Abstract
BACKGROUND: The weakest link in the whole cycle of chemical quality testing of sweet potato tubers for both food and feed purposes, where the main determinant of their nutritional value is the level of protein and its nutritional value, is the effect of nitrogen fertilization. Therefore, the aim of the study was to determine the effect of differentiated nitrogen fertilization on protein content and its amino acid composition, biological value, and the possibility of modification of these features. RESULTS: Changes in total nitrogen content in sweet potato tubers were accompanied by changes in amino acid composition of protein. The consequence of intensified nitrogen fertilization was a decrease in the sum of exogenous amino acids and sum of endogenous amino acids. The amino acid limiting the biological value of sweet potato protein was mainly lysine, followed by arginine and methionine. The ratio of essential to total amino acids indicated high usefulness of sweet potato tubers in human nutrition and their high nutritional value. CONCLUSION: , due to the content of crude and true protein, turned out to be beneficial and sufficient under the conditions in central-eastern Europe. © 2020 Society of Chemical Industry.
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Claims 6
Claim · model-written summary
Total nitrogen changes in tubers accompanied amino acid composition changes.
- Taxon
- sweet potato
_Flower.jpg?width=60)
Ipomoea batatase0 - Organ / stage
- tuberse0
- Outcome
- amino acid composition of proteine0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“Changes in total nitrogen content in sweet potato tubers were accompanied by changes in amino acid composition of protein”
Claim · model-written summary
Intensified nitrogen fertilization decreased the sum of exogenous amino acids.
- Taxon
- sweet potatoIpomoea batatast0
- Treatment
- intensified nitrogen fertilizatione0
- Outcome
- sum of exogenous amino acidse0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The consequence of intensified nitrogen fertilization was a decrease in the sum of exogenous amino acids and sum of endogenous amino acids”
t0“sweet potato tubers”
Claim · model-written summary
Intensified nitrogen fertilization decreased the sum of endogenous amino acids.
- Taxon
- sweet potatoIpomoea batatast0
- Treatment
- intensified nitrogen fertilizatione0
- Outcome
- sum of endogenous amino acidse0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The consequence of intensified nitrogen fertilization was a decrease in the sum of exogenous amino acids and sum of endogenous amino acids”
t0“sweet potato tubers”
Claim · model-written summary
Lysine was the principal amino acid limiting sweet potato protein value.
- Taxon
- sweet potatoIpomoea batatase0
- Outcome
- biological value of sweet potato proteine0
- Qualifier
- mainly lysinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amino acid limiting the biological value of sweet potato protein was mainly lysine, followed by arginine and methionine”
Claim · model-written summary
Arginine and methionine also limited sweet potato protein value.
- Taxon
- sweet potatoIpomoea batatase0
- Outcome
- biological value of sweet potato proteine0
- Qualifier
- arginine and methioninee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amino acid limiting the biological value of sweet potato protein was mainly lysine, followed by arginine and methionine”
Claim · model-written summary
The essential-to-total amino acid ratio indicated high tuber nutritional value.
- Taxon
- sweet potatoIpomoea batatase0
- Organ / stage
- tuberse0
- Outcome
- high nutritional valuee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ratio of essential to total amino acids indicated high usefulness of sweet potato tubers in human nutrition and their high nutritional value”
The same questions in other papers
fertilization · molecular: metabolites · Ipomoea batatas (sweet potato)Positive and negative results
1 paper in the same direction as this paper · 10 in the opposite direction
- positive
- positive
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See all 12 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.