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Zeolite 의 염기치환용량및 입자도가 Broiler 의 증체 , 사료효율 및 사료영양율이용율에 미치는 영향 .
정천용,이규호,채대웅,한인규 ( Chon Y . Chung,Kyu H . Lee,Dae U . Choi,In K . Han ) 한국축산학회 1978 한국축산학회지 Vol.20 No.6
This experiment was undertaken to investigate the effects of cation exchange capacity(C.E.C) and particle size of zeolite on the body weight gain, feed efficiency and nutrient utilizability when it was used in broiler rations at level of 3%. In this experiment, 9kinds of zeolite were used which have different level of C.E.C(80, 100, 120meq/100g) and different size of particle(20, 50, 90 mesh). The experiment was conducted from Oct. 21 to Dec. 16, 1977. with a total of 400 broer chicks. The results obtained are summarized as follows ; 1. Body weight gain was increased by supplement of zeolite(p$lt;0.05). Especially in the treatment of 120meq/100g in C.E.C and 50 mesh in particle size of zeolite, the body weight gain was superior to those of all other treatments(p$lt;0.05). 2. there was no significant difference in feed efficiency among treatments. However, slightly more feed was required per kg of body weight gain in all treatments constrained zeolite than in control. 3. The utilizabilities of dry matter, crude protein, crude fat and total carbohydrates of finisher diets were improved by addition of zeolite. Particularly in the crude protein utilizability, remarkable improvement was obtained. 4. Moisture content of poultry manure was slightly decreased by the supplement of zeolite at level of 3% in broiler ration. 5. Crude ash contents of zeolite supplemented feeds were higher than those of control diet and standard level of broiler ration officially fixed by ministry of Agriculture and Fishery.
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鄭然厚,鄭天容,鄭仁杰,韓仁圭 서울大學校 農科大學 1976 서울대농학연구지 Vol.1 No.2
To investigate the nutritive value of sweet potato starch pulp silage and corn starch pulp for milk cows, 30 Holstein cows were divided into two groups of strach pulp silages and each fifteen cows were divided into 3 treatments (control, 40% starch pulp silage, 60% starch pulp silage) during three milk periods, which were 20 days respectively. The results obtained were as follows : 1. Contents of moisture, crude protein, DCP, TDN of sweet potato starch pulp silage and cornstarch pulp silage, which were made from raw starch pulp 60%, wh- eat bran 33%, corn gluten meal 7%, lactic acid bacteria, were 51.5, 48.6, 8.13, 9.65, 5.99, 7.73, 41.06, 44. 90%, respectively. 2. As the level of substitution by sweet potato or corn starch pulp silage was increased, milk yields was increased nonsignificantly and butter fat was not si- gnificantly different. 3. Daily feed intake of starch pulp silage, concentrates, green forage was not significantly different among treatments, since the feeds allowances were deter- mined by daily milk yields. 4. Body weight gain of milk cows during experimental periods was a little incr- eased as the level of substitution of starch pulp silage was increased. 5. Cost of concentrates (starch pulp silage included) per kg of milk yields was shown to be profitable as the level of substitution of starch pulp silage was increased. Consequently it could be concluded that sweet potato or corn starch pulp silage can be fed upto 60% without any adverse effects on milk production and may be profitable for milk cows.
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