Abstract
Forage sorghum (FS) (Sorghum bicolor (L.) Moench) is a warm-season biomass crop used as forage for hay or silage with the potential to become a bioenergy feedstock or for dual-purpose (forage and energy). The objective of this study was to screen potential forage sorghum genotypes for increased chilling tolerance and biomass productivity. Seventy-one genotypes of FS were first ranked for high to low vigor index under controlled conditions at 24, 12, and 10 °C. Field experiments were also conducted on a subset of 12 genotypes in Fargo and Hickson, ND, USA, in 2017 and 2018, using two different seeding dates: early (10 May) and late (27 May). Field emergence index values were greater for the late-seeding compared with the early seeding date. Under field conditions, seed mortality and biomass yield were affected by the seeding date and biomass yield correlated with emergence index and normalized vegetative index. Chemical composition of forage sorghum biomass was not affected by the seeding dates. The results of this study suggest that some forage sorghum genotypes carry genetic traits for increased chilling tolerance and produce greater biomass yield when seeded earlier than normal, which could allow for breeding chilling tolerance into forage sorghum.
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Claims 7
Claim · model-written summary
Late seeding gave a greater field emergence index than early seeding.
Verbatim
e0“Field emergence index values were greater for the late-seeding compared with the early seeding date.”
e1“Forage sorghum (FS) (Sorghum bicolor (L.) Moench)”
Claim · model-written summary
Seeding date affected seed mortality in field conditions, with direction unspecified.
Not reportedDirection
Verbatim
e0“Under field conditions, seed mortality and biomass yield were affected by the seeding date”
e1“Forage sorghum (FS) (Sorghum bicolor (L.) Moench)”
Claim · model-written summary
Seeding date affected biomass yield in field conditions, with direction unspecified.
Not reportedDirection
Verbatim
e0“Under field conditions, seed mortality and biomass yield were affected by the seeding date”
e1“Forage sorghum (FS) (Sorghum bicolor (L.) Moench)”
Claim · model-written summary
Biomass yield correlated with emergence index.
Not reportedDirection
Verbatim
e0“biomass yield correlated with emergence index and normalized vegetative index”
e1“Forage sorghum (FS) (Sorghum bicolor (L.) Moench)”
Claim · model-written summary
Biomass yield correlated with normalized vegetative index.
Not reportedDirection
Verbatim
e0“biomass yield correlated with emergence index and normalized vegetative index”
e1“Forage sorghum (FS) (Sorghum bicolor (L.) Moench)”
Claim · model-written summary
Seeding dates did not affect forage sorghum biomass chemical composition.
- Taxon
- forage sorghume0
- Treatment
- seeding datese0
- Outcome
- Chemical composition of forage sorghum biomasse0
- Direction
- not affectede0
Not reportedComparator
Verbatim
e0“Chemical composition of forage sorghum biomass was not affected by the seeding dates.”
Claim · model-written summary
Some genotypes were interpreted to have greater chilling tolerance and biomass yield with earlier seeding.
Verbatim
e0“some forage sorghum genotypes carry genetic traits for increased chilling tolerance and produce greater biomass yield when seeded earlier than normal”
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