Evaluation of sunflower cultivars for central Brazil

Porto, Willyam Stern; Carvalho, C. G. P. de; Pinto, Ronald José Barth; Oliveira, Marcelo Fernandes de; Oliveira, A.

doi:10.1590/s0103-90162008000200005

Cited by 28 publications

(38 citation statements)

References 4 publications

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“…The high AMF infection rate, which helps the uptake of micronutrients (Table 6), may explain the high amounts of Zn returned to the soil when sunflower was grown before sugarcane. There is an increasing utilization of sunflower as a crop rotation with sugarcane in Brazil, due to its use for silage, seed oil production, and to its potential as a feedstock for biodiesel (Porto et al, 2008) The amounts of N in the above-ground parts of sunn hemp (Table 4) were relatively low compared to those of Caceres and Alcarde (1995), who reported the extraction of up to 230 kg ha -1 of N, and to those of Ambrosano et al (2005), who found 196 kg ha -1 of N. However, the amounts of N returned to the soil are directly related to the nutrient concentration in the plant, which varies with the local potential for biological nitrogen fixation (BNF) and with the growth stage of the crop at the time of cutting, and with the biomass yield, which is affected by the weather, soil, and crop growing conditions. Perin et al (2006) found substantial amounts of N derived from BNF present in the above ground parts of sunn hemp (57.0%) grown isolated and 61.1% when intercropped with millet (50% seeded with each crop).…”

Section: Resultsmentioning

confidence: 99%

Crop rotation biomass and arbuscular mycorrhizal fungi effects on sugarcane yield

Ambrosano¹,

Azcón²,

Cantarella

et al. 2010

Sci. agric. (Piracicaba, Braz.)

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Sugarcane (Saccharum spp.) is an important crop for sugar production and agro-energy purposes in Brazil. In the sugarcane production system after a 4-to 8-year cycle crop rotation may be used before replanting sugarcane to improve soil conditions and give an extra income. This study had the objective of characterizing the biomass and the natural colonization of arbuscular mycorrhizal fungi (AMF) of leguminous green manure and sunflower (Helianthus annuus L.) in rotation with sugarcane. Their effect on stalk and sugar yield of sugarcane cv. IAC 87-3396 grown subsequently was also studied. Cane yield was harvested in three subsequent cuttings. Peanut cv. IAC-Caiapó, sunflower cv. IAC-Uruguai and velvet bean (Mucuna aterrimum Piper and Tracy) were the rotational crops that resulted in the greater percentage of AMF. Sunflower was the specie that most extracted nutrients from the soil, followed by peanut cv. IAC-Tatu and mung bean (Vigna radiata L. Wilczek). The colonization with AMF had a positive correlation with sugarcane plant height, at the first cut (p = 0.01 and R = 0.52) but not with the stalk or cane yields. Sunflower was the rotational crop that brought about the greatest yield increase of the subsequent sugarcane crop: 46% increase in stalk yield and 50% in sugar yield compared with the control. Except for both peanut varieties, all rotational crops caused an increase in net income of the cropping system in the average of three sugarcane harvests. Key words: green manure, legumes, biological nitrogen fixation, sugarcane stalk yield Produção de biomassa e presença de fungos micorrízicos arbusculares em culturas utilizadas em rotação com a cana-de-açúcarRESUMO: A cana-de-açúcar (Saccharum spp.) vem sendo cultivada no Brasil para produção de açúcar e agroenergia. Em seu sistema de produção, após um ciclo de 4 a 8 anos, é possível a rotação com plantas de cobertura, antes do seu replantio, para melhoria do solo e geração de renda. Estudou-se a caracterização e produtividade de biomassa de leguminosas (como adubos-verdes) e girassol (Helianthus annuus L.), a ocorrência natural de micorrizas, o teor de açúcar e a produtividade em colmos da cana-de-açúcar IAC 87-3396 e a viabilidade econômica desse sistema com cultivo após as opções de rotação, com quantificação da produtividade durante três cortes consecutivos. O amendoim (Arachis hypogaea L.) cv. IAC-Caiapó, girassol cv. IAC-Uruguai e mucuna-preta (Mucuna aterrimum Piper and Tracy) foram as culturas que apresentaram maior percentagem de colonização por fungos micorrízicos. O girassol foi a planta de cobertura que mais extraiu nutrientes do solo, seguido por amendoim (Arachis hipogaea L.) cv. IAC-Tatu e feijão-mungo (Vigna radiata L. Wilczek). A colonização por fungos micorrízicos mostrou correlação positiva com a altura de plantas de cana no primeiro corte (p = 0,01 e R = 0,52), mas não se correlacionou com a produtividade de colmos ou açúcar. No primeiro corte, o girassol foi a cultura de rotação que ocasionou o maior aumento de produtividade, da ord...

