Paper · 2001 · Iowa State University Digital Repository (Iowa State University)

Evaluation of Hay-Type and Grazing Tolerant Alfalfa Hybrids in Season-Long or Complementary Rotational Stocking Systems for Beef Cows

Mary L. Hermann; James R. Russell; Stephen K. Barnhart; et al.

11
claims
11
verbatim quotes
0
citations
1
research areas
✓
Open access

Abstract

Pastures containing hay-type and grazing tolerant alfalfa hybrids were grazed in a season-long or complimentary rotational stocking system with Nfertilized smooth bromegrass. The pastures were stocked at a seasonal density of .8 cow-calf pairs per acre for 120 days. Pastures were intensively managed by daily strip-stocking with the assumptions that 50% of live forage was available and daily live dry matter consumption of each cow-calf pair was 3.5% of the cow’s body weight. First-cutting forage was harvested as hay from 40% of pasture acres to remove excess forage growth early in the grazing season. Forage was grazed from the remaining 60% of each pasture for the first 44 days of the experiment and then from the entire pasture thereafter. Live forage yields, estimated by monthly clippings, were greater in May and September on the season-long alfalfa pastures compared with the complementary pastures and on the alfalfa pastures compared with the N-fertilized smooth bromegrass pastures. The proportions of legumes in the live dry matter in pastures with grazing tolerant and hay-type alfalfas in the season-long grazing systems declined by 70% and 50%, respectively, in the 120 day trial. The proportions of legumes in the live dry matter in pastures with grazing tolerant and the hay-type alfalfas in the complementary grazing system declined 60% and 42%, respectively, in the 120 day trial. Cows grazing either alfalfa hybrid by either management system had greater weight gains during the breeding and grazing seasons and greater increases in body condition score prebreeding and during the breeding season than the cows that grazed N-fertilized smooth bromegrass for the entire season. Also, cows grazing either alfalfa in the season-long system had greater breeding season increases in body condition score than cows grazing alfalfa in the complementary system with N-fertilized smooth bromegrass. Daily gains and seasonal gains of calves from cows grazing the alfalfa pastures tended to be greater than those grazing N-fertilized smooth bromegrass. Within alfalfa treatments, calves of cows grazing alfalfa pastures in the season-long system tended to produce more pounds per acre than those of cows grazing alfalfa in the complementary systems.

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Claims 11

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Season-long alfalfa pastures had greater live forage yields in May and September than complementary pastures.

Taxon
alfalfaMedicago sativae1
Treatment
season-long alfalfa pasturese1
Outcome
Live forage yieldse1
Direction
greatere1
Qualifier
May and Septembere1
Comparator
complementary pasturese1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Medicago sativa
Medicago sativa · TaxonDrepanostoma · CC BY 4.0 · iNaturalist ↗

Verbatim

e1

“Live forage yields, estimated by monthly clippings, were greater in May and September on the season-long alfalfa pastures compared with the complementary pastures”

✓ located verbatim in the source · abstract, characters 749–911 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Alfalfa pastures had greater live forage yields in May and September than N-fertilized smooth bromegrass pastures.

Taxon
alfalfaMedicago sativae1
Treatment
alfalfa pasturese1
Outcome
Live forage yieldse1
Direction
greatere1
Qualifier
May and Septembere1
Comparator
N-fertilized smooth bromegrass pasturese1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Medicago sativa
Medicago sativa · TaxonDrepanostoma · CC BY 4.0 · iNaturalist ↗

Verbatim

e1

“Live forage yields, estimated by monthly clippings, were greater in May and September on the season-long alfalfa pastures compared with the complementary pastures and on the alfalfa pastures compared with the N-fertilized smooth bromegrass pastures”

✓ located verbatim in the source · abstract, characters 749–997 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Legume proportion in live dry matter declined by 70% in 120 days in season-long pastures with grazing tolerant alfalfa.

