การประเมินอินทรียวัตถุที่ย่อยได้ และพลังงานที่ใช้ประโยชน์ได้ของอาหารผสมสำเร็จที่ใช้ทางใบปาล์มน้ำมันหมักเป็นแหล่งอาหารหยาบ โดยใช้เทคนิคผลผลิตแก๊ส

Abstract

This study aimed to evaluate digestible organic matter and metabolisable energy of the total mixed ration (TMR) containing oil palm frond silage (OPFS) as a source of roughage using in vitro gas production technique. The TMR was formulated according to the ratio between OPFS (roughage) and concentrate as follows: T1 (80:20), T2 (70:30), T3 (60:40) and T4 (50:50). This study was arranged according to a completely randomized design. The rumen mixed microbes inoculums were taken from six Anglo-Nubian 50% crossbred male goats, 4-5 years old with average body weight of 43.07±3.09 kg. As the results, T3 and T4 were significantly higher in soluble gas fraction (a), fermentation of insoluble fraction (b) and potential of extent of gas production (d) values (-7.67, -7.44; 104.46, 106.31and 112.13, 113.74 ml, respectively) than T1 and T2 (-2.34, -2.98; 73.29, 80.42 and 75.88, 83.40 ml, respectively) (P<0.01). It was indicated that T3 had the highest gas production rate (c) (0.07 %/h) when compared with T1, T2 and T4 (0.06, 0.06 and 0.06 %/h, respectively). Furthermore, The TMR showed not significant (P>0.05) digestible organic matter (36.28, 37.85, 37.02 and 37.38% respectively) and metabolisable energy (ME) (1.17, 1.23, 1.22 and 1.20 Mcal/kg DM, respectively)