The Study on the Application of Hydroquinone in Production of Lambs as Urease Inhibitor

The study was composed of two parts. A one-factor design was adopted to investigate DMD, CPM, NDFD and ADFD of diet by total feces collection method in trial one. Twelve lambs were allotted randomly to 4 groups of 3 animals (replicates), which were fed with basal diet, basic diet plus 40 mg/kg urease inhibitor, urea diet, urea diet plus 40 mg/kg urease inhibitor. Experimental period consisted of a 10-day adjustment period and a 5-day collection period. The experimental results have shown that urease inhibitor did not affected nitrogen balance. But the digestibility of fiber was increased by 20 mg/kg. In trial two twenty weanling crossbreed lambs(Texel×local breed) were allotted to five group of 4 animal (replicates) with an average body weight in all the groups. Each group was fed urea-containing diet (1%, 1.5%, 2% urea of complete ration)+UI, basic diet +UI and basic diet without UI. From the growing trial with administration of 40mg/kg, urease inhibitor, it can be concluded that the urea can replace all soybean meal in the diet in the presence of urease inhibitor. In addition, no significant change occurred to feed intake, average daily gain and feed conversion rate. It is obvious that the economic benefits will be obtained from inclusion of urease inhibitor in urea-containing diet. [Nature and Science, 2004,2(2):20-24]