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Section: Resultsmentioning

confidence: 99%

Crop rotation biomass and arbuscular mycorrhizal fungi effects on sugarcane yield

Ambrosano¹,

Azcón²,

Cantarella

et al. 2010

Sci. agric. (Piracicaba, Braz.)

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“…In addition of producing edible oil, sunflower is also a potential renewable energy source, as it can be used as a raw material for biodiesel (Porto et al, 2008). The global demand for sunflower oil has increased 1.8% per year, in average, whereas the domestic demand grows 13% per annum (Rosa et al, 2009), resulting in a gradual increase in sunflower crop area in Brazil.…”

Section: Introductionmentioning

confidence: 99%

Sunflower meal and enzyme supplementation of the diet of 21- to 42-d-old broilers

Araújo

Albino²,

Rostagno³

et al. 2014

Rev. Bras. Cienc. Avic.

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“…As cultivares apresentaram média de produtividade de 1.639 kg ha -1 (TAB 2), sendo inferior a obtida por Smiderle et al (2005) Porto et al (2008), em estudo realizado no Brasil Central com cultivares de girassol em três anos agrícolas. Entretanto, para as condições do Distrito Federal esse valor está aquém dos rendimentos obtidos, que estão acima de 2.500 kg ha -1 (FARIAS NETO et al, 2000).…”

Section: Resultsunclassified

Formas de aplicação de nitrogênio em três cultivares de girassol na savana de Roraima

Ivanoff¹,

Uchôa²,

Alves³

et al. 2010

Rev. Ciênc. Agron.

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-Nitrogen is the nutrient that limits most the production in the culture of sunflower (Helianthus annuus L). The nutritional requirements among cultivars of the same species is distinct, under the same conditions of culture and for the same agricultural year. With the objective of evaluating four different ways of nitrogen application in the production components of different genotypes of sunflower, an experiment was carried out in a randomized block design in a 3 x 4 factorial scheme (genotypes x ways of nitrogen applying) with four replicates . The treatments consisted on the combination of three varieties: Agrobel 960, Agrobel 962 and V -2000 and four different ways of nitrogen application: 100% at 20 days after sowing (DAS) -(0-100-0-0); 30% at sowing and 70% at 20 DAS -(30-70-0-0); 30% at sowing, 30% at 20 DAS e 40% at 40 DAS 20% at sowing, 30% at 20 DAS,. Measured variables were: height of the plant, height of the capitulum, diameter of the stem, diameter of the capitulum and achene yield. The ways of nitrogen application affected all components of yield. The N formulation (30-70-0-0) has determined the best results for the variables studied, but the form (30-30-40-0) provided results comparable to treatment (30-70-0-0); treatments where N was applied as (20-30-30-20) caused decrease in the performance of sunflower for all variables. The varietal effect was observed only for plant height and height of the capitulum. The highest yield of achene achieved was 1.639 kg ha-1, with no superiority for the hybrids Agrobel 960 and 962 in relation to the variety 122/V2000 Embrapa.

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Evaluation of sunflower cultivars for central Brazil

Cited by 28 publications

References 4 publications

Crop rotation biomass and arbuscular mycorrhizal fungi effects on sugarcane yield

Crop rotation biomass and arbuscular mycorrhizal fungi effects on sugarcane yield

Sunflower meal and enzyme supplementation of the diet of 21- to 42-d-old broilers

Formas de aplicação de nitrogênio em três cultivares de girassol na savana de Roraima

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