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Advances in Animal and Veterinary Sciences

Research Article
Adv. Anim. Vet. Sci. 7(4): 272-279
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Min Aung, Soe Min Thein, Naw Chueslis Phaw, Than Htike Phyo, Yan Paing Phyo, Naing Ye Phyo, Lesley Van Bik, Aung Bo Bo, Hset Maw, Aung Myint Maw, Say Yu Maw, Phyo Pa Pa Moe, Dezin Soe Lwin, Khin Sandar Myint, Yin Yin Kyawt, Khin San Mu*

Department of Animal Nutrition, University of Veterinary, Yezin, Nay Pyi Taw, 15013, Myanmar.

Abstract | This experiment was conducted to evaluate the in vitro fermentation parameters of grass based diet supplemented with two different tree legume forages in ruminants. The grass [Mulato II (M)] was mixed with legume forages [Gliricidia(G) and Sesbaenia (S)] to obtain the feed mixtures, M70%+G30%, M70%+S30% and M70%+G15%+S15%, and then carried out the in vitro gas production. The lower (p<0.05) crude protein and higher (p<0.05) fibre (neutral detergent fibre and acid detergent fibre) contents were observed in Mulato II compared with legume forages, and M70+G30 had the highest (p<0.05) fibre content among the feed mixtures. The significant differences (p<0.05) in gas productions were observed in early incubation times (1, 6 and 12h). The higher fermentation parameters were found in Gliricidia. For the feed mixtures, no significant differences (p>0.05) in gas production and fermentation kinetics were observed. The nutritive values such as metabolizable energy, organic matter digestibility, short chain fatty acid, total digestible nutrient and digestible dry matter were higher (p<0.05) in Sesbaenia than other feedstuffs. The dry matter intake of M70+S30 was significantly higher (p<0.05) than that of M70+G30 and M70+G15+S15. However, all feedstuffs and feed mixtures possessed the nutritive values of high quality forages and complete feeds for ruminants. The highest (p<0.05) methane concentration was observed in Sesbaenia, followed by Gliricidia and Mulato II. For the feed mixtures, M70+G15+S15 showed the higher (p<0.05) methane gas concentration than M70+G30 and M70+S30. The negative correlation (R2=0.9252) between NDF content and methane gas concentration of feedstuffs was observed. Thus, grass and legume forage mixtures have potential to use as complete feed for ruminant without using concentrates because of their higher nutritive values. In consideration with environmental issue, M70+G15+S15 feed mixture should not be used as ruminant feed because of its higher concentration of methane.

Keywords | Grass, Legume, In vitro gas production, Nutritive values, Methane