scholarly journals Effect of Additives and Fermentation Periods on Chemical Composition and In situ Digestion Kinetics of Mott Grass (Pennisetum purpureum) Silage

2005 ◽  
Vol 18 (6) ◽  
pp. 812-815
Author(s):  
Mahr-un- Nisa ◽  
N. A. Touqir ◽  
M. Sarwar ◽  
M. Ajmal Khan ◽  
Mumtaz Akhtar
Keyword(s):  
Chemical Composition ◽  
Pennisetum Purpureum ◽  
Effect Of Additives ◽  
Digestion Kinetics ◽  
Kinetics Of

scholarly journals In situ ruminal digestion kinetics of forages and feed byproducts in cattle and buffalo

1998 ◽  
Vol 11 (2) ◽  
pp. 128-132 ◽  
Author(s):  
M. Sarwar ◽  
Mahr-un-Nisa ◽  
S. A. Bhatti ◽  
C. S. Ali
Keyword(s):  
Digestion Kinetics ◽  
Ruminal Digestion ◽  
Kinetics Of

scholarly journals Intake, Digestibility, and In Situ Digestion Kinetics of Treated Wheat Straw and Alfalfa Mixtures Fed to Holstein Heifers

1991 ◽  
Vol 74 (10) ◽  
pp. 3524-3534 ◽  
Author(s):  
D.G. Atwell ◽  
N.R. Merchen ◽  
E.H. Jaster ◽  
G.C. Fahey ◽  
L.L. Berger ◽  
...  
Keyword(s):  
Wheat Straw ◽  
Digestion Kinetics ◽  
Kinetics Of

Ruminal digestion kinetics of temper-rolled hulless barley

1996 ◽  
Vol 76 (4) ◽  
pp. 629-632 ◽  
Author(s):  
W. Z. Yang ◽  
K. A. Beauchemin ◽  
L. M. Rode
Keyword(s):  
Moisture Content ◽  
Barley Grain ◽  
Temper Rolling ◽  
Hulless Barley ◽  
Grain Processing ◽  
Ruminal Degradability ◽  
Digestion Kinetics ◽  
Ruminal Digestion ◽  
Kinetics Of

In situ ruminal digestion kinetics of temper-rolled hulless barley were affected by the moisture content of grain prior to processing. A moisture content of 21% resulted in optimum ruminal digestion of temper-rolled hulless barley. Key words: Hulless barley, grain processing, temper-rolling, in situ digestion, ruminal degradability

In vitro fermentation and in situ rumen degradation kinetics of summer forage brassica plants

2019 ◽  
Vol 59 (7) ◽  
pp. 1271 ◽  
Author(s):  
Juan P. Keim ◽  
Jaime Cabanilla ◽  
Oscar A. Balocchi ◽  
Rubén G. Pulido ◽  
Annick Bertrand
Keyword(s):  
Chemical Composition ◽  
Degradation Kinetics ◽  
Gas Production ◽  
In Vitro Fermentation ◽  
Fermentation Products ◽  
Rumen Degradation ◽  
Kinetics Of ◽  
Forage Rape

The aim of the present study was to assess and compare the nutrient concentration, the in vitro fermentation and the in situ rumen degradation characteristics of Brassica rapa ssp. rapa L. (turnips) and Brassica napus ssp. biennis L. (forage rape). Five varieties of each species were established in three field replicates and were organised in a randomised complete-block nested design. All varieties were harvested and further analysed for chemical composition, in vitro gas-production kinetics, volatile fatty acid (VFA) production and in situ degradation kinetics of dry matter (DM) and crude protein. Turnips showed higher ash, total sugars, raffinose, sucrose, glucose and fructose concentrations (P < 0.001) than did forage rape. Turnip varieties differed in their sucrose, glucose, fructose and total soluble sugar concentration (P < 0.001), whereas rape varieties differed in their neutral detergent fibre concentration (P = 0.004) and digestible organic matter on a DM basis (P < 0.01). Regarding DM-degradation parameters, turnips had a higher soluble fraction ‘a’ (P < 0.01) and a lower insoluble, but potentially degradable fraction ‘b’ (P < 0.01) than did rape, but the fractional degradation rate ‘c’ (0.18/h) was similar to that of rape. Rates of gas production were slightly higher (P = 0.018) for turnip than for rape. No effects for brassica species nor for varieties within species were detected (P > 0.05) for total in vitro VFA production, as well as for the relative proportions of acetate, propionate, butyrate, branch chained VFA and the actetate:propionate ratio. Our study showed that most of the differences that were observed in terms of chemical composition and degradation kinetics did not result in differences in in vitro fermentation products.

scholarly journals Digestibility and ruminal digestion kinetics of corn silage

2005 ◽  
Vol 57 (2) ◽  
pp. 223-228 ◽  
Author(s):  
O.N. Di Marco ◽  
M.S. Aello ◽  
S. Arias
Keyword(s):  
Fixed Effects ◽  
Exponential Model ◽  
In Vitro Digestibility ◽  
Passage Rate ◽  
Digestion Kinetics ◽  
Ruminal Digestion ◽  
Kinetics Of

The in situ dry matter (DM) disappearance of corn silages in two maturity stages (milk grain and half milk line) of known in vivo and in vitro digestibility was determined, with the main purpose of comparing digestibility values with the ruminal disappearance at 24 and 48h of incubation. A secondary goal was the description of their ruminal digestion kinetics, from which the effective degradability was calculated at an assumed passage rate of 4%/h. Data of in vivo, in vitro and in situ degradability at 24 and 48-h were analyzed with a linear model that included as fixed effects the maturity and the methodology of evaluation, and the kinetic data were described by the exponential model of McDonald. There was a significant effect (P<0.05) of methodology in the estimation of digestibility, but not of maturity or interaction maturity × methodology. The in vivo digestibility (52.9%) was not different from the 24-h in situ degradability (55.6%) with numerical values in the range of the effective degradability. The in vitro digestibility (61.6%) was not different from the 48-h in situ degradability (61.9%), being both estimates higher than the in vivo digestibility. The 24-h in situ degradability was a closer estimator of the in vivo digestibility and the 48-h in situ degradability and the in vitro digestibility overestimated the in vivo parameter by 15-20%.

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