Farkl oranlarda kaba ve karma yem (80/20, 65/35, 50/50 ve 35/65) içeren
izonitrojenik rasyonlar n, s cakl k stresi alt ndaki koyunlarda ham besin maddelerinin
sindirilebilirli2i, azot dengesi ve baz rumen parametreleri üzerine etkileri bu çal 5mada
incelenmi5tir. Ara5t rma, 4 ba5 erkek Karya toklu ile Latin kare deneme deseninde ve yaz n en
s cak döneminde (17 Haziran-31 A2ustos) yürütülmü5tür. Rasyonlarda karma yem oran
artt kça kuru madde (p<0.01), organik madde (p<0.01), ham protein (p<0.05) ve NDF
(p<0.05) sindirilebilirlik de2erleri ile rumende propiyonik asit oran n n artt 2 (p<0.01), buna
kar5 l k ADF sindirilebilirlik de2erleri (p<0.01) ile asetik asit (p<0.01) ve pH de2erlerinin
(p<0.01) azald 2 belirlenmi5tir. Rumendeki bütirik asit ve NH3-N düzeyleri ise rasyon
farkl l klar ndan etkilenmemi5tir. Rasyondaki karma yem miktar n n artmas yla, elde edilen
azot birikim de2erleri artm 5t r (p<0.01).
In this study, the effects of isonitrogenic rations containing different levels of
roughage to concentrate (80/20, 65/35, 50/50 ve 35/65) on the crude nutrient digestibility,
nitrogen balance and some rumen parameters of sheep under heat stres were investigated. The
study was conducted in Latin-square experimental design the hottest period of the with four
Karya wethers. With the ascending ratios of concentrate; digestibility of dry matter (p<0.01),
organic matter (p<0.01), crude protein (p<0.05), NDF (p<0.05) and, rumen propionic acid
level (p<0.01) were increased, on the contrary ADF digestibility values (p<0.01), acetic acid
levels (p<0.01) and pH (p<0.01) were reduced. Meanwhile, butyric acid and NH3-N levels
were not effected by different levels of rations. As the roughage in rations increases, nitrogen
retention values were also increased (p<0.01)
