Abstract
The objective of this study was to evaluate the performance of two genotypes of elephant grass, fertilized with and without N, for biomass production for energy use under the edaphoclimatic conditions of the Cerrado. The genotypes Roxo and Paraíso, grown in a field experiment in a Latosol in the Cerrado region were evaluated for biomass yield, nitrogen accumulation, C:N and stem:leaf ratios, fibre, ash and P and K contents and calorific value. The accumulated dry biomass ranged from 30 to 42 Mg ha-1 and showed no response to nitrogen fertilization with the lowest biomass obtained by the genotype Paraíso and the highest by Roxo. The total N accumulation followed the same pattern as for dry matter, ranging from 347 to 539 kg N ha-1. C:N and stem:leaf ratio of the biomass produced did not vary with treatments. The fibre contents were higher in genotype Paraíso and the highest levels of ash in the genotype Roxo. The K content in the biomass was higher in genotype Roxo and P did not vary between genotypes. The calorific value averaged 18 MJ kg-1 of dry matter and did not vary with the levels of N in leaves and stems of the plant. Both genotypes, independent of N fertilization, produced over 30 Mg ha-1 of biomass under Cerrado conditions.
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Claims 13
Claim · model-written summary
Accumulated dry biomass of elephant grass ranged from 30 to 42 Mg ha-1.
- Taxon
- elephant grass
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Cenchrus purpureuse0 - Outcome
- accumulated dry biomasse1
- Value
- 30 to 42 Mg ha-1e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“two genotypes of elephant grass, fertilized with and without N”
e1“The accumulated dry biomass ranged from 30 to 42 Mg ha-1”
Claim · model-written summary
Nitrogen fertilization showed no response in accumulated dry biomass of elephant grass.
- Taxon
- elephant grassCenchrus purpureuse0
- Treatment
- nitrogen fertilizatione1
- Outcome
- accumulated dry biomasse1
- Direction
- no responsee1
- Comparator
- without Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two genotypes of elephant grass, fertilized with and without N”
e1“The accumulated dry biomass ranged from 30 to 42 Mg ha-1 and showed no response to nitrogen fertilization”
Claim · model-written summary
The genotype Paraíso had the lowest accumulated biomass of the two elephant grass genotypes.
- Taxon
- elephant grassCenchrus purpureuse0
- Material
- Paraísoe1
- Outcome
- biomasse1
- Direction
- loweste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two genotypes of elephant grass, fertilized with and without N”
e1“with the lowest biomass obtained by the genotype Paraíso and the highest by Roxo”
Claim · model-written summary
The genotype Roxo had the highest accumulated biomass of the two elephant grass genotypes.
- Taxon
- elephant grassCenchrus purpureuse0
- Material
- Roxoe1
- Outcome
- biomasse1
- Direction
- higheste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two genotypes of elephant grass, fertilized with and without N”
e1“with the lowest biomass obtained by the genotype Paraíso and the highest by Roxo”
Claim · model-written summary
Total N accumulation of elephant grass ranged from 347 to 539 kg N ha-1 and followed the same pattern as dry matter.
- Taxon
- elephant grassCenchrus purpureuse0
- Outcome
- total N accumulatione2
- Value
- 347 to 539 kg N ha-1e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two genotypes of elephant grass, fertilized with and without N”
e2“The total N accumulation followed the same pattern as for dry matter, ranging from 347 to 539 kg N ha-1”
Claim · model-written summary
C:N and stem:leaf ratios of the elephant grass biomass did not vary with treatments.
- Taxon
- elephant grassCenchrus purpureuse0
- Outcome
- C:N and stem:leaf ratioe3
- Direction
- did not varye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two genotypes of elephant grass, fertilized with and without N”
e3“C:N and stem:leaf ratio of the biomass produced did not vary with treatments”
Claim · model-written summary
Fibre contents were higher in the genotype Paraíso of elephant grass.
- Taxon
- elephant grassCenchrus purpureuse0
- Material
- genotype Paraísoe4
- Outcome
- fibre contentse4
- Direction
- highere4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two genotypes of elephant grass, fertilized with and without N”
e4“The fibre contents were higher in genotype Paraíso and the highest levels of ash in the genotype Roxo”
Claim · model-written summary
Ash levels were highest in the genotype Roxo of elephant grass.
- Taxon
- elephant grassCenchrus purpureuse0
- Material
- genotype Roxoe4
- Outcome
- ashe4
- Direction
- highest levelse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two genotypes of elephant grass, fertilized with and without N”
e4“The fibre contents were higher in genotype Paraíso and the highest levels of ash in the genotype Roxo”
Claim · model-written summary
K content of elephant grass biomass was higher in the genotype Roxo.
- Taxon
- elephant grassCenchrus purpureuse0
- Material
- genotype Roxoe5
- Outcome
- K contente5
- Direction
- highere5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two genotypes of elephant grass, fertilized with and without N”
e5“The K content in the biomass was higher in genotype Roxo and P did not vary between genotypes”
Claim · model-written summary
P content of elephant grass biomass did not vary between the two genotypes.
- Taxon
- elephant grassCenchrus purpureuse0
- Outcome
- Pe5
- Direction
- did not varye5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two genotypes of elephant grass, fertilized with and without N”
e5“The K content in the biomass was higher in genotype Roxo and P did not vary between genotypes”
Claim · model-written summary
The calorific value of elephant grass biomass averaged 18 MJ kg-1 of dry matter.
- Taxon
- elephant grassCenchrus purpureuse0
- Outcome
- calorific valuee6
- Value
- 18 MJ kg-1 of dry mattere6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two genotypes of elephant grass, fertilized with and without N”
e6“The calorific value averaged 18 MJ kg-1 of dry matter and did not vary with the levels of N in leaves and stems of the plant”
Claim · model-written summary
The calorific value of elephant grass did not vary with the levels of N.
- Taxon
- elephant grassCenchrus purpureuse0
- Treatment
- levels of Ne6
- Outcome
- calorific valuee6
- Direction
- did not varye6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two genotypes of elephant grass, fertilized with and without N”
e6“The calorific value averaged 18 MJ kg-1 of dry matter and did not vary with the levels of N in leaves and stems of the plant”
Claim · model-written summary
Both elephant grass genotypes produced over 30 Mg ha-1 of biomass under Cerrado conditions, independent of N fertilization.
- Taxon
- elephant grassCenchrus purpureuse0
- Material
- Both genotypese7
- Outcome
- biomasse7
- Value
- over 30 Mg ha-1e7
- Qualifier
- independent of N fertilizatione7
- Setting
- Cerrado conditionse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two genotypes of elephant grass, fertilized with and without N”
e7“Both genotypes, independent of N fertilization, produced over 30 Mg ha-1 of biomass under Cerrado conditions”
The same questions in other papers
fertilization · growth · Cenchrus purpureus (elephant grass)Positive and negative results
2 papers in the same direction as this paper · 17 in the opposite direction
- positive
- positive
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See all 20 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.