Korean Journal of Veterinary Research 1981;21(2):117-121.
An Estimation on the Feeding Values of Urea-mixed Zeolite In Vitro
Jae Ku Rhee, Ho Il Lee
Department of Veterinary Medicine, College of Agriculture, Jeonbug National University
In Vitro에 의한 제올라이트·요소합제(尿素合劑)의 사료효율(飼料效率) 판정(判定)
이재구, 이호일
경북대학교 농과대학 수의학과
In order to estimate the efficiency of feed added urea-mixed zeolite the experiment was carried on in vitro. The results obtained were as follows: 1. The pH of all media added urea were inclined toward alkali, except 1% urea (included 99% zeolite) medium. 2. The concentration of ammonia in all media added urea-mixed zeolite was inversely proportional to added volume of zeolite; 1,349, 1,298, 1,255, 1,164 and $786{mu}g/ml$ in 40%, 20%, 10%, 5% and 1% urea media respectively for 30 minutes incubation, and the concentration of ammonia in all media was increased steadily as incubation time proceeded until 9 hours. 3. The efficiency of adsorption of ammonia to zeolite of the feed added 40% urea mixture (dealing in the feed store) was hardly recognized. Accordingly, it is efficient to utilize the feed added 1~5% urea mixture, but it is of no use practica11y because they need much amount of zeolite.

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