Research Information System
KSU TARIM VE DOGA DERGISI-KSU JOURNAL OF AGRICULTURE AND NATURE, no.3, pp.623-628, 2022 (ESCI)
The current experiment was conducted to determine the effect of rosemary extract on in vitro methane production, tru digestibility, partitioning factor, microbial protein and efficiency of microbial protein production of alfalfa hay. Rosemary extract significantly (P<0.001) affected the in vitro gas production, methane production, true digestibility, partitioning factor, microbial protein and efficiency of microbial protein of alfalfa hay (P<0.001). The gas production ranged from 92.80 ml to 109.16 ml/500 mg dry matter. The gas production significantly increased with supplementation of rosemary extract except for that of supplemented with dry rosemary extract obtained by drying and that of in August, (P<0.001). The highest gas production was obtained in group that supplemented with fresh rosemary extract obtained in September. Rosemary extract significantly increased the methane production in both ml or %. The methane production in both ml and % ranged from 14.66 to 25.36 ml and %15.76 to 25.36. respectively. Rosemary extract- signs want y decreased true digestibility of alfalfa hay. The true digestibility ranged from %67.07 to 72.50. Supplementation of rosemary extract significantly decreased microbial protein production and efficiency of microbial protein production. Microbial protein ranged from 85.56 to 140.20 mg. The lowest microbial protein production and efficiency of microbial protein production were obtained in group of supplemented with fresh rosemary extract, obtained in September. As a conclusion, rosemary extract is suggested to use in ruminant diets to manipulate the ruminal fermentation due to negative effect on microbial production, digestibility and methane production.