Taxon
alfalfaMedicago sativae1
Material
grazing tolerante1
Treatment
season-long grazing systemse1
Outcome
proportions of legumes in the live dry mattere1
Direction
declinede1
Value
70%e1
Qualifier
in the 120 day triale1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Medicago sativa
Medicago sativa · TaxonDrepanostoma · CC BY 4.0 · iNaturalist ↗

Verbatim

e1

“The proportions of legumes in the live dry matter in pastures with grazing tolerant and hay-type alfalfas in the season-long grazing systems declined by 70% and 50%, respectively, in the 120 day trial”

✓ located verbatim in the source · abstract, characters 999–1199 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Legume proportion in live dry matter declined by 50% in 120 days in season-long pastures with hay-type alfalfa.

Taxon
alfalfaMedicago sativae1
Material
hay-typee1
Treatment
season-long grazing systemse1
Outcome
proportions of legumes in the live dry mattere1
Direction
declinede1
Value
50%e1
Qualifier
in the 120 day triale1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Medicago sativa
Medicago sativa · TaxonDrepanostoma · CC BY 4.0 · iNaturalist ↗

Verbatim

e1

“The proportions of legumes in the live dry matter in pastures with grazing tolerant and hay-type alfalfas in the season-long grazing systems declined by 70% and 50%, respectively, in the 120 day trial”

✓ located verbatim in the source · abstract, characters 999–1199 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Legume proportion in live dry matter declined by 60% in 120 days in complementary grazing with grazing tolerant alfalfa.

Taxon
alfalfaMedicago sativae1
Material
grazing tolerante1
Treatment
complementary grazing systeme1
Outcome
proportions of legumes in the live dry mattere1
Direction
declinede1
Value
60%e1
Qualifier
in the 120 day triale1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Medicago sativa
Medicago sativa · TaxonDrepanostoma · CC BY 4.0 · iNaturalist ↗

Verbatim

e1

“The proportions of legumes in the live dry matter in pastures with grazing tolerant and the hay-type alfalfas in the complementary grazing system declined 60% and 42%, respectively, in the 120 day trial”

✓ located verbatim in the source · abstract, characters 1201–1403 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Legume proportion in live dry matter declined by 42% in 120 days in complementary grazing with hay-type alfalfa.

Taxon
alfalfaMedicago sativae1
Material
hay-typee1
Treatment
complementary grazing systeme1
Outcome
proportions of legumes in the live dry mattere1
Direction
declinede1
Value
42%e1
Qualifier
in the 120 day triale1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Medicago sativa
Medicago sativa · TaxonDrepanostoma · CC BY 4.0 · iNaturalist ↗

Verbatim

e1

“The proportions of legumes in the live dry matter in pastures with grazing tolerant and the hay-type alfalfas in the complementary grazing system declined 60% and 42%, respectively, in the 120 day trial”

✓ located verbatim in the source · abstract, characters 1201–1403 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Cows grazing either alfalfa hybrid had greater weight gains during the breeding and grazing seasons than cows grazing N-fertilized smooth bromegrass all season.

Taxon
alfalfaMedicago sativae1
Treatment
grazing either alfalfa hybrid by either management systeme1
Interactor
cowsBos tauruse1herbivore
Outcome
weight gainse1
Direction
greatere1
Qualifier
during the breeding and grazing seasonse1
Comparator
N-fertilized smooth bromegrasse1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Medicago sativa
Medicago sativa · TaxonDrepanostoma · CC BY 4.0 · iNaturalist ↗
Bos taurus
Bos taurus · InteractorJjron , edited by Fir0002 · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“Cows grazing either alfalfa hybrid by either management system had greater weight gains during the breeding and grazing seasons and greater increases in body condition score prebreeding and during the breeding season than the cows that grazed N-fertilized smooth bromegrass for the entire season”

✓ located verbatim in the source · abstract, characters 1405–1700 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Cows grazing either alfalfa hybrid had greater body condition score increases prebreeding and during breeding than cows grazing N-fertilized smooth bromegrass all season.

