Boro e estresse hídrico na produção do girassol

Castro, C. de; Moreira, Adônis; Oliveira, Ricardo Ferraz de; Dechen, Antonio Roque

doi:10.1590/s1413-70542006000200004

Cited by 38 publications

(28 citation statements)

References 3 publications

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“…These reports concur with the findings of Castro et al, (2006), who found that soil moisture control hastened the development of the sunflower crop, under controlled conditions; they also identified a decrease in the plant total dry weight in all the stages of drought implemented. Nobre et al (2010) also confirmed that the soil water content exerted a positive effect on the dry mass of shoot of the sunflower plants.…”

Section: Effect Of Soil Moisture Maintenance Methods On the Sunflowersupporting

confidence: 91%

Methods of soil moisture maintenance for production of sunflower under controlled conditions

Fontenelli¹,

Silva²,

Bonfim-Silva³

et al. 2017

Aust J Crop Sci

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Soil water content is one of the most significant restriction factors for plant growth and development. This study focused on evaluating the methods of soil moisture maintenance during trials under controlled conditions by observing the morphological and structural characteristics of sunflower (Helianthus annuus L.). The experiments were performed in a greenhouse using an Oxisol. Four types of soil moisture maintenance treatments were tested (tensiometer, Irrigas, gravimetric method and self-irrigation system) with eight repetitions, employing a completely randomized experimental design. The variables analyzed included plant height, leaf number, stem diameter, and dry mass of shoot. The self-irrigation system was found to be technically fitting to manage the irrigation throughout the growth and development period of sunflower. The gravimetric method enabled a higher accumulation of dry mass of shoot.

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Section: Effect Of Soil Moisture Maintenance Methods On the Sunflowersupporting

confidence: 91%

Methods of soil moisture maintenance for production of sunflower under controlled conditions

Fontenelli¹,

Silva²,

Bonfim-Silva³

et al. 2017

Aust J Crop Sci

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“…A exigência em boro pelo girassol é alta quando comparado com outras espécies cultivadas, sendo pouco eficiente na absorção deste nutriente do solo, podendo ter perdas de 15 a 40% quando cultivado em solos com baixo teor deste micronutriente (SOUZA et al, 2004). Para a correção da deficiência de boro, recomenda-se 1,0 a 2,0 kg ha -1 do nutriente (CASTRO, 2006). A falta desde micronutriente na cultura ocasiona redução no crescimento e na produção de massa seca, redução no tamanho do capítulo e na massa das sementes, com redução nos conteúdos de açúcares, óleo e amido (BONACIN et al, 2008).…”

Section: Resultsunclassified

Doses de boro e água residuária na produção do girassol

Santos¹,

Gheyi²,

Dias

et al. 2011

Rev. Ciênc. Agron.

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Resumo -A disponibilidade hídrica de qualidade tem se tornado em todo o mundo, um dos principais entraves à expansão das fronteiras agrícolas. Dentro deste contexto o presente trabalho teve como objetivo avaliar os efeitos de doses de boro e da irrigação com dois tipos de água, residuária e de abastecimento, nos componentes de produção do girassol (Helianthus annuus L.) cv. EMBRAPA 122/V-2000. A pesquisa foi realizada em ambiente protegido da Universidade Federal de Campina Grande, em delineamento em blocos casualizados, analisados em esquema fatorial 5 x 2 sendo cinco doses de boro (0 -testemunha; 1,0; 2,0; 3,0 e 4,0 mg L -1 ) combinados com dois tipos de água de irrigação (R -residuária e AB -abastecimento), com três repetições. A análise estatística compreendeu análises de variância (teste F) e as médias foram comparadas pelo teste de Tukey para comparar os fatores qualitativos em 0,05 de probabilidade. Verificou-se que as doses de boro e tipos de água utilizados não influenciaram nenhuma variável ligada à produção de aquênios; no entanto, a irrigação com água residuária influenciou positivamente as variáveis fitomassa fresca e seca das folhas, do caule e da parte aérea, todas ligadas à produção de forragem. Palavras-chave -Disponibilidade hídrica. Reúso de água. Helianthus annuus -Produtividade. Aquênios.Abstract -The availability of water of quality has become worldwide, a major constraint to expanding agricultural frontiers. Within this context, this study aimed to evaluate the effects of boron doses and irrigation with two types of water, wastewater and municipal supply water, on yield components of sunflower (Helianthus annuus L.) cv. EMBRAPA 122/V-2000. The study was conducted in a greenhouse at the Federal University of Campina Grande, in a randomized block design, analyzed in a 5 x 2 factorial with five B of boron (0; 1.0; 2.0; 3.0 and 4.0 mg L -1 ) combined with two types of irrigation water (R -wastewater and AB -municipal supply water) with three replications. Statistical analysis consisted of analysis of variance (F test) and means were compared by Tukey test to compare qualitative factors at 0.05 probability. It was found that the boron levels and types of water did not affect any varieble related to production of seeds, however, irrigation with wastewater variables positively influenced the fresh and dry leaves, stem and shoot all related to forage production.

