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Objective: Chaya (Cnidoscolus aconitifolius) leaf has been found to be an important source of protein,
vitamins, minerals, as well as phytonutrients. The present study aimed to evaluate the effect of Chaya leaf
pellet (CHYP) with various level of protein of concentrate (CP) on rumen fermentation characteristics
and nutrient degradability.
Methods: The dietary treatments were arranged according to a 3 × 5 factorial arrangement in a
Completely randomized design (CRD), consisting of Factor A: three levels of CP of concentrate mixtures
(14, 16 and 18 %CP, respectively) and Factor B: five levels of CHYP supplementation (at 0, 2, 4, 6 and
8% of dry matter substrates).
Results: The in vitro gas technique was used to measure gas kinetics, fraction (a) and fraction (b) were
lower (p<0.05) when increasing CHYP addition. Additionally, the fraction (a + b) were found to yield
interaction (p<0.05) while the fraction (c) was not impacted by CHYP addition. However, in vitro DM
degradability (IVDMD) were enhanced and interactive (p<0.05), using 16 %CP of concentrate with 6 and
8 %CHYP, when compared with 18 %CP in the non-addition. Additionally, the treatment with higher CP
of the concentrate was higher in NH3–N concentration (p<0.001) and by CHYP supplementation group
(p<0.05). Nevertheless, protozoal count in the rumen were remarkably decreased (p<0.05) with
increasing level of CHYP supplementation. Furthermore, rumen C2 concentration was lower (p<0.05) in
the treatments with CHYP supplementation, while C3 was significantly increased and interactive (p<0.05)
between levels of CP and CHYP supplementation especially at 8 %CHYP supplementation.
Conclusion: Based on this study, the results revealed novelty of using CHYP as a promising supplement
to enhance rumen fermentation and to mitigate methane production. However, in vivo feeding
experiments should be subsequently conducted to elucidate the effect of CHYP on rumen fermentation,
as well as ruminant production.
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