Abstract
The sunflower is an oilseed species, rustic, cultivated in different agroecosystems. The responses of cultivars to nitrogen fertilization vary according to the cultivar and environment. Therefore, this research aimed to evaluate the response of biometric characters of sunflower cv. Embrapa 122-V2000 under N doses. The experiment was carried out in a randomized block design with five treatments (0, 40, 80, 120 and 160 kg N ha-1) and four blocks. All characters were influenced (p<0.05) by N doses, fitting to the quadratic model. The maximum values of plant height (1.68 m), stem diameter (22.71 mm), leaf area (423.41 cm2), capitulum diameter (15.22 cm), dry biomass yield (6,075.13 kg DM ha-1) and grains (2,982.89 kg ha-1), N use efficiency from biomass (80.3 kg kg-1) and grains (43.27 kg kg-1) close to 90 kg N ha-1, this dose being recommended for the edaphoclimatic conditions of the Agreste Meridional Region of Pernambuco, Brazil.
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Claims 10
Claim · model-written summary
Nitrogen doses influenced all measured characters with quadratic fits.
- Taxon
- sunflower
Helianthus annuust0 - Treatment
- N dosese0
- Outcome
- All characterse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All characters were influenced (p<0.05) by N doses, fitting to the quadratic model”
t0“Sunflower response to nitrogen doses”
Claim · model-written summary
plant height reached a maximum near 90 kg N ha-1.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- 90 kg N ha-1e0
- Outcome
- plant heighte0
- Direction
- maximume0
- Value
- 1.68 me0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum values of plant height (1.68 m), stem diameter (22.71 mm), leaf area (423.41 cm2), capitulum diameter (15.22 cm), dry biomass yield (6,075.13 kg DM ha-1) and grains (2,982.89 kg ha-1), N use efficiency from biomass (80.3 kg kg-1) and grains (43.27 kg kg-1) close to 90 kg N ha-1”
t0“Sunflower response to nitrogen doses”
Claim · model-written summary
stem diameter reached a maximum near 90 kg N ha-1.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- 90 kg N ha-1e0
- Outcome
- stem diametere0
- Direction
- maximume0
- Value
- 22.71 mme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum values of plant height (1.68 m), stem diameter (22.71 mm), leaf area (423.41 cm2), capitulum diameter (15.22 cm), dry biomass yield (6,075.13 kg DM ha-1) and grains (2,982.89 kg ha-1), N use efficiency from biomass (80.3 kg kg-1) and grains (43.27 kg kg-1) close to 90 kg N ha-1”
t0“Sunflower response to nitrogen doses”
Claim · model-written summary
leaf area reached a maximum near 90 kg N ha-1.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- 90 kg N ha-1e0
- Outcome
- leaf areae0
- Direction
- maximume0
- Value
- 423.41 cm2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum values of plant height (1.68 m), stem diameter (22.71 mm), leaf area (423.41 cm2), capitulum diameter (15.22 cm), dry biomass yield (6,075.13 kg DM ha-1) and grains (2,982.89 kg ha-1), N use efficiency from biomass (80.3 kg kg-1) and grains (43.27 kg kg-1) close to 90 kg N ha-1”
t0“Sunflower response to nitrogen doses”
Claim · model-written summary
capitulum diameter reached a maximum near 90 kg N ha-1.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- 90 kg N ha-1e0
- Outcome
- capitulum diametere0
- Direction
- maximume0
- Value
- 15.22 cme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum values of plant height (1.68 m), stem diameter (22.71 mm), leaf area (423.41 cm2), capitulum diameter (15.22 cm), dry biomass yield (6,075.13 kg DM ha-1) and grains (2,982.89 kg ha-1), N use efficiency from biomass (80.3 kg kg-1) and grains (43.27 kg kg-1) close to 90 kg N ha-1”
t0“Sunflower response to nitrogen doses”
Claim · model-written summary
dry biomass yield reached a maximum near 90 kg N ha-1.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- 90 kg N ha-1e0
- Outcome
- dry biomass yielde0
- Direction
- maximume0
- Value
- 6,075.13 kg DM ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum values of plant height (1.68 m), stem diameter (22.71 mm), leaf area (423.41 cm2), capitulum diameter (15.22 cm), dry biomass yield (6,075.13 kg DM ha-1) and grains (2,982.89 kg ha-1), N use efficiency from biomass (80.3 kg kg-1) and grains (43.27 kg kg-1) close to 90 kg N ha-1”
t0“Sunflower response to nitrogen doses”
Claim · model-written summary
grains reached a maximum near 90 kg N ha-1.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- 90 kg N ha-1e0
- Outcome
- grainse0
- Direction
- maximume0
- Value
- 2,982.89 kg ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum values of plant height (1.68 m), stem diameter (22.71 mm), leaf area (423.41 cm2), capitulum diameter (15.22 cm), dry biomass yield (6,075.13 kg DM ha-1) and grains (2,982.89 kg ha-1), N use efficiency from biomass (80.3 kg kg-1) and grains (43.27 kg kg-1) close to 90 kg N ha-1”
t0“Sunflower response to nitrogen doses”
Claim · model-written summary
N use efficiency from biomass reached a maximum near 90 kg N ha-1.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- 90 kg N ha-1e0
- Outcome
- N use efficiency from biomasse0
- Direction
- maximume0
- Value
- 80.3 kg kg-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum values of plant height (1.68 m), stem diameter (22.71 mm), leaf area (423.41 cm2), capitulum diameter (15.22 cm), dry biomass yield (6,075.13 kg DM ha-1) and grains (2,982.89 kg ha-1), N use efficiency from biomass (80.3 kg kg-1) and grains (43.27 kg kg-1) close to 90 kg N ha-1”
t0“Sunflower response to nitrogen doses”
Claim · model-written summary
grains reached a maximum near 90 kg N ha-1.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- 90 kg N ha-1e0
- Outcome
- grainse0
- Direction
- maximume0
- Value
- 43.27 kg kg-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum values of plant height (1.68 m), stem diameter (22.71 mm), leaf area (423.41 cm2), capitulum diameter (15.22 cm), dry biomass yield (6,075.13 kg DM ha-1) and grains (2,982.89 kg ha-1), N use efficiency from biomass (80.3 kg kg-1) and grains (43.27 kg kg-1) close to 90 kg N ha-1”
t0“Sunflower response to nitrogen doses”
Claim · model-written summary
The authors recommend approximately 90 kg N ha-1 for the stated region.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- this dose being recommendede0
- Setting
- Agreste Meridional Region of Pernambuco, Brazile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this dose being recommended for the edaphoclimatic conditions of the Agreste Meridional Region of Pernambuco, Brazil”
t0“Sunflower response to nitrogen doses”