Abstract
Effects on microbial fermentation were determined when buffer containing urea, branched-chain volatile fatty acids, a combination of these infusates or buffer only was infused into fermenters fed diets containing soybean meal treated with .3% formaldehyde or untreated. Fermentations were conducted at a solids retention time of 16 h and a liquid dilution rate of 12%/h. When buffer only was infused, the diet containing formaldehyde-treated soybean meal depressed digestibilities of NDF and ADF and fat-free organic matter compared with diets containing untreated soybean meal. In cultures fed treated soybean meal, digestibilities were partially restored by either infusion of urea or branched-chain acids and were increased to control levels by the combined infusates. Nitrogen digestion (35 vs. 69%) and microbial protein production (1.27 vs. 1.60 g/d) were depressed in fermenters fed the treated soybean meal, and neither was improved by the infusions. The data suggest microbial growth 5 have been impaired by a wide ratio of nonstructural carbohydrate to degradable protein when the formaldehyde-treated protein was fed.
Original language | English (US) |
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Pages (from-to) | 737-744 |
Number of pages | 8 |
Journal | Journal of Dairy Science |
Volume | 71 |
Issue number | 3 |
DOIs | |
State | Published - 1988 |
ASJC Scopus subject areas
- Food Science
- Animal Science and Zoology
- Genetics