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Rumen pH and Ammonia Nitrogen of Cattle Fed Different Levels of Oil Palm (Elaeis guineensis) Frond Based Diet and Dry Matter Degradation of Fractions of Oil Palm Frond

  • Islam, M. ;
  • Dahlan, I. ;
  • Rajion, M.A. ;
  • Jelan, Z.A.
  • Received : 1999.08.14
  • Accepted : 1999.12.21
  • Published : 2000.07.01

Abstract

Three fistulated Malaysian local bulls were used in a $3{\times}3$ Latin square design to determine the effects of different levels of concentrate with oil palm (Elaeis guineensis Jacq.) frond (OPF) on rumen pH and $NH_3$-N concentration, and DM degradability of different fractions of OPF. Three diets namely, 60% OPF pellet and 40% concentrate (Diet 1), 50% OPF pellet and 50% concentrate (Diet 2) and 40% OPF pellets and 60% concentrate (Diet 3) were used. The levels of concentrate in the diets affected rumen pH and $NH_3$-N concentration. The pH and $NH_3$-N concentration almost in all hourly samples did not show any difference (p>0.05) among the diets except the 6 h and 9 h samples. The highest (p<0.01) $NH_3$-N concentration was obtained on Diet 3 followed by Diet 2 and Diet 1, but there was a slightly higher (p>0.05) pH on Diet 1. The $NH_3$-N concentrations of rumen liquor at 9 h sampling on Diet 1 and Diet 2 were below the critical level (50 mg/liter) required for efficient fermentation of fibrous feeds. The in sacco DM degradation of different fractions of OPF was affected by diets. The DM degradation of fractions of OPF was higher on Diet 3, which showed differences (p<0.01) with the other diets. It was found that a higher level of concentrate (60%) with OPF gave a higher rumen $NH_3$-N concentration that increased the DM degradation of OPF fractions. The results showed that OPF could support an efficient rumen function in terms of $NH_3$-N concentration and pH when ${\leq}50%$ in the diet. A higher level of OPF (>50%) does not support an efficient rumen fermentation in terms of $NH_3$-N concentration, and resulted in lower DM degradation values of the fractions. The results suggested that there is a need to supplement additional nitrogen to OPF based diets.

Keywords

Oil Palm Frond;Rumen pH;Rumen $NH_3$-N Concentration;In Sacco Degradability

Cited by

  1. Jacq.) fronds on fatty acid profiles of goat muscles vol.96, pp.6, 2011, https://doi.org/10.1111/j.1439-0396.2011.01206.x
  2. Effect of Feeding Palm Oil By-Products Based Diets on Muscle Fatty Acid Composition in Goats vol.10, pp.3, 2015, https://doi.org/10.1371/journal.pone.0119756
  3. Effects of forage ensiling and ration fermentation on total mixed ration pH, ruminal fermentation and performance of growing Holstein-Zebu cross steers vol.88, pp.9, 2017, https://doi.org/10.1111/asj.12797

Acknowledgement

Supported by : Intensification of Research in Priority Areas(IRPA)