乾燥および凍結牧草給与子牛の第一胃内揮発性脂肪酸の産生について

押尾 秀一; 田畑 一良; 小林 春雄; 阿見 艶子

doi:10.2508/chikusan.52.805

Volatile Fatty Acid Production in the Rumina of Calves Fed Dried or Frozen Herbage

Shuichi OSHIO, Ichiro TAHATA, HARUO KOBAYASHI, Tsuyako AMI

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JOURNAL FREE ACCESS

1981 Volume 52 Issue 11 Pages 805-812

DOI https://doi.org/10.2508/chikusan.52.805

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Published: November 25, 1981 Received: April 20, 1981 Available on J-STAGE: March 10, 2008 Accepted: - Advance online publication: - Revised: -
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Date of correction: March 10, 2008 Reason for correction: - Correction: ABSTRACT Details: Wrong : Three experiments were conducted in order to investigate the production rate of volatile fatty acids (VFA) and some of their characteristics in the rumina of calves fed dried or frozen herbage, using twenty-two Holstein calves fitted with permanentrumen fistula. Herbage harvested from the same field at the same time was dehydrated at once or freeze-stored until feeding. VFA production rate was measured with a single injection method using ¹⁴C-acetate and polyethylene glycol (PEG). The results obtained were as follows: 1) The digestibility of crude protein and nitrogen free extract of the herbage was noticeably depressed by high temperature drying. 2) The pH value of rumen fluid was slightly lower for frozen herbage, but VFA concentrations showed no differences between the two diets. With regard to the molar proportions of VFA, acetic acid was higher and isobutyric acid and isovaleric acid were lower for dried herbage. 3) Relative rumen volume and the rate constant for VFA absorption from the rumen wall showed no differences between the two diets. However, the outflow rate of rumen fluid was higher for frozen herbage. 4) The percentage of energy derived from rumen VFA in ingested digestible energy was significantly (P‹0.05) higher for frozen herbage, indicating an average of 64.1% for frozen add 54.6% for dried herbage. 5) A significant relationship between ingested digestible dry matter and VFA production rate in the rumen was recognized. The equation was as follows: Y=0.12+10.21X (r=0.97; n=22, P‹0.001), where Y is the VFA production rate in the rumen (mole/day) and X is the ingested digestible dry matter (kg/day).
Right : Three experiments were conducted in order to investigate the production rate of volatile fatty acids (VFA) and some of their characteristics in the rumina of calves fed dried or frozen herbage, using twenty-two Holstein calves fitted with permanentrumen fistula. Herbage harvested from the same field at the same time was dehydrated at once or freeze-stored until feeding. VFA production rate was measured with a single injection method using ¹⁴C-acetate and polyethylene glycol (PEG). The results obtained were as follows: 1) The digestibility of crude protein and nitrogen free extract of the herbage was noticeably depressed by high temperature drying. 2) The pH value of rumen fluid was slightly lower for frozen herbage, but VFA concentrations showed no differences between the two diets. With regard to the molar proportions of VFA, acetic acid was higher and isobutyric acid and isovaleric acid were lower for dried herbage. 3) Relative rumen volume and the rate constant for VFA absorption from the rumen wall showed no differences between the two diets. However, the outflow rate of rumen fluid was higher for frozen herbage. 4) The percentage of energy derived from rumen VFA in ingested digestible energy was significantly (P<0.05) higher for frozen herbage, indicating an average of 64.1% for frozen add 54.6% for dried herbage. 5) A significant relationship between ingested digestible dry matter and VFA production rate in the rumen was recognized. The equation was as follows: Y=0.12+10.21X (r=0.97; n=22, P<0.001), where Y is the VFA production rate in the rumen (mole/day) and X is the ingested digestible dry matter (kg/day).

