Abstract
<!-- @page { margin: 2cm } P { margin-bottom: 0.21cm } --> The objective of the research was to evaluate the effects of row spacing on agronomic characteristics of three sunflower hybrids. The trial was carried out in Rio Verde, Goiás State, Brazil. The hybrids tested were Agrobel 960, BRHS 5, and Hélio 251, in four row spacing (40 cm, 50 cm, 70 cm, and 80 cm), in a population of 45.000 plants ha-1. The hybrids were planted in March 12, 2005, after bean grown in the summer season, and harvested in July 5. Achene yield and thousand weight, capitulum size, number of achenes per capitulum, and plant height were evaluated. The Agrobel 960 hybrid presented the largest achene yield and the smallest height. The larger yield of Agrobel 960 was attributed to the higher number of achenes per capitulum. The sunflower hybrids did not present significant differences for achene thousand weight and capitulum size. The 40 cm row spacing presented larger achene yield and number of achenes per capitulum. However, it did not influence the achene thousand weight, capitulum size, and plant height. KEY-WORDS: Helianthus annuus; plant arrangement; yield components; double cropping. <!-- @page { margin: 2cm } P { margin-bottom: 0.21cm } --> Com o objetivo de avaliar o efeito do espaçamento entre linhas, nas características agronômicas de três híbridos de girassol, foi conduzido um ensaio em Rio Verde (GO). Utilizaram-se os híbridos Agrobel 960, BRHS 5 e Hélio 251, cultivados nos espaçamentos de 40 cm, 50 cm, 70 cm e 80 cm entre linhas, com população estável de 45.000 plantas ha-1, após cultivo de feijão na safra de verão. A semeadura foi realizada em 12 de março e a colheita em 5 de julho de 2005. Avaliaram-se a produtividade e o peso de 1.000 aquênios, o diâmetro do capítulo, o número de aquênios por capítulo e a altura de plantas. Os resultados obtidos permitiram concluir que o híbrido de girassol Agrobel 960 apresentou maior produtividade, mesmo sendo o de menor porte. Tal produtividade foi atribuída ao maior número de aquênios por capítulo. Os híbridos de girassol não diferiram, quanto ao peso de 1.000 aquênios e diâmetro do capítulo. O espaçamento de 40 cm entre linhas apresentou a maior produtividade e número de aquênios por capítulo, não influenciando o peso de 1.000 aquênios, o diâmetro do capítulo e a altura de plantas de girassol. PALAVRAS-CHAVE: Helianthus annuus; arranjo de plantas; componentes da produção; safrinha.
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Claims 6
Claim · model-written summary
Agrobel 960 had the largest achene yield.
- Taxon
- SUNFLOWER
Helianthus annuust0 - Material
- Agrobel 960e0
- Outcome
- achene yielde0
- Direction
- largeste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Agrobel 960 hybrid presented the largest achene yield and the smallest height.”
t0“SUNFLOWER HYBRIDS”
Claim · model-written summary
Agrobel 960 had the smallest plant height.
- Taxon
- SUNFLOWERHelianthus annuust0
- Material
- Agrobel 960e0
- Outcome
- heighte0
- Direction
- smalleste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Agrobel 960 hybrid presented the largest achene yield and the smallest height.”
t0“SUNFLOWER HYBRIDS”
Claim · model-written summary
The authors attributed Agrobel 960 yield to more achenes per capitulum.
- Taxon
- SUNFLOWERHelianthus annuust0
- Material
- Agrobel 960e0
- Outcome
- larger yielde0
- Qualifier
- higher number of achenes per capitulume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The larger yield of Agrobel 960 was attributed to the higher number of achenes per capitulum.”
t0“SUNFLOWER HYBRIDS”
Claim · model-written summary
Hybrids showed no significant differences in achene thousand weight or capitulum size.
- Taxon
- sunflowerHelianthus annuuse0
- Outcome
- achene thousand weight and capitulum sizee0
- Direction
- did not present significant differencese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sunflower hybrids did not present significant differences for achene thousand weight and capitulum size.”
Claim · model-written summary
Forty centimeter spacing produced larger achene yield and more achenes per capitulum.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- 40 cm row spacinge0
- Outcome
- achene yield and number of achenes per capitulume0
- Direction
- largere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 40 cm row spacing presented larger achene yield and number of achenes per capitulum.”
t0“SUNFLOWER HYBRIDS”
Claim · model-written summary
Row spacing did not influence achene weight, capitulum size or plant height.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- 40 cm row spacinge1
- Outcome
- achene thousand weight, capitulum size, and plant heighte0
- Direction
- did not influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it did not influence the achene thousand weight, capitulum size, and plant height”
t0“SUNFLOWER HYBRIDS”
e1“The 40 cm row spacing presented larger achene yield and number of achenes per capitulum.”
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