Abstract
Abstract Crop and forage yields are significantly reduced by strong soil acidity throughout much of the northeastern United States. Switchgrass (Panicum virgatum L.) is a valuable perennial warm‐season pasture species generally regarded as tolerant to stress conditions, i.e., infertile, dry, or low pH soils; however, switchgrass has not been studied for variability in acid soil tolerance. The objectives of this study were (a) to compare the responses of different switchgrass entries to soil acidity, and (b) to identify selected agribotanical trait response to unlimed (‐L) and limed (+L) soil. Sixteen entries (cultivars, germplasms, and breeding populations) were studied in short‐ and meso‐term experiments. Unlimed (pH 4.9) and limed (pH 5.9) treatments of a sandy loam soil (Typic Dystrochrept) were used in both experiments. Switchgrass seedlings were exceptionally tolerant of soil acidity in the short‐term experiment. In the meso‐term experiment, acid soil stress significantly reduced all agribotanical traits (plant height, leaf area, top weight, and root weight) determined in the study when compared to +L plants. There were significant, positive correlations among the agribotanical traits; however, the effect of ‐L soil was more obvious on root weight and less so on plant height. Entries 922 GST6, 920 AST6, 921 DST6, and 922 BST6 showed superior general adaptability and promising forage production, while cultivars Carthage and PI 142138 were acid soil tolerant with low productivity. Our data suggests that selection for increased acid soil tolerance in switchgrass may be possible and would result in improved productivity of this grass in acid soil environments.
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Claims 12
Claim · model-written summary
Switchgrass seedlings showed exceptional acid soil tolerance in the short term.
- Taxon
- Switchgrass
Panicum virgatume0 - Outcome
- tolerant of soil aciditye0
- Qualifier
- short‐term experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Switchgrass seedlings were exceptionally tolerant of soil acidity in the short‐term experiment.”
Claim · model-written summary
Acid soil significantly reduced plant height and leaf area relative to limed plants.
- Treatment
- acid soil stresse0
- Outcome
- plant height, leaf areae0
- Direction
- reducede0
- Qualifier
- meso‐term experimente0
- Comparator
- +L plantse0
Not reportedTaxon
Verbatim
e0“In the meso‐term experiment, acid soil stress significantly reduced all agribotanical traits (plant height, leaf area, top weight, and root weight) determined in the study when compared to +L plants.”
Claim · model-written summary
Acid soil significantly reduced top and root weight relative to limed plants.
- Treatment
- acid soil stresse0
- Outcome
- top weight, and root weighte0
- Direction
- reducede0
- Comparator
- +L plantse0
Not reportedTaxon
Verbatim
e0“In the meso‐term experiment, acid soil stress significantly reduced all agribotanical traits (plant height, leaf area, top weight, and root weight) determined in the study when compared to +L plants.”
Claim · model-written summary
The measured agribotanical traits were significantly positively correlated.
Not reportedTaxonMaterialGeneCompoundOrgan / stageInteractorTreatmentComparatorSetting
Verbatim
e0“There were significant, positive correlations among the agribotanical traits”
Claim · model-written summary
Unlimed soil affected root weight more than plant height.
Not reportedTaxon
Verbatim
e0“the effect of ‐L soil was more obvious on root weight and less so on plant height.”
Claim · model-written summary
Entry 922 GST6 had superior adaptability and promising forage production.
Not reportedTaxon
Verbatim
e0“Entries 922 GST6, 920 AST6, 921 DST6, and 922 BST6 showed superior general adaptability and promising forage production”
Claim · model-written summary
Entry 920 AST6 had superior adaptability and promising forage production.
Not reportedTaxon
Verbatim
e0“Entries 922 GST6, 920 AST6, 921 DST6, and 922 BST6 showed superior general adaptability and promising forage production”
Claim · model-written summary
Entry 921 DST6 had superior adaptability and promising forage production.
Not reportedTaxon
Verbatim
e0“Entries 922 GST6, 920 AST6, 921 DST6, and 922 BST6 showed superior general adaptability and promising forage production”
Claim · model-written summary
Entry 922 BST6 had superior adaptability and promising forage production.
Not reportedTaxon
Verbatim
e0“Entries 922 GST6, 920 AST6, 921 DST6, and 922 BST6 showed superior general adaptability and promising forage production”
Claim · model-written summary
Carthage was acid tolerant but had low productivity.
Not reportedTaxon
Verbatim
e0“cultivars Carthage and PI 142138 were acid soil tolerant with low productivity.”
Claim · model-written summary
PI 142138 was acid tolerant but had low productivity.
Not reportedTaxon
Verbatim
e0“cultivars Carthage and PI 142138 were acid soil tolerant with low productivity.”
Claim · model-written summary
The authors suggest selection for acid tolerance could improve switchgrass productivity in acid soil.
- Taxon
- switchgrassPanicum virgatume0
- Outcome
- selection for increased acid soil tolerancee0
- Qualifier
- improved productivity of this grass in acid soil environmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our data suggests that selection for increased acid soil tolerance in switchgrass may be possible and would result in improved productivity of this grass in acid soil environments.”
The same questions in other papers
ph · growth · 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.