Effect of aqueous ammonia and other alkalis on the in-vitro digestibility of barley straw

1978 ◽  
Vol 29 (2) ◽  
pp. 92-98 ◽  
Author(s):  
Roy D. Hartley ◽  
Edwin C. Jones
Keyword(s):  
Aqueous Ammonia ◽  
Barley Straw ◽  
In Vitro Digestibility

Relative efficacy of inocula from rumen fluid or faecal solution for determining in vitro digestibility and gas production

1998 ◽  
Vol 78 (4) ◽  
pp. 673-679 ◽  
Author(s):  
A. El-Meadaway ◽  
Z. Mir ◽  
P. S. Mir ◽  
M. S. Zaman ◽  
L. J. Yanke
Keyword(s):  
Rumen Fluid ◽  
Relative Size ◽  
Barley Grain ◽  
Gas Production ◽  
Barley Straw ◽  
In Vitro Digestibility ◽  
Production Values ◽  
Cattle Faeces ◽  
Faecal Suspension

Three experiments were conducted to study the effects of substituting rumen fluid (RF) with faecal suspension (FS) as an inoculum for determination of in vitro dry matter digestibility (IVDMD, experiment 1) and gas production (exp. 2). Barley grain (BG), Persian clover (PC), alfalfa (ALF), bromegrass (BR) and barley straw (BS) were used to evaluate the efficacy of the two inocula. In exp. 1, IVDMD was determined using RF or FS containing 3, 6 and 9% fresh cattle faeces as inocula. Except for BS, IVDMD values obtained with either RF or FS containing 3% faeces were not different (P > 0.05). In contrast, FS containing 6 or 9% faeces resulted in lower (P < 0.05) IVDMD than those obtained with RF. Total VFA, butyric and valeric acids of in vitro supernatant were higher (P < 0.05) in RF than FS incubated buffers. Molar proportions of acetic and propionic acids were variable among feeds. Mean acetic:propionic ratio was similar (except for BG) for RF or FS. In exp. 2, substitution of RF with FS containing 6, 11 or 16% cattle faeces as inoculum generally resulted in an increased lag time for four feeds (PC was not included). The rate of gas production was lower when FS was used instead of RF for ALF and BR. For BG however, use of FS resulted in a higher (P < 0.05) rate of gas production than when RF was used. Total gas production values were similar within all the feeds regardless of the source of inoculum. In experiment 3, the relative size of the total and cellulolytic populations were higher for RF than for FS, with a greater diversity of genera of bacteria isolated from RF. Results from this study indicate that FS has the potential to be used instead of RF to obtain IVDMD and gas production for BG and forage hay but not for poor quality roughages such as BS. However, more research with FS is required to confirm these findings. Key words: IVDMD, gas production, rumen fluid, faecal suspension

EFFECT OF SULPHUR DIOXIDE AND AMMONIA ON CHEMICAL COMPOSITION AND IN VITRO DIGESTIBILITY OF CORN STOVER AND BARLEY STRAW

1989 ◽  
Vol 69 (4) ◽  
pp. 963-972 ◽  
Author(s):  
E. INNOCENTI ◽  
D. N. MOWAT ◽  
I. B. MANDELL
Keyword(s):  
Chemical Composition ◽  
Corn Stover ◽  
Sulphur Dioxide ◽  
Crop Residues ◽  
Treatment Time ◽  
Lignin Content ◽  
Temperature Treatment ◽  
Barley Straw ◽  
In Vitro Digestibility

