Yield and growth characteristics of sunflower sown from August to February in Santa Maria, RS

Heldwein, Arno Bernardo; Loose, Luís Henrique; Lucas, Dionéia Daiane Pitol; Hinnah, Fernando Dill; Bortoluzzi, Mateus Possebon; Maldaner, Ivan Carlos

doi:10.1590/1807-1929/agriambi.v18n09p908-913

Cited by 5 publications

(3 citation statements)

References 16 publications

(24 reference statements)

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“…The trade patterns for cut sunflower requires a stem diameter with a minimum of 8.0 mm for 50, 60 and 70 cm lengths and a minimum of 11.0 mm for stems whose size varies from 80.0 to 90.0 cm (Ibraflor, 2016). It is desirable the correlation between stem diameter and plant high to support the inflorescence, mainly when the diameter of the capitulum are larger (Heldwein et al, 2014). The significant linear relationship between plant height and stem diameter provide good evidence that taller plants would require thicker stems to keep plants safely in the field (Hassan et al, 2005).…”

Section: Growth and Flowering Evaluationmentioning

confidence: 99%

Growth of ornamental sunflowers in two growing seasons under semiarid conditions

2018

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Sunflower is considered a temperate zone crop but it can perform well under varying climate conditions. In this context, the aim of this study was to evaluate the growth of ornamental sunflower cultivars for cutting in two growing seasons in semiarid conditions. Sunflowers cultivars were sown in a randomized complete design in a split plot system, with four blocks. Six cultivars were evaluated (‘Bonito de outono sortido’, ‘Sol noturno’, ‘Sol vermelho’, ‘Jardim amarelo alto’, ‘Sunflower F1 sunbright supreme’ and ‘Sunflower F1 vincents choice’) in the main plots and two growing seasons in the subplots (GS1 – hot weather and GS2 – mild weather). Plant emergence percentage, plant height, stem diameter, number of leaves and internal inflorescence diameter were significant affected both by sunflowers cultivars and growing seasons. Emergence speed index and external inflorescence diameter were significantly affected by the interaction of cultivars and growing seasons. The obtained results indicated ‘Sol vermelho’ for cultivation in growing seasons with mild temperatures (GS2) and 'Sunflower F1 vincents choice' recommended for both growing seasons with mild climatic (GS2) and in warmer conditions (GS1). Although all other cultivars studied have not been indicated immediately, they may be considered for cultivation, but more studies are necessary for better acclimatization.

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Section: Growth and Flowering Evaluationmentioning

confidence: 99%

Growth of ornamental sunflowers in two growing seasons under semiarid conditions

2018

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“…Head size can be considered an indicator of the plant development, as well as the achene yield, even in situations of environmental stress [8]. Heldwein et al [20] reported that both head size and 1000-achene mass have a direct implication on the achene yield. In the present study, the hybrids AGUARÁ 06 (16.6 cm), AGUARÁ 04 (16.0 cm), HELIO 251 (15.7 cm) and MG 305 (15.6 cm) showed the highest means for head size (Tables 1 and 2).…”

Section: Other Agronomic Traitsmentioning

confidence: 99%

Agronomic Performance of Sunflower Hybrids in Brazilian Savannah Region

Dalchiavon

Birck

Stasiak

et al. 2018

JEAI

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The establishment of sunflower crop in the Brazilian savannah region depends, among other factors, on the use of cultivars with adaptation to the growing regions and adequate characteristics, such as drought tolerance and resistance to main diseases and early cycle. The objective of this work was to evaluate the agronomic performance of sunflower cultivars sown in the second summer crop in Campo Novo do Parecis (Mato Grosso), the main sunflower producing region in the Brazilian savannah, in 2014 and 2015. The experimental design was a randomised complete block with eight treatments (AGUARÁ 04,

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“…Sunflower yield is highly correlated to water conditions in the soil. Different water deficit or water surplus intensity depends on location, rainfall regime and weather conditions in the sowing date (Heldwein et al, 2014). Extreme natural events influencing water availability reduce yield, and may affect oil content and fatty acid profile (Flagella et al, 2002;Sezen et al, 2011;Yasumoto et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Yield and quality of sunflower oil in Ultisol and Oxisol under water regimes

Loose

Heldwein

Silva

et al. 2019

Rev. bras. eng. agríc. ambient.

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Extreme natural events influencing soil water availability are major factors limiting yield and oil quality in oilseed crops. The aim of the present study was to assess the effect of water deficit and surplus water on yield, oil content and on the fatty acid profile of sunflower plants sown in main and second crop seasons in two soil classes in Rio Grande do Sul State. The experiment was carried out in Santa Maria, RS (Ultisol) and Panambi, RS state, Brazil (Oxisol), Brazil, and comprised three water conditions (water deficit, water surplus and control) in a randomized block design. The hybrid Helio 250 was sown in early September (main crop season) and in early January (second crop season) in both soil classes. Yield, yield components, oil content, oil yield and fatty acid profile were herein analyzed. Yield and yield components were affected by water conditions, sowing dates and soil class. The soil class had no significant effect on oil content, yield or quality. Water deficit was more harmful to oil yield and quality than water surplus. Water deficit was responsible for increased oleic fatty acid contents and for linoleic content reduction.

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Yield and growth characteristics of sunflower sown from August to February in Santa Maria, RS

Cited by 5 publications

References 16 publications

Growth of ornamental sunflowers in two growing seasons under semiarid conditions

Growth of ornamental sunflowers in two growing seasons under semiarid conditions

Agronomic Performance of Sunflower Hybrids in Brazilian Savannah Region

Yield and quality of sunflower oil in Ultisol and Oxisol under water regimes

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