Abstract
Total ß-carotene content of four varieties of Sweet potatoes [Ipomoea batatas (L) Lam] as influenced by different levels of nitrogen fertilizer were determined by High Performance Liquid Chromatography (HPLC) The proximate composition and mineral contents were also determined. The nitrogen fertilizer treatments were combinations of four levels of 0kgN/ha(control), 40 kgN/ha, 80 kg/Nha, 120 kgN/ha on the four varieties of Sweet potato; white-fleshed TIS87/0087 and TIS8164, orange-fleshed Ex-Igbariam and CIP Tanzania. Nitrogen fertilizer significantly (p<0.05) increased the total ß-carotene and crude protein with increase in nitrogen fertilizer application up to 120 kgN/ha. Generally there was a trend in the total ß-carotene increase from 0-80 kgN/ha for all the varieties except CIP Tanzania which showed no such trend. On the average, TIS87/0087 and Ex-Igbariam varieties gave the highest total ß-carotene content at 40-80 kgN/ha when compared with the control. The highest yield for the crude fiber was observed at the control (0 kgN/ha) for all the varieties except TIS8164 which highest value was observed at 40 kgN/ha. Application of nitrogen above 80 kgN/ha did not increase the yield of most nutrient (namely, ß-carotene and protein). Generally, application of nitrogen fertilizer increased the mineral contents of most Sweet potato varieties significantly (p<0.05) from 0-120 kgN/ha with the exception of phosphorus which showed significant decrease. The overall results indicate increased bioavailability of ß-carotene (Provitamin A) and crude protein for good nutrition and health particularly at 40-80 kgN/ha.
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Claims 10
Claim · model-written summary
Nitrogen fertilizer significantly increased total beta-carotene up to 120 kgN/ha.
- Taxon
- Sweet Potato
_Flower.jpg?width=60)
Ipomoea batatast0 - Treatment
- Nitrogen fertilizere0
- Outcome
- total ß-carotenee0
- Direction
- increasede0
- Qualifier
- up to 120 kgN/hae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
t0“Sweet Potato”
e0“Nitrogen fertilizer significantly (p<0.05) increased the total ß-carotene and crude protein with increase in nitrogen fertilizer application up to 120 kgN/ha”
Claim · model-written summary
Nitrogen fertilizer significantly increased crude protein up to 120 kgN/ha.
- Taxon
- Sweet PotatoIpomoea batatast0
- Treatment
- Nitrogen fertilizere0
- Outcome
- crude proteine0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sweet Potato”
e0“Nitrogen fertilizer significantly (p<0.05) increased the total ß-carotene and crude protein with increase in nitrogen fertilizer application up to 120 kgN/ha”
Claim · model-written summary
Beta-carotene rose from 0 to 80 kgN/ha in all varieties except CIP Tanzania.
- Taxon
- Sweet PotatoIpomoea batatast0
- Outcome
- total ß-carotenee0
- Direction
- increasee0
- Qualifier
- except CIP Tanzaniae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sweet Potato”
e0“there was a trend in the total ß-carotene increase from 0-80 kgN/ha for all the varieties except CIP Tanzania which showed no such trend”
Claim · model-written summary
TIS87/0087 had highest beta-carotene at 40-80 kgN/ha versus control.
- Taxon
- Sweet PotatoIpomoea batatast0
- Material
- TIS87/0087e0
- Treatment
- 40-80 kgN/hae0
- Outcome
- total ß-carotene contente0
- Direction
- higheste0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sweet Potato”
e0“TIS87/0087 and Ex-Igbariam varieties gave the highest total ß-carotene content at 40-80 kgN/ha when compared with the control”
Claim · model-written summary
Ex-Igbariam had highest beta-carotene at 40-80 kgN/ha versus control.
- Taxon
- Sweet PotatoIpomoea batatast0
- Material
- Ex-Igbariame0
- Treatment
- 40-80 kgN/hae0
- Outcome
- total ß-carotene contente0
- Direction
- higheste0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sweet Potato”
e0“TIS87/0087 and Ex-Igbariam varieties gave the highest total ß-carotene content at 40-80 kgN/ha when compared with the control”
Claim · model-written summary
Crude fiber was highest without fertilizer for varieties other than TIS8164.
- Taxon
- Sweet PotatoIpomoea batatast0
- Treatment
- 0 kgN/hae0
- Outcome
- crude fibere0
- Direction
- higheste0
- Qualifier
- except TIS8164e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sweet Potato”
e0“The highest yield for the crude fiber was observed at the control (0 kgN/ha) for all the varieties except TIS8164”
Claim · model-written summary
TIS8164 crude fiber was highest at 40 kgN/ha.
- Taxon
- Sweet PotatoIpomoea batatast0
- Material
- TIS8164e0
- Treatment
- 40 kgN/hae0
- Outcome
- highest valuee0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sweet Potato”
e0“TIS8164 which highest value was observed at 40 kgN/ha”
Claim · model-written summary
Above 80 kgN/ha did not increase beta-carotene and protein for most nutrients.
- Taxon
- Sweet PotatoIpomoea batatast0
- Treatment
- nitrogen above 80 kgN/hae0
- Outcome
- ß-carotene and proteine0
- Direction
- did not increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sweet Potato”
e0“Application of nitrogen above 80 kgN/ha did not increase the yield of most nutrient (namely, ß-carotene and protein)”
Claim · model-written summary
Nitrogen fertilizer significantly increased most mineral contents.
- Taxon
- Sweet potatoIpomoea batatase0
- Treatment
- nitrogen fertilizere0
- Outcome
- mineral contentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sweet Potato”
e0“application of nitrogen fertilizer increased the mineral contents of most Sweet potato varieties significantly (p<0.05) from 0-120 kgN/ha”
Claim · model-written summary
Phosphorus content decreased significantly with fertilizer.
- Taxon
- Sweet PotatoIpomoea batatast0
- Outcome
- phosphoruse0
- Direction
- decreasee0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sweet Potato”
e0“with the exception of phosphorus which showed significant decrease”
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