Effects of buffer additions on fermentation of dormant range grasses
Issue Date
1995-01-01Keywords
dormancybranched chain fatty acids
fermentation
starch
buffers
arginine
histidine
isoleucine
leucine
methionine
warm season shortgrasses
feed additives
urea
Bromus japonicus
artificial rumen
fiber content
South Dakota
chemical composition
species differences
crude protein
Pascopyrum smithii
in vitro digestibility
grasses
Metadata
Show full item recordCitation
Momont, P. A., Pruitt, R. J., Pritchard, R. H., & Johnson, P. S. (1995). Effects of buffer additions on fermentation of dormant range grasses. Journal of Range Management, 48(1), 39-44.Publisher
Society for Range ManagementJournal
Journal of Range ManagementDOI
10.2307/4002502Additional Links
https://rangelands.org/Abstract
Replicated two-stage in vitro studies were conducted to determine the effects of single amino acid or branched-chain volatile fatty acid buffer additions on in vitro dry matter disappearance, neutral detergent fiber disappearance, and fermentation kinetics of dormant range grasses. Substrates consisted of separate samples of 2 cool season mid-grasses, western wheatgrass (Agropyron smithii Rydb.) and Japanese brome (Bromus japonicus Thunb.), and a mixture of warm season shortgrasses, buffalograss (Bunchloe dactyloids [Nutt.] Engelm.), and blue grama (Bouteloua gracilis [H.B.K.] Lag. ex Steud.), hand clipped from standing forage in mid-March. Isonitrogenous treatments included buffer containing urea with or without amino acids, branched-chain volatile fatty acids, sodium sulfate, or starch. Urea increased (P < 0.05) in vitro dry matter disappearance and in vitro neutral detergent fiber disappearance of the cool season grasses over N free buffer. Methionine addition increased (P < 0.05) in vitro neutral detergent fiber disappearance and rate of fermentation of both cool season grasses and in vitro dry matter disappearance of Japanese brome over urea alone. Sodium sulfate increased (P < 0.05) in vitro neutral detergent fiber disappearance of Japanese brome compared to urea alone. None of the branched-chain volatile fatty acids tested increased dry matter disappearance, neutral detergent fiber disappearance, or rate of fermentation of the dormant range grasses. Addition of urea or amino acids did not increase in vitro dry matter disappearance or in vitro neutral detergent fiber disappearance of the shortgrass mixture. In vitro screening of amino acid and branched-chain volatile fatty acid buffer additions to dormant range grasses showed that methionine supplementation with urea offers the greatest potential, among the supplements evaluated, for improving digestibility and rate of fermentation of cool season grasses. None of the buffer supplements improved fermentation of the warm season grasses.Type
textArticle
Language
enISSN
0022-409Xae974a485f413a2113503eed53cd6c53
10.2307/4002502