The effects of temperature, treatment time and levels of SO2 and NH3 on the in vitro digestibility and chemical composition of corn stover and barley straw were evaluated. Sulphur dioxide improved (P > 0.05) in vitro dry matter digestibility (IVDMD) and in vitro cell wall digestibility (IVCWD) of corn stover when treated at 70 °C for 24 h. However, high SO2 levels (4 and 6%) at higher temperature (90 °C) and for a longer time (72 h) reduced (P < 0.05) IVDMD and IVCWD and increased (P < 0.05) lignin content. When barley straw was treated with SO2 at 70 °C, IVDMD and IVCWD were greater (P < 0.05) when the treatment was carried out for 72 h than for 24 h. The improvement in in vitro digestibilities with SO2 was associated with solubilization of large amounts of hemicellulose. Ammonia treatment at 70 °C for 24 h reduced (P < 0.05) hemicellulose content and increased (P < 0.05) IVDMD and IVCWD as well as apparent lignin content. Suphuration enhanced the effect of ammoniation on IVDMD and IVCWD and reduced lignin content, but did not further reduce hemicellulose over NH3 alone in both crop residues. Improvements in in vitro digestibilities obtained with NH3 treatment followed by SO2 were associated with reductions of hemicellulose and lignin. Sulphur dioxide and NH3 treatment at 70 °C for 24 h produced a greater improvement in IVDMD and IVCWD in barley straw than in corn stover. Treatment with SO2 following ammoniation further increased (P < 0.05) NH3-N and sulphur contents of corn stover. Key words: Chemical treatment, sulphur dioxide, ammonia, corn stover, barley straw, chemical composition, in vitro digestibility

Intake and liveweight response of sheep fed three ground and pelleted cereal straws

1974 ◽  
Vol 14 (69) ◽  
pp. 449 ◽  
Author(s):  
JG Mulholland ◽  
JB Coombe ◽  
WR McManus
Keyword(s):  
Wheat Straw ◽  
Dry Matter ◽  
Dry Matter Intake ◽  
Barley Straw ◽  
In Vitro Digestibility ◽  
Oat Straw ◽  
Highly Correlated

Wheat, oat and barley straws, ground and pelleted, with and without supplements of urea and minerals, were fed to groups of sheep in pens. Dry matter intake of oat straw was 53 per cent higher than that of wheat straw, which was 33 per cent higher than that of barley straw. Intake of straw was highly correlated with in vitro digestibility. Liveweight losses reflected changes in intake and were lowest on the oat straw and highest on the barley straw. Over all diets supplementation significantly increased intake and reduced liveweight loss.

EFFECT OF PROCESSING METHODS ON THE IN VITRO DIGESTIBILITY OF SODIUM HYDROXIDE TREATED ROUGHAGES

1970 ◽  
Vol 50 (3) ◽  
pp. 657-662 ◽  
Author(s):  
B. G. OLOLADE ◽  
D. N. MOWAT ◽  
J. E. WINCH
Keyword(s):  
Sodium Hydroxide ◽  
Dry Matter ◽  
Water Solubility ◽  
Lignin Content ◽  
Barley Straw ◽  
In Vitro Digestibility ◽  
Acid Detergent Fiber ◽  
Dry Matter Digestibility ◽  
Naoh Treatment

The response of roughages to sodium hydroxide (NaOH) treatment varied with type of roughage. Treatment with NaOH at 23 C for 24 hr increased in vitro dry matter digestibility (IVDMD) by 8,5, 39.6 and 21.5 percentage units for alfalfa stem, barley straw and corn stover, respectively. Increased IVDMD values were brought about, in part, by increased water solubility and decreased cell wall constituents. No significant changes occurred in acid detergent fiber, cellulose or lignin content. The IVDMD values of barley straw ranged from 38% at 0% NaOH to 81% with 12% NaOH at 130 C. At all temperatures and durations, IVDMD increased with increase in concentration of NaOH up to the 8% level. Above 8% NaOH, no further increase in IVDMD occurred. Temperature affected the rate as well as the extent of the response to NaOH. Treatments at 100 C for 90 min resulted in IVDMD values approximately 10 percentage units higher than at 23 C for 24 hr.

In Vitro Digestibility of Barley Straw Treated with Sodium Hydroxide

1972 ◽  
Vol 15 (6) ◽  
pp. 1091-1093 ◽  
Author(s):  
S. L. Phoenix ◽  
W. K. Bilanski ◽  
D. N. Mowat
Keyword(s):  
Sodium Hydroxide ◽  
Barley Straw ◽  
In Vitro Digestibility
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