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“…The BRS 321 genotype presented the highest oil yield with B + 50 N treatment; in other words, B fertilization might influence BRS 321 oil yield (Table 6). By testing increasing B doses (0, 0.25, 0.5 and 2 mg dm -3 B), Castro et al (2006) observed the influence of B application on grain production and oil yield, mainly at 0.5 mg dm -3 doses and independently of water conditions. BRS 321 genotype plants presented higher production of empty grains when they were restricted to B fertilization (Table 6).…”

Section: Grain and Oil Productionmentioning

confidence: 98%

<b>Different nitrogen and boron levels influence the grain production and oil content of a sunflower cultivar

et al. 2017

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ABSTRACT. Nitrogen is essential for plant growth and development and directly influences both grain production and oil content. Boron has been studied in sunflower cultivation due to high demand of this culture for this nutrient. This study aimed to evaluate the N and B differential supply effect on the grain and oil production of sunflower plants. The experiment was conducted in a greenhouse and used two sunflower hybrids: BRS 321 and Neon. N and B were applied via nutritive solution according to the following treatments: B + 50 N (2.49 kg ha N at planting). Analyses of total N and B in all collected plant parts were performed, as well as measurements of grain production for each chapter and oil extraction at the end of the cycle. The association between B fertilization and a greater amount of N fertilization was essential to BRS 321 oil production. Regarding grain production at lower levels of N fertilization, Neon presented the best response to B application.Keywords: Helianthus annuus L., oilseed, total N, oil extraction. Diferentes níveis de Nitrogênio e Boro influenciam a produção de grãos e óleo em cultivares de girassolRESUMO. O nitrogênio é essencial para o crescimento e desenvolvimento das plantas e tem influência direta na produção de grãos e conteúdo de óleo. O boro tem sido bastante estudado no cultivo de girassol, devido a alta exigência desta cultura por este nutriente. Este trabalho teve por objetivo avaliar o efeito de nitrogênio e boro na produção de grãos e óleo em plantas de girassol. O experimento foi conduzido em casa de vegetação utilizando-se dois híbridos: BRS 321 e Neon. N e B foram aplicados em solução nutritiva: B + 50 N (2,49 kg de B ha no plantio). Ao final do ciclo foi analisado os teores de N e B total em todas as partes das plantas, produção de grãos por capítulo e teor de óleo. A combinação entre o fornecimento de B com a maior adubação nitrogenada foi essencial para a produção de óleo pelo híbrido BRS 321. Em relação à produção de grãos com menor adubação nitrogenada Neon apresentou a melhor resposta à aplicação B. Palavras-chave:Helianthus annuus L, oleaginosa, N-total, extração de óleo.

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Boro e estresse hídrico na produção do girassol

Cited by 38 publications

References 3 publications

Methods of soil moisture maintenance for production of sunflower under controlled conditions

Methods of soil moisture maintenance for production of sunflower under controlled conditions

Doses de boro e água residuária na produção do girassol

<b>Different nitrogen and boron levels influence the grain production and oil content of a sunflower cultivar

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