAD;ZADO;Bagasse;Corn straw;Corn grain;Potato roots;Palatability;small ruminants
Issue Date 2005
Publisher Research Bulletin, Ain-Shams Univ.,2005
Journal Research Bulletin, Ain-Shams Univ.,2005 

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