عنوان

Effects of ammonia, sulfur and isoacids on in vitro ruminal fermentation of tropical forages

Number

TLpq303972303

.Language of Text, Soundtrack etc

انگلیسی

Title Proper

Effects of ammonia, sulfur and isoacids on in vitro ruminal fermentation of tropical forages

General Material Designation

[Thesis]

First Statement of Responsibility

S. A. Rodriguez-Medina

Subsequent Statement of Responsibility

R. M. Cook

Name of Publisher, Distributor, etc.

Michigan State University

Date of Publication, Distribution, etc.

1992

Specific Material Designation and Extent of Item

108

Dissertation or thesis details and type of degree

M.S.

Body granting the degree

Michigan State University

Text preceding or following the note

1992

Text of Note

The effects of two levels of NH3, sulfur and isoacids on in vitro ruminal true digestibility (IVTD) of eight tropical forages was studied using a 2 factorial design. Trypticase was added to the final incubation media. This casein hydrolyzate should not have been added because it contributes NH3, isoacids and sulfur. This raised the levels of NH3 from the expected 5-10 to 17-26 mg/dl and isoacid levels about 3-fold. Sulfur levels were not affected. The results are discussed in light of trypticase addition. After a 48 h in vitro ruminal fermentation, NDF, ADF and lignin were measured to estimate IVTD. The results showed that IVTD increased with high levels of NH3 and when isoacids were added to treatments low in NH3. IVTD decreased when both NH3 and isoacids were high. High levels of sulfur tended to decrease IVTD for all forages, except elephant grass. Addition of isoacids increased total VFA concentration.

Biological sciences

Livestock

R. M. Cook

S. A. Rodriguez-Medina

Electronic name

p

[Thesis]

276903

a

Y