Efeito de épocas de semeadura de girassol na safrinha, em sucessão à soja no Cerrado Tocantinense

Capone, Aristoteles; Barros, Hélio Bandeira; Santos, Elonha Rodrigues dos; Castro, Emerson Ferraz de; Santos, Adão Felipe dos; Fidélis, Rodrigo Ribeiro

doi:10.1590/s0034-737x2012000100015

Cited by 5 publications

(6 citation statements)

References 8 publications

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“…As a rule, late periods seem to present capitulum averaging 10% smaller, with 9% less achenes per capitulum. The above corroborates data given by Capone et al (2012) who related this fact to rainfall decrease.…”

Section: Resultssupporting

confidence: 92%

“…As reported by Backes et al (2008), Cadorin et al (2012), Capone et al (2012) and Thomaz et al (2012) and regardless of the cultivation region, a decrease in PA occurred with the delay of sunflower seed sowing. Consequently, the difference between the first and fourth periods was 405.64 kg ha -1 (Table 7) or rather, the first period produced 37.19% more achenes than during the fourth one.…”

Section: Resultssupporting

confidence: 74%

“…Cultivars SYN 3950HO and HELIO 251 in the first period, Aguará 04 in the third period and MG 305 in the fourth period also had high MA, whereas cultivars Aguará 06, CF 101, SYN 3950HO, GNZ NEON and HELIO 251 failed to show any changes of rates during the different periods of seed sowing. General average for the variable was 37.15 g, which was higher than that reported by Capone et al (2012), or rather, 34.62 g, in their work with five succession cultivars to soybean in the state of Tocantins, Brazil, and lower than the average 52.03 g obtained by Silva et al (2011) capitulum, whereas cultivars CF 101, SYN 3950HO and SYN 045 produced the smallest. Since cultivars SYN 045 and GNZ NEON had the biggest PA and their LC was below the general average of the cultivars (15.83 cm), LC has no direct relationship with PA (Table 6), against Heldwein et al (2014).…”

Section: Resultscontrasting

confidence: 57%

“…Although a short height may decrease loss in the harvest, it may enhance cultivation features during the vegetative development. Since decrease in height did not occur gradually as the seed sowing period progressed, this fact disagreed with that reported by Capone et al (2012) when they analyzed seed sowing periods in the state of Tocantin, Brazil, between March and May. There was no co-relationship between PH and PP, confirmed by Backes et al (2008) in their research on the adaptation of sunflower cultivars seeded during two periods of the second harvest in the northern plateau of the state of Santa Catarina, Brazil.…”

Section: Resultsmentioning

confidence: 72%

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Performance of sunflower cultivars at different seeding periods in central Brazil

et al. 2017

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Sunflower (Helianthus annuus L.) is a very important crop for Brazil, and especially for Chapada do Parecis which is the largest domestic producer, because of its climate and soil conditions are adequate to the development of the specie. The performance of cultivars and sunflower seed sowing periods were evaluated in Central Brazil. Experimental design comprised an 8 x 5 factorial randomized complete block, with eight sunflower cultivars (Aguará 06, Aguará 04, MG 305, CF 101, SYN 3950HO, SYN 045, GNZ NEON and HELIO 251) and five decennial seeding periods, with three replicates. Analysis of variance and Scott-Knott´s test (p<0.05) were applied. Cultivars GNZ NEON and SYN 045 provide the highest production rates in achenes, with higher value in favor of GNZ NEON. SYN 3950HO (this with higher value), CF101, MG 305, SYN 045 and Aguará 04 gets the highest oil rates in the achenes, with SYN 045, GNZ NEON, Aguará 04, CF101 and SYN 3950HO with the highest oil production. The first seed sowing period is the most productive and the first and fifth periods have the best results for oil productivity. Cultivar GNZ NEON and the first period exceede the others with regard to vegetative and reproductive variables.Index terms: Agronomic characteristics; varietal performance; planting date; Helianthus annuus; plant productivity. RESUMOO girassol (Helianthus annuus L.) é uma cultura de grande importância para o Brasil, e especialmente para Chapada do Parecis, que é o maior produtor nacional, em virtude das suas condições edafoclimáticas serem propicias ao desenvolvimento da espécie. Objetivou-se avaliar o desempenho de cultivares e épocas de semeadura do girassol no Brasil Central. O delineamento experimental utilizado foi o de blocos casualizados, em esquema fatorial 8 x 5, sendo oito cultivares de girassol (Aguará 06, Aguará 04, MG 305, CF 101, SYN 3950HO, SYN 045, NEON e HELIO 251) e cinco épocas decendiais de semeadura, com três repetições. Aplicou-se análise de variância e teste Scott-Knott (p<0,05). As cultivares GNZ NEON e SYN 045 proporcionaram maiores produtividades de aquênios, com valor superior em favor da GNZ NEON. A SYN 3950HO (esta com valor superior), CF101, MG 305, SYN 045 e Aguará 04, obtiveram os maiores teores de óleo nos aquênios. A 1ª época de semeadura foi a mais produtiva, assim como a 1ª e a 5ª épocas apresentaram os melhores resultados para produtividade de óleo. A cultivar GNZ NEON e a 1ª época foram as que se destacaram das demais, tanto para as variáveis vegetativas como para as reprodutivas.Termos para indexação: Características agronômicas; desempenho varietal; períodos de plantio; Helianthus annuus; produtividade vegetal.

