Abstract
Nine ruminally and duodenally cannulated steers (average BW 355 kg) were used to evaluate effects of prebloom alfalfa greenchop substitution at 20% of DMI on utilization of late-May (high quality; HQ; Period 1) and mid-August (low quality; LQ; Period 2) tall fescue greenchop. Alfalfa inclusion did not influence (P greater than .10) diet ad libitum DMI during Period 1 but it decreased (P less than .10) DMI during Period 2. Ruminal and total tract DM, cell wall, and GE digestibility of HQ were unaffected (P greater than .10) by alfalfa inclusion; however, digestibility of these constituents in LQ was increased (P less than .03) by alfalfa substitution. Alfalfa substitution did not influence (P greater than .10) dietary cell wall monosaccharide disappearance. Ruminal CP digestibility was greater (P less than .10) when steers received alfalfa, but microbial efficiency (grams of bacterial N/kilogram of OM truly digested in the rumen) was not enhanced (P greater than .10) by alfalfa inclusion in either HQ or LQ diets. There was a trend (P = .15) for greater microbial efficiency with alfalfa substitution to LQ. Ruminal particulate passage rate did not differ (P greater than .10) between treatments for either stage of maturity. Fluid passage rate was faster (P less than .10) in steers that received only LQ (7.1%/h) than in those fed LQ substituted with 20% alfalfa (5.0 %/h). Our data suggest that alfalfa inclusion in a low-quality fescue diet enhanced cell wall and GE digestibility.
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Claims 10
Claim · model-written summary
Alfalfa inclusion did not influence ad libitum DMI of the high-quality tall fescue diet (Period 1).
- Taxon
- tall fescue
Lolium arundinaceumt0 - Treatment
- alfalfa greenchop substitution at 20% of DMIe0
- Outcome
- diet ad libitum DMIe1
- Direction
- did not influencee1
- Qualifier
- P greater than .10e1
- Setting
- late-Maye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tall fescue greenchop”
e0“prebloom alfalfa greenchop substitution at 20% of DMI on utilization of late-May (high quality; HQ; Period 1)”
e1“Alfalfa inclusion did not influence (P greater than .10) diet ad libitum DMI during Period 1”
Claim · model-written summary
Alfalfa inclusion decreased ad libitum DMI during the low-quality period (Period 2).
- Taxon
- tall fescueLolium arundinaceumt0
- Treatment
- Alfalfa inclusione1
- Outcome
- DMI during Period 2e2
- Direction
- decreasede2
- Qualifier
- P less than .10e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tall fescue greenchop”
e1“Alfalfa inclusion did not influence (P greater than .10) diet ad libitum DMI during Period 1”
e2“it decreased (P less than .10) DMI during Period 2”
Claim · model-written summary
Ruminal and total tract DM, cell wall and GE digestibility of the high-quality diet were unaffected by alfalfa inclusion.
- Taxon
- tall fescueLolium arundinaceumt0
- Treatment
- alfalfa inclusione3
- Outcome
- Ruminal and total tract DM, cell wall, and GE digestibilitye3
- Direction
- were unaffectede3
- Qualifier
- P greater than .10e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tall fescue greenchop”
e3“Ruminal and total tract DM, cell wall, and GE digestibility of HQ were unaffected (P greater than .10) by alfalfa inclusion”
Claim · model-written summary
Alfalfa substitution increased digestibility of DM, cell wall and GE in the low-quality diet.
- Taxon
- tall fescueLolium arundinaceumt0
- Treatment
- alfalfa substitutione4
- Outcome
- digestibility of these constituentse4
- Direction
- increasede4
- Qualifier
- P less than .03e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tall fescue greenchop”
e4“digestibility of these constituents in LQ was increased (P less than .03) by alfalfa substitution”
Claim · model-written summary
Alfalfa substitution did not influence dietary cell wall monosaccharide disappearance.
- Taxon
- tall fescueLolium arundinaceumt0
- Treatment
- Alfalfa substitutione5
- Outcome
- dietary cell wall monosaccharide disappearancee5
- Direction
- did not influencee5
- Qualifier
- P greater than .10e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tall fescue greenchop”
e5“Alfalfa substitution did not influence (P greater than .10) dietary cell wall monosaccharide disappearance”
Claim · model-written summary
Ruminal CP digestibility was greater when steers received alfalfa.
- Taxon
- tall fescueLolium arundinaceumt0
- Treatment
- alfalfae6
- Outcome
- Ruminal CP digestibilitye6
- Direction
- greatere6
- Qualifier
- P less than .10e6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tall fescue greenchop”
e6“Ruminal CP digestibility was greater (P less than .10) when steers received alfalfa”
Claim · model-written summary
Alfalfa inclusion did not enhance microbial efficiency in either the high- or low-quality diet.
- Taxon
- tall fescueLolium arundinaceumt0
- Treatment
- alfalfa inclusione7
- Outcome
- microbial efficiencye7
- Direction
- not enhancede7
- Qualifier
- P greater than .10e7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tall fescue greenchop”
e7“microbial efficiency (grams of bacterial N/kilogram of OM truly digested in the rumen) was not enhanced (P greater than .10) by alfalfa inclusion in either HQ or LQ diets”
Claim · model-written summary
Alfalfa substitution to the low-quality diet showed a non-significant trend toward greater microbial efficiency.
- Taxon
- tall fescueLolium arundinaceumt0
- Treatment
- alfalfa substitutione1
- Outcome
- microbial efficiencye1
- Direction
- greatere1
- Qualifier
- trend (P = .15)e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tall fescue greenchop”
e1“There was a trend (P = .15) for greater microbial efficiency with alfalfa substitution to LQ”
Claim · model-written summary
Ruminal particulate passage rate did not differ between the alfalfa and non-alfalfa treatments for either maturity stage.
- Taxon
- tall fescueLolium arundinaceumt0
- Outcome
- Ruminal particulate passage ratee1
- Direction
- did not differe1
- Qualifier
- for either stage of maturitye1
- Comparator
- between treatmentse1
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tall fescue greenchop”
e1“Ruminal particulate passage rate did not differ (P greater than .10) between treatments for either stage of maturity”
Claim · model-written summary
Fluid passage rate was faster in steers fed only low-quality fescue (7.1%/h) than in those fed it substituted with 20% alfalfa (5.0%/h).
- Taxon
- tall fescueLolium arundinaceumt0
- Treatment
- LQ substituted with 20% alfalfae1
- Outcome
- Fluid passage ratee1
- Direction
- fastere1
- Value
- 7.1%/he1
- Qualifier
- P less than .10e1
- Comparator
- only LQe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tall fescue greenchop”
e1“Fluid passage rate was faster (P less than .10) in steers that received only LQ (7.1%/h) than in those fed LQ substituted with 20% alfalfa (5.0 %/h)”