Taxon
alfalfaMedicago sativae1
Treatment
grazing either alfalfa hybrid by either management systeme1
Interactor
cowsBos tauruse1herbivore
Outcome
increases in body condition scoree1
Direction
greatere1
Qualifier
prebreeding and during the breeding seasone1
Comparator
N-fertilized smooth bromegrasse1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Medicago sativa
Medicago sativa · TaxonDrepanostoma · CC BY 4.0 · iNaturalist ↗
Bos taurus
Bos taurus · InteractorJjron , edited by Fir0002 · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“Cows grazing either alfalfa hybrid by either management system had greater weight gains during the breeding and grazing seasons and greater increases in body condition score prebreeding and during the breeding season than the cows that grazed N-fertilized smooth bromegrass for the entire season”

✓ located verbatim in the source · abstract, characters 1405–1700 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Cows in season-long alfalfa grazing had greater breeding season body condition score increases than cows in complementary alfalfa grazing.

Taxon
alfalfaMedicago sativae1
Treatment
cows grazing either alfalfa in the season-long systeme1
Interactor
cowsBos tauruse1herbivore
Outcome
increases in body condition scoree1
Direction
greatere1
Qualifier
breeding seasone1
Comparator
cows grazing alfalfa in the complementary systeme1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Medicago sativa
Medicago sativa · TaxonDrepanostoma · CC BY 4.0 · iNaturalist ↗
Bos taurus
Bos taurus · InteractorJjron , edited by Fir0002 · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“Also, cows grazing either alfalfa in the season-long system had greater breeding season increases in body condition score than cows grazing alfalfa in the complementary system with N-fertilized smooth bromegrass”

✓ located verbatim in the source · abstract, characters 1702–1913 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Daily and seasonal gains of calves from cows grazing alfalfa tended to be greater than those grazing N-fertilized smooth bromegrass.

Taxon
alfalfaMedicago sativae1
Treatment
cows grazing the alfalfa pasturese1
Interactor
calvese1herbivore
Outcome
Daily gains and seasonal gains of calvese1
Direction
greatere1
Qualifier
tendede1
Comparator
N-fertilized smooth bromegrasse1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Medicago sativa
Medicago sativa · TaxonDrepanostoma · CC BY 4.0 · iNaturalist ↗

Verbatim

e1

“Daily gains and seasonal gains of calves from cows grazing the alfalfa pastures tended to be greater than those grazing N-fertilized smooth bromegrass”

✓ located verbatim in the source · abstract, characters 1915–2065 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Calves of cows in season-long alfalfa grazing tended to produce more pounds per acre than calves of cows in complementary alfalfa grazing.

Taxon
alfalfaMedicago sativae1
Treatment
season-long systeme1
Interactor
calvese1herbivore
Outcome
pounds per acree1
Direction
moree1
Qualifier
tendede1
Comparator
those of cows grazing alfalfa in the complementary systemse1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Medicago sativa
Medicago sativa · TaxonDrepanostoma · CC BY 4.0 · iNaturalist ↗

Verbatim

e1

“Within alfalfa treatments, calves of cows grazing alfalfa pastures in the season-long system tended to produce more pounds per acre than those of cows grazing alfalfa in the complementary systems”

✓ located verbatim in the source · abstract, characters 2067–2262 · show in text ↑

climate site · yield · Medicago sativa (alfalfa)Positive and negative results

13 papers: 6 positive, 7 negative or no effect

5 papers in the same direction as this paper · 6 in the opposite direction · 1 reporting no difference from an alternative

  1. negative
  2. no effect
    Annual yields were equal under distributed and withheld irrigation.

    Alfalfa Response to Irrigation from Limited Water Supplies · 2013 · compared with withheld between the second and third cuttings

    Opposite direction

  3. negative

9 papers more in this group

See all 13 papers →

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.