scholarly journals Nutritional evaluation of treated canola straw for ruminants using in vitro gas production technique

2011 ◽  
Vol 10 (66) ◽  
pp. 14218-14221
Author(s):  
Khodaparast Bakhshali ◽  
Salamat Doust Nobar Ramin ◽  
Maheri Sis Naser ◽  
Salamat Azar Mohammad ◽  
Taher Maddah Mohammad
Keyword(s):  
Gas Production ◽  
Production Technique ◽  
Nutritional Evaluation ◽  
In Vitro Gas Production ◽  
Canola Straw

Nutritional Evaluation of non Forage High Fibrous Tropical Feeds for Ruminant Using in vitro Gas Production Technique

2005 ◽  
Vol 4 (5) ◽  
pp. 298-303 ◽  
Author(s):  
Songsak Chumpawadee . ◽  
Kritapon Sommart . ◽  
Thevin Vongpralub . ◽  
Virote Pattarajinda .
Keyword(s):  
Gas Production ◽  
Production Technique ◽  
Nutritional Evaluation ◽  
In Vitro Gas Production

Estimation of fermentable energy by the automatic in vitro gas production technique for a selection of feedstuffs incubated alone and in combination

1998 ◽  
Vol 1998 ◽  
pp. 69-69
Author(s):  
S. Fakhri ◽  
A. R. Moss ◽  
D.I. Givens ◽  
E. Owen
Keyword(s):  
Organic Matter ◽  
Incubation Period ◽  
Gas Production ◽  
Production Technique ◽  
In Vitro Gas Production ◽  
Fe Content ◽  
The Individual ◽  
Gas Volume ◽  
Selection Of

The gas production (GP) technique has previously been used to estimate the gas volume (fermentable energy (FE)) of compound feed ingredients for ruminants (Newbold et al., 1996). It was shown that the FE content of feed mixtures was represented by the combination of the total gas from the incubation of the individual feeds. However this additivity might not be consistent throughout the incubation period. The objectives were to test whether 1. other GP parameters give better estimates of FE for simple mixtures and are they additive; 2. whether organic matter apparently degraded in the rumen (OMADR) explain differences in GP; and 3. to find out if there are any other better measures than OMADR for estimating FE.

scholarly journals The nutritional evaluation of forage-based mixed rations in New Zealand using an in vitro gas production technique. 1: analytical survey

2021 ◽  
pp. 1-6
Author(s):  
N.D. Meads ◽  
R. Tahmasbi ◽  
N. Jantasila
Keyword(s):  
Dry Matter ◽  
Volatile Fatty Acids ◽  
Environmental Science ◽  
Ghg Emissions ◽  
Negative Relationship ◽  
Real Data ◽  
Gas Production ◽  
Production Technique ◽  
In Vitro Gas Production

Greenhouse gas (GHG) emissions from livestock are an important consideration in environmental science. Estimating GHG production can be problematic at a farm or animal level, and requires controlled conditions to produce real data. An in vitro gas production technique (IVGPT) was developed to evaluate forage-based total mixed rations in digestion kinetics and GHG production. Two hundred and sixty samples of complete mixed rations (MR), which included a pasture component used in commercial lactating dairy herds, were collected around NZ across three calendar years, 2017-2019. Twenty of the 260 samples were 100% total mixed rations (TMR) with no pasture content. The samples were submitted for proximate analysis as well as IVGPT to generate GHG production figures. The results showed an average total gas production (TGP) of 129.82 ml/g dry matter (DM), 78.6% true digestibility (TDMD), 125.06 mg/g DM microbial biomass (MB), 20.16 g CH4/kg DM, and 12.8 MJME/kg DM. The average nutrient composition was dry matter (DM) 31.55%, crude protein (CP) 21.85%, neutral detergent fibre (NDF) 44.35%, and starch 7.03%. The IVGPT CH4 production was negatively correlated to NDF (r=-0.312), ADF (r=-0.193), TGP (r=-0.216), and was positively correlated with TDMD (r=0.250), apparent digestibility (ADMD) (r=0.614), starch (r=0.117) and volatile fatty acids (r=0.538). The MR diet showed a strong positive relationship with ADMD digestibility (P=0.01) and a negative relationship with fibre content (NDF, P=0.01 and ADF, P=0.01). However, CH4 production reduced linearly with increasing TGP (P=0.01). The results indicated that a greater CH4 production may be related to higher digestibility of mixed ration.

Evaluation of nutritional value in some tropical by-products using the in vitro gas production technique

2009 ◽  
Vol 2009 ◽  
pp. 190-190
Author(s):  
A Taghizadeh ◽  
M Besharati
Keyword(s):  
Rumen Fluid ◽  
Short Chain Fatty Acids ◽  
Gas Production ◽  
Production Technique ◽  
Production Methods ◽  
Feeding Programs ◽  
Body Of Knowledge ◽  
In Vitro Gas Production ◽  
Digestion Kinetics

Anaerobic digestion of carbohydrates by ruminal microbes produces short chain fatty acids (SCFA), CO2, CH4, and traces of H2; hence, measurement of gas production in vitro can be used to study the rate and extent of digestion of feedstuffs (Hungate, 1966). When a feedstuff is incubated with buffered rumen fluid in vitro, the carbohydrates are fermented to SCFA, gases mainly CO2 and CH4 and microbial cells. Gas production is basically the result of fermentation of carbohydrates to acetate, propionate and butyrate (Wolin, 1960; Beuvink and Spoelstra, 1992; Blummel and Ørskov, 1993). High correlations between gas production and NDF disappearance, r2 = 0.99 (Pell and Schofield, 1993) or gas production and DM disappearance, r2 = 0.95 (Prasad et al., 1994) have been reported. In vitro techniques that estimate digestion kinetics indirectly by measuring gas production are a more viable option than other in vitro methods. Gas production technology allows for a more usable collection of digestion kinetics data and has allowed for a growing body of knowledge that is directly applicable to the feeding programs that are in daily practical field use. The range of data that can be acquired is broad and will no doubt grow over time. One of the most challenging problems associated with using gas production methods is that the amount of gas produced varies with different molar proportions of SCFA. For example, a higher propionate concentration is associated with lower gas production because an extra carbon atom in propionate would otherwise have appeared as CO2 (Wolin, 1960). The object of this study was to evaluate the nutritional quality of noodle waste (NW), tomato pomace (TP) and apple pomace (AP) using the gas production technique.

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