Abstract
Nitrogen is a very important nutrient in grass maintenance fertilization and therefore must be applied at the appropriate moment. The objective of this study was to identify the most responsive moment to nitrogen fertilization and to verify if root mass and the content of carbohydrates and nitrogen in roots influence the moment of fertilization in cultivars of Megathyrsus maximus (syn. Panicum maximum). This study was carried out simultaneously in a greenhouse using a completely randomized design, with sixteen treatments and five replications, in a 4×4 factorial design. The treatments consisted of four intervals between cultivar defoliation and nitrogen fertilization (0, 3, 6 and 9 days) and four Megathyrsus maximus cultivars, Mombasa, BRS Zuri, BRS Quenia and BRS Tamani, which were evaluated in five regrowth cycles. No difference in forage mass was observed among cultivars when fertilization was performed on days zero, three and nine after harvesting. On day nine, Mombasa showed a higher forage mass compared to BRS Tamani. Nitrogen content in the roots of Zuri decreased when fertilization was performed on the third day after defoliation, remaining constant in the other fertilization intervals. A linear reduction in root starch in BRS Zuri was observed, while in Mombasa cultivars, a linear increase was observed when fertilization was performed nine days after harvesting. Thus, nitrogen fertilization of BRS Tamani should be carried out closer to defoliation, while Mombasa, BRS Zuri and BRS Quenia can be fertilized up to nine days after harvesting, which results in greater flexibility regarding the moment of nitrogen fertilization.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Forage mass did not differ among Megathyrsus maximus cultivars when nitrogen was applied on days zero, three and nine after harvesting.
- Taxon
- Megathyrsus maximus
.jpg?width=60)
Megathyrsus maximuse0 - Treatment
- fertilization was performed on days zero, three and nine after harvestinge1
- Outcome
- forage masse1
- Direction
- No differencee1
- Comparator
- among cultivarse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“cultivars of Megathyrsus maximus (syn. Panicum maximum)”
e1“No difference in forage mass was observed among cultivars when fertilization was performed on days zero, three and nine after harvesting”
Claim · model-written summary
On day nine after defoliation, Mombasa had a higher forage mass than BRS Tamani.
- Taxon
- Megathyrsus maximusMegathyrsus maximuse0
- Material
- Mombasae2
- Outcome
- forage masse2
- Direction
- highere2
- Comparator
- BRS Tamanie2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cultivars of Megathyrsus maximus (syn. Panicum maximum)”
e2“On day nine, Mombasa showed a higher forage mass compared to BRS Tamani”
Claim · model-written summary
Nitrogen fertilization on the third day after defoliation decreased nitrogen content in the roots of BRS Zuri.
- Taxon
- Megathyrsus maximusMegathyrsus maximuse0
- Material
- Zurie3
- Organ / stage
- rootse3
- Treatment
- fertilization was performed on the third day after defoliatione3
- Outcome
- Nitrogen contente3
- Direction
- decreasede3
- Comparator
- other fertilization intervalse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cultivars of Megathyrsus maximus (syn. Panicum maximum)”
e3“Nitrogen content in the roots of Zuri decreased when fertilization was performed on the third day after defoliation, remaining constant in the other fertilization intervals”
Claim · model-written summary
Root nitrogen content of BRS Zuri remained constant at the other fertilization intervals compared with the third day after defoliation.
- Taxon
- Megathyrsus maximusMegathyrsus maximuse0
- Material
- Zurie3
- Organ / stage
- rootse3
- Treatment
- other fertilization intervalse3
- Outcome
- Nitrogen contente3
- Direction
- remaining constante3
- Comparator
- third day after defoliatione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cultivars of Megathyrsus maximus (syn. Panicum maximum)”
e3“Nitrogen content in the roots of Zuri decreased when fertilization was performed on the third day after defoliation, remaining constant in the other fertilization intervals”
Claim · model-written summary
Root starch decreased linearly in BRS Zuri.
- Taxon
- Megathyrsus maximusMegathyrsus maximuse0
- Material
- BRS Zurie4
- Organ / stage
- roote4
- Outcome
- root starche4
- Direction
- reductione4
- Qualifier
- lineare4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cultivars of Megathyrsus maximus (syn. Panicum maximum)”
e4“A linear reduction in root starch in BRS Zuri was observed, while in Mombasa cultivars, a linear increase was observed when fertilization was performed nine days after harvesting”
Claim · model-written summary
Root starch of Mombasa increased linearly when nitrogen was applied nine days after harvesting.
- Taxon
- Megathyrsus maximusMegathyrsus maximuse0
- Material
- Mombasae4
- Organ / stage
- roote4
- Treatment
- fertilization was performed nine days after harvestinge4
- Outcome
- root starche4
- Direction
- increasee4
- Qualifier
- lineare4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cultivars of Megathyrsus maximus (syn. Panicum maximum)”
e4“A linear reduction in root starch in BRS Zuri was observed, while in Mombasa cultivars, a linear increase was observed when fertilization was performed nine days after harvesting”
Claim · model-written summary
The authors recommend applying nitrogen to BRS Tamani closer to defoliation.
- Taxon
- Megathyrsus maximusMegathyrsus maximuse0
- Material
- BRS Tamanie5
- Treatment
- nitrogen fertilizatione5
- Outcome
- closer to defoliatione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cultivars of Megathyrsus maximus (syn. Panicum maximum)”
e5“nitrogen fertilization of BRS Tamani should be carried out closer to defoliation”
Claim · model-written summary
The authors recommend that Mombasa, BRS Zuri and BRS Quenia can be fertilized up to nine days after harvesting.
- Taxon
- Megathyrsus maximusMegathyrsus maximuse0
- Material
- Mombasa, BRS Zuri and BRS Queniae6
- Outcome
- fertilized up to nine days after harvestinge6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cultivars of Megathyrsus maximus (syn. Panicum maximum)”
e6“Mombasa, BRS Zuri and BRS Quenia can be fertilized up to nine days after harvesting”
The same questions in other papers
fertilization · nutrient: content · Megathyrsus maximus (Guinea grass)Positive and negative results
8 reporting no difference from an alternative
- positive
- positive
- positive
5 papers more in this group
See all 9 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.