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 ㎍/㎖ in 40%, 207, 107, 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 400 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.
|