Abstract
The native grasses are not widely grown for cultivated pastures in the South but are important forage producers in the United States. Their responses to frequency of clipping are not widely known and appear to be significantly different from that of the introduced cultivars, Bermudagrass (Cynodon dactylon) and Bahiagrass (Paspalum notatum). The introduced species, however, are slow to initiate growth in the spring, and it appears that the forage program in the South could be improved significantly by grazing switchgrass before the summer perennials initiate growth. Haying at flowering and grazing following frost could utilize the switchgrass later in the summer. Pangburn switchgrass (Panicum virgatum L.), a native species, tolerated one clipping during the season with little or no reduction in forage production, clonal survival, tiller number per clone, or tiller height. However, two or more clippings per season reduced all of the above. Over-utilization of switchgrass at the start of the season decreased the number of tillers and clones per plot and resulted in a serious weed problem.
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Claims 8
Claim · model-written summary
One clipping per season caused little or no reduction in switchgrass forage production or clonal survival.
- Taxon
- switchgrass
Panicum virgatume1 - Material
- Pangburne1
- Treatment
- one clipping during the seasone2
- Outcome
- forage production, clonal survivale2
- Direction
- little or no reductione2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Pangburn switchgrass (Panicum virgatum L.)”
e2“tolerated one clipping during the season with little or no reduction in forage production, clonal survival, tiller number per clone, or tiller height”
Claim · model-written summary
One clipping per season caused little or no reduction in switchgrass tiller number per clone or tiller height.
- Taxon
- switchgrassPanicum virgatume1
- Material
- Pangburne1
- Treatment
- one clipping during the seasone2
- Outcome
- tiller number per clone, or tiller heighte2
- Direction
- little or no reductione2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Pangburn switchgrass (Panicum virgatum L.)”
e2“tolerated one clipping during the season with little or no reduction in forage production, clonal survival, tiller number per clone, or tiller height”
Claim · model-written summary
Two or more clippings per season reduced switchgrass forage production and clonal survival.
- Taxon
- switchgrassPanicum virgatume1
- Material
- Pangburne1
- Treatment
- two or more clippings per seasone3
- Outcome
- forage production, clonal survivale2
- Direction
- reducede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Pangburn switchgrass (Panicum virgatum L.)”
e2“tolerated one clipping during the season with little or no reduction in forage production, clonal survival, tiller number per clone, or tiller height”
e3“two or more clippings per season reduced all of the above”
Claim · model-written summary
Two or more clippings per season reduced switchgrass tiller number per clone and tiller height.
- Taxon
- switchgrassPanicum virgatume1
- Material
- Pangburne1
- Treatment
- two or more clippings per seasone3
- Outcome
- tiller number per clone, or tiller heighte2
- Direction
- reducede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Pangburn switchgrass (Panicum virgatum L.)”
e2“tolerated one clipping during the season with little or no reduction in forage production, clonal survival, tiller number per clone, or tiller height”
e3“two or more clippings per season reduced all of the above”
Claim · model-written summary
Over-utilization of switchgrass at the start of the season decreased the number of tillers and clones per plot.
- Taxon
- switchgrassPanicum virgatume4
- Treatment
- Over-utilization of switchgrass at the start of the seasone4
- Outcome
- number of tillers and clones per plote4
- Direction
- decreasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Over-utilization of switchgrass at the start of the season decreased the number of tillers and clones per plot and resulted in a serious weed problem”
Claim · model-written summary
Over-utilization of switchgrass at the start of the season resulted in a serious weed problem.
- Taxon
- switchgrassPanicum virgatume4
- Treatment
- Over-utilization of switchgrass at the start of the seasone4
- Outcome
- serious weed probleme4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Over-utilization of switchgrass at the start of the season decreased the number of tillers and clones per plot and resulted in a serious weed problem”
Claim · model-written summary
Grazing switchgrass before the summer perennials initiate growth could improve the forage program in the South.
- Taxon
- switchgrassPanicum virgatume5
- Treatment
- grazing switchgrass before the summer perennials initiate growthe5
- Outcome
- forage program in the Southe5
- Setting
- the Southe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“it appears that the forage program in the South could be improved significantly by grazing switchgrass before the summer perennials initiate growth”
Claim · model-written summary
Haying at flowering and grazing following frost could utilize switchgrass later in the summer.
- Taxon
- switchgrassPanicum virgatume6
- Treatment
- Haying at flowering and grazing following froste6
- Outcome
- utilize the switchgrass later in the summere6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Haying at flowering and grazing following frost could utilize the switchgrass later in the summer”
The same questions in other papers
climate site · yield · Panicum virgatum (switchgrass)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- no effect
mechanical · yield · Panicum virgatum (switchgrass)Results agree
2 papers in the same direction as this paper
- negative
- negative
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.