Nutrient Digestibility and Gas Production of Some Tropical Feeds Used in Ruminant Diets Estimated by the in vivo and in vitro Gas Production Techniques

Abstract

Some feedstuffs which used in ruminants diet (corn grain, soybean meal, wheat bran and alfalfa) were analyzed for chemical composition, apparent in vivo nutrient digestibility, in vitro fermentation gas production and metabolizable energy. Chemical composition of test feeds differed in nutrient contents. Initially apparent in vivo digestibility of alfalfa nutrients were obtained then digestibility of nutrients for the other test feeds were determined by difference method, using 16 Ghezel mature rams (mean weight of 43.9±4 kg). In vivo DM, CP, NDF and OM apparent digestibility were different among the test feeds (p<0.05). Regarding to the results, corn grain had a high DM and OM digestibility between test feeds and soybean meal had a high CP and NDF digestibility between test feeds (p<0.05). Cumulative gas production was recorded at 2,4,8,12,16,24,36, 48, 72 and 96 h of incubation and the equation of p = A (1-e-ct) was used to describe the kinetics of gas production. Potential gas production (A) and rates of gas production (c) differed (p<0.01) among feeds. Corn grain showed higher potential gas production (A) (326.5 mL g −1 DM) and wheat bran had higher rate of gas production (c) (0.097 h −1 ) than the other feeds, inverses alfalfa (257.6 mL g −1 DM) and corn grain (0.048 h −1 ) had lower potential gas production and rate of gas production than the other test feeds, respectively. The metabolizable energy (MJ kg −1 DM) content of feeds was calculated using in vivo organic matter digestibility and gas production data. According to in vivo organic matter digestibility data, the ME values ranged from 9.2 in alfalfa to 13.3 MJ kg −1 DM in corn grain. It was concluded that regarding to different chemical composition of test feeds, the in vivo digestibility, in vitro gas production and ME of feeds showed different values.

Influence of polyethylene glycol on in vitro gas production profiles and microbial protein synthesis of some shrub species

“…Many native browse species have been undervalued because of insufficient knowledge of their feeding value and for their often high content of tannins, which may be detrimental to animal performance (Min et al, 2003). The nutritive value of feeds utilized in ruminant nutrition are commonly estimated by the concentrations of chemical components, and the rates and extents of nutrient digestion (Hamid et al, 2007). The in vitro gas production procedure has become a useful tool to study potential rumen degradation of ruminant feeds (Getachew et al, 2002;Salem et al, 2007).…”

Ensiling on chemical composition and in vitro fermentation in rabbits of different forages

“…It has been widely reported that species with high cell wall and lignin contents showed an increase of lag time (HAMID et al, 2007;CHANG et al, 2007), and a decrease in the rate of gas production (C parameter) and in vitro DMD and OMD (SANDOVAL-CASTRO et al, 2005), which is in accordance with the findings of the present study, in which bean silage showed the highest values of ADL associated with the lowest values of DMD and OMD; also, ryegrass silage showed the lowest lag time associated with its significant lower level (P<0.001) of ADL. CHANG et al (2001) suggested that the current fiber of the diets based on the total NDF content can hardly predict the requirements for dietary fiber in rabbits due to the complex chemical composition of the total dietary fiber and its multiple interactions with the microbial caecal ecosystem.…”

PENGARUH PENAMBAHAN TANIN DAUN NANGKA (Artocarpus heterophyllus) TERHADAP NILAI BIOLOGIS DAUN KELOR (Moringa oleifera) DAN JERAMI KACANG HIJAU (Vigna radiata) SECARA IN VITRO

“…Studi in vitro perlu dilakukan untuk mengevaluasi penggunaan tepung daun nangka untuk meningkatkan efektifitas penggunaan hijauan berupa daun M. oleifera dan jerami V. radiata. Metode in vitro gas test digunakan untuk menguji pakan tunggal dan memiliki korelasi yang tinggi dengan uji in vivo (Menke et al, 1979;Getachew et al, 2000;Hamid et al, 2007). Tujuan dari studi yang dilakukan adalah untuk mengevaluasi penambahan tepung daun nangka terhadap proses fermentasi dan degradasi daun M. oleifera dan jerami V. radiata.…”