Chemical Compositions and Nutritional Evaluation of Energy Feeds For Ruminant Using In vitro Gas Production Technique

2007 ◽  
Vol 6 (6) ◽  
pp. 607-612 ◽  
Author(s):  
Songsak Chumpawade ◽  
Anut Chantirati ◽  
Piyanate Chantirati
Keyword(s):  
Gas Production ◽  
Chemical Compositions ◽  
Production Technique ◽  
Nutritional Evaluation ◽  
In Vitro Gas Production

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

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

scholarly journals 19. Improving the Prediction of Methane Production Determined by in Vitro Gas Production Technique for Ruminants

2016 ◽  
Vol 16 (2) ◽  
pp. 565-584
Author(s):  
Chung-Nan Chen ◽  
Tzu-Tai Lee ◽  
Bi Yu
Keyword(s):  
Chemical Composition ◽  
Starch Content ◽  
Gas Production ◽  
Neutral Detergent Fiber ◽  
Chemical Compositions ◽  
Production Technique ◽  
In Vitro Gas Production ◽  
True Digestibility ◽  
Protein Rich

Abstract Twelve feedstuffs (cereals, fibrous byproducts, protein-rich byproducts and forages) were determined for methane (CH4) production by the in vitro gas production technique (IVGPT) and were correlated with their chemical compositions to predict enteric CH4 originating from these feedstuffs in ruminants. Corn, soybean hull, soybean meal and corn silage generated the highest CH4 production from their respective categories. The average CH4 production of fibrous byproducts (44.6 ml/g DM incubated) was significantly higher than that of cereals (40.3 ml/g DM incubated), forages (33.3 ml/g DM incubated) and protein-rich byproducts (31.0 ml/g DM incubated) after the 48-h incubation (P≤0.05). The highest average total volatile fatty acid (VFA) concentration was determined in cereals (53.6 mM). The acetate to propionate ratio was significantly lower in cereals when compared with other categories of feedstuff (P≤0.05). The correlation analysis showed that in vitro true digestibility (IVTD) positively correlated with the CH4 production in all four categories of feedstuffs (P≤0.05). The neutral detergent fiber (NDF) and acid detergent fiber (ADF) content positively correlated with CH4 production in every category of feedstuffs except cereals. The starch content negatively correlated with CH4 production for fibrous and protein-rich byproducts (P≤0.05), but it positively correlated with CH4 production for forages (P≤0.05). The CH4 production was predicted more accurately by the equations proposed for each category (R2=0.944, 0.876, 0.942 and 0.915 for cereals, fibrous and protein-rich byproducts and forages, respectively) than for the unclassified feedstuffs (R2=0.715). In conclusion, the contribution of individual chemical composition to CH4 production differed depending on the category of feedstuffs. The precision of CH4 prediction could be substantially improved by classifying feedstuffs into categories according to their chemical composition, and selecting the appropriate predictors for each category. Information about the CH4 output of these feedstuffs will be useful in formulating low CH4-producing diets for ruminants.

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.

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