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Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 74%

Section: Resultscontrasting

confidence: 57%

Section: Resultsmentioning

confidence: 72%

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Performance of sunflower cultivars at different seeding periods in central Brazil

et al. 2017

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“…Backes et al (2008) studied sunflower genotypes at different sowing times and found average initial flowering at 61.5 days for the hybrids H250, H251, H358 and H360, in the State of Santa Catarina. On the other hand, Capone et al (2012) found average initial flowering at 54.1 days. According to Castro and Farias (2005), low temperatures, low luminosity and high humidity prolong the crop cycle, delaying flowering and physiological maturation.…”

Section: Resultsmentioning

confidence: 93%

Morphophysiological and Productive Responses of Sunflower Varieties to Irrigation

et al. 2018

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The high luminosity rates and high annual average temperatures of the Brazilian semiarid region, combined with the use of irrigation and adaptability of the sunflower crop to local climate, favor increased achene yield due to acceleration of morphophysiological processes. The objective of this work was to evaluate the morphophysiological and productive characteristics of sunflower varieties grown under drip irrigation in the Sub-Mid São Francisco River Valley. The experiment was conducted in the Experimental Field of the Brazilian Agricultural Research Corporation (Embrapa Semiarid), in Petrolina, State of Pernambuco, Brazil, in a randomized block design, with 21 sunflower varieties and four replications. The variables evaluated were flowering time, plant height, number of live leaves, stem and capitulum diameter, number of lodged and broken plants, stem curvature, relative chlorophyll index, photosynthesis, stomatal conductance, transpiration, average leaf temperature, 1000-achene weight and achene yield of the sunflower varieties. The treatments presented flowering time of 43 to 59 days after sowing, plant height of 1.0 to 1.4 m, capitulum diameter of 0.154 to 0.221 m, chlorophyll content of 30.8 to 33.98 Spad units and 1000-achene weight of 35.61 to 80.30 g. The sunflower varieties V7 and V8 stood out, with achene yields above 2,960 kg ha-1 and low number of lodged and broken plants, indicating a greater adaptability irrigation crops in the Sub-Mid São Francisco River Valley.

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Silicon Application Increases Biomass Yield in Sunflower by Improving the Photosynthesizing Leaf Area

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Efeito de épocas de semeadura de girassol na safrinha, em sucessão à soja no Cerrado Tocantinense

Abstract: ABSTRACT

Cited by 5 publications

References 8 publications

Performance of sunflower cultivars at different seeding periods in central Brazil

Performance of sunflower cultivars at different seeding periods in central Brazil

Morphophysiological and Productive Responses of Sunflower Varieties to Irrigation

Silicon Application Increases Biomass Yield in Sunflower by Improving the Photosynthesizing Leaf Area

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