Date of correction: March 10, 2008 Reason for correction: - Correction: PDF FILE Details: -

Date of correction: March 10, 2008 Reason for correction: - Correction: ABSTRACT Details: Wrong : Three experiments were conducted in order to investigate the production rate of volatile fatty acids (VFA) and some of their characteristics in the rumina of calves fed dried or frozen herbage, using twenty-two Holstein calves fitted with permanentrumen fistula. Herbage harvested from the same field at the same time was dehydrated at once or freeze-stored until feeding. VFA production rate was measured with a single injection method using ¹⁴C-acetate and polyethylene glycol (PEG). The results obtained were as follows: 1) The digestibility of crude protein and nitrogen free extract of the herbage was noticeably depressed by high temperature drying. 2) The pH value of rumen fluid was slightly lower for frozen herbage, but VFA concentrations showed no differences between the two diets. With regard to the molar proportions of VFA, acetic acid was higher and isobutyric acid and isovaleric acid were lower for dried herbage. 3) Relative rumen volume and the rate constant for VFA absorption from the rumen wall showed no differences between the two diets. However, the outflow rate of rumen fluid was higher for frozen herbage. 4) The percentage of energy derived from rumen VFA in ingested digestible energy was significantly (P‹0.05) higher for frozen herbage, indicating an average of 64.1% for frozen add 54.6% for dried herbage. 5) A significant relationship between ingested digestible dry matter and VFA production rate in the rumen was recognized. The equation was as follows: Y=0.12+10.21X (r=0.97; n=22, P‹0.001), where Y is the VFA production rate in the rumen (mole/day) and X is the ingested digestible dry matter (kg/day).
Right : Three experiments were conducted in order to investigate the production rate of volatile fatty acids (VFA) and some of their characteristics in the rumina of calves fed dried or frozen herbage, using twenty-two Holstein calves fitted with permanentrumen fistula. Herbage harvested from the same field at the same time was dehydrated at once or freeze-stored until feeding. VFA production rate was measured with a single injection method using ¹⁴C-acetate and polyethylene glycol (PEG). The results obtained were as follows: 1) The digestibility of crude protein and nitrogen free extract of the herbage was noticeably depressed by high temperature drying. 2) The pH value of rumen fluid was slightly lower for frozen herbage, but VFA concentrations showed no differences between the two diets. With regard to the molar proportions of VFA, acetic acid was higher and isobutyric acid and isovaleric acid were lower for dried herbage. 3) Relative rumen volume and the rate constant for VFA absorption from the rumen wall showed no differences between the two diets. However, the outflow rate of rumen fluid was higher for frozen herbage. 4) The percentage of energy derived from rumen VFA in ingested digestible energy was significantly (P<0.05) higher for frozen herbage, indicating an average of 64.1% for frozen add 54.6% for dried herbage. 5) A significant relationship between ingested digestible dry matter and VFA production rate in the rumen was recognized. The equation was as follows: Y=0.12+10.21X (r=0.97; n=22, P<0.001), where Y is the VFA production rate in the rumen (mole/day) and X is the ingested digestible dry matter (kg/day).

Date of correction: March 10, 2008 Reason for correction: - Correction: PDF FILE Details: -

Abstract

Three experiments were conducted in order to investigate the production rate of volatile fatty acids (VFA) and some of their characteristics in the rumina of calves fed dried or frozen herbage, using twenty-two Holstein calves fitted with permanentrumen fistula. Herbage harvested from the same field at the same time was dehydrated at once or freeze-stored until feeding. VFA production rate was measured with a single injection method using ¹⁴C-acetate and polyethylene glycol (PEG). The results obtained were as follows: 1) The digestibility of crude protein and nitrogen free extract of the herbage was noticeably depressed by high temperature drying. 2) The pH value of rumen fluid was slightly lower for frozen herbage, but VFA concentrations showed no differences between the two diets. With regard to the molar proportions of VFA, acetic acid was higher and isobutyric acid and isovaleric acid were lower for dried herbage. 3) Relative rumen volume and the rate constant for VFA absorption from the rumen wall showed no differences between the two diets. However, the outflow rate of rumen fluid was higher for frozen herbage. 4) The percentage of energy derived from rumen VFA in ingested digestible energy was significantly (P<0.05) higher for frozen herbage, indicating an average of 64.1% for frozen add 54.6% for dried herbage. 5) A significant relationship between ingested digestible dry matter and VFA production rate in the rumen was recognized. The equation was as follows: Y=0.12+10.21X (r=0.97; n=22, P<0.001), where Y is the VFA production rate in the rumen (mole/day) and X is the ingested digestible dry matter (kg/day).

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