Abstract
Abstract Background and Objectives Field experiments were conducted to assess the influence of in‐season split application of nitrogen (N) on grain protein, protein digestibility, and amino acid dynamics in grain sorghum, in three different environments. Treatments included a zero N check and eight treatments with varying N application timings and amounts. Findings The five high N treatments had significantly greater grain protein content than all the lower N treatments. As the total protein increased, the kafirin portion of the protein increased, whereas the albumin‐globulin levels decreased. Nitrogen treatment had a significant effect on 13 of the 18 amino acids. High N applications significantly increased amino acids on a protein basis including alanine, glutamic acid, leucine, proline, and phenylalanine. Conclusions Treatment N92 with N applied at 92 kg N ha −1 as split application at three different growth stages including planting, panicle initiation, and booting emerged as the optimum N treatment for increasing protein and amino acid concentration in grain sorghum. Significance and Novelty The ideal N application approach identified can be used to screen a wide range of sorghum hybrids under varying levels of irrigation and the same N treatments can be adopted by producers to enhance grain protein in sorghum.
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Claims 7
Claim · model-written summary
High nitrogen treatments significantly increased grain protein over lower nitrogen treatments.
- Treatment
- five high N treatmentse0
- Outcome
- grain protein contente0
- Direction
- greatere0
- Comparator
- all the lower N treatmentse0
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The five high N treatments had significantly greater grain protein content than all the lower N treatments.”
t0“sorghum”
Claim · model-written summary
As total protein increased, the kafirin fraction increased.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As the total protein increased, the kafirin portion of the protein increased”
t0“sorghum”
Claim · model-written summary
As total protein increased, albumin-globulin decreased.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As the total protein increased, the kafirin portion of the protein increased, whereas the albumin‐globulin levels decreased.”
t0“sorghum”
Claim · model-written summary
Nitrogen treatment significantly affected 13 of 18 amino acids.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen treatment had a significant effect on 13 of the 18 amino acids.”
t0“sorghum”
Claim · model-written summary
High nitrogen significantly increased alanine, glutamic acid, and leucine on a protein basis.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High N applications significantly increased amino acids on a protein basis including alanine, glutamic acid, leucine, proline, and phenylalanine.”
t0“sorghum”
Claim · model-written summary
High nitrogen significantly increased proline and phenylalanine on a protein basis.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High N applications significantly increased amino acids on a protein basis including alanine, glutamic acid, leucine, proline, and phenylalanine.”
t0“sorghum”
Claim · model-written summary
N92 split across planting, panicle initiation and booting was the optimum treatment for grain protein and amino acids.
- Taxon
- grain sorghum
Sorghum bicolore0 - Treatment
- N92 with N applied at 92 kg N ha −1 as split application at three different growth stages including planting, panicle initiation, and bootinge0
- Outcome
- protein and amino acid concentratione0
- Direction
- increasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment N92 with N applied at 92 kg N ha −1 as split application at three different growth stages including planting, panicle initiation, and booting emerged as the optimum N treatment for increasing protein and amino acid concentration in grain sorghum.”
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1 paper in the same direction as this paper
- positive
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.