Características morfofisiológicas de sementes e produção de girassol em função de boro no solo

Bonacin, Gisèle Aparecida; Rodrigues, Teresinha de Jesus Deléo; Cruz, Mara Cristina Pessôa da; Banzatto, David Ariovaldo

doi:10.1590/s1415-43662009000200001

Cited by 10 publications

(8 citation statements)

References 8 publications

(6 reference statements)

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“…The average height of the crambe plants was 122, 134 and 120 cm for the application of 0, 1 and 8 mg kg -1 boron doses, respectively (Table 3). Bonacin et al (2009) did not find significant effect on plant height when applying boron doses between 0 and 4 kg ha -1 in sunflower (Helianthus annuus) cultivated in a Red Latosol. Furlani et al (2001) did not verify height difference in four soybean (Glycine max) cultivars (IAC-1, IAC-8, IAC-15 and IAC-17) as a result of boron fertilization.…”

Section: Resultsmentioning

confidence: 79%

Effects of boron fertilization on a crambe crop cultivated in oxisols

Santos¹,

JÃonior²,

Pereira³

et al. 2016

Afr. J. Agric. Res.

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The consolidation of crambe crops in the agricultural and industrial scenarios comes up against the lack of recommendations and technical information on their cultivation. Thus, this study aims to analyze the effects of boron fertilization on a crambe crop cultivated in two oxisols. The experiment was conducted in a greenhouse owned by the Agronomic Institute of Paraná, in the city of Santa Tereza do Oeste-PR. The treatments were arranged in a 2×3 factorial scheme. Two oxisols with different textures (clayey and medium texture) were used, and three boron rates (0, 1, and 8 mg kg-1) were applied to the soil. A randomized complete block design with five replications was used. The experimental unit consisted of a vase containing 2.0 kg of soil with two crambe plants. Plant height, dry matter yield of roots, stems and fruit, number of fruit per plant, number of branches per plant, 100-seed weight and leaf boron content were assessed. Soil texture did not affect any variable. There was no significant interaction between the boron rates applied and soil texture. Plant heights, number of branches per plant and fruit dry matter were not influenced by the boron fertilizer. The number of fruit per plant as well as the dry matter yield of roots, stems and fruit was higher with the application of 1 mg B kg-1 of soil. The amount of boron in the leaves was proportional to the fertilizer rates applied. The application of 8 mg B kg-1 of soil caused toxicity symptoms on crambe leaves.

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Section: Resultsmentioning

confidence: 79%

Effects of boron fertilization on a crambe crop cultivated in oxisols

Santos¹,

JÃonior²,

Pereira³

et al. 2016

Afr. J. Agric. Res.

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“…The capitulum diameter of the BRS 323 genotype was greater at the 4 kg ha -1 dose of B (21.83 cm), while for the BRS 321 genotype it was at the 2.68 kg ha -1 dose (20.62 cm) (Figure 2). B increases the capitulum development of the sunflower, and deficiency of this element can cause reduction and deformations (Bonacin et al, 2008). However, the response to the B increase can vary between genotypes; with the variety BR 122 and the hybrids Aguará and Gurupi having the largest capitulum diameter when nourished with 3 kg ha -1 of B * p < 0.05.…”

Section: Resultsmentioning

confidence: 99%

Sunflower subjected to boron doses in the semi-arid from Northern Minas Gerais, Brazil

Leandro

Menezes

Filho

et al. 2020

Agraria

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The sunflower [Helianthus annuus L. (Asteraceae)] is an annual dicotyledon, and its seeds can be used for animal and human consumption, for extracting fixed oil and for producing biodiesel. This plant is sensitive to boron (B) deficiency, with the scarcity of this micronutrient leading to lesions in the leaves and stem of the sunflower, causing the collapse of the capitulum and decreased photosynthesis. The objective of this study was to evaluate the development and the productive response of the sunflower genotypes BRS 321 and BRS 323, subjected to four doses of B (0, 1, 2 and 4 kg ha -1 ). The experimental design was in randomized blocks with three replicates and 8 treatments. Plant height, plant diameter , capitulum diameter, number of leaves, weight of 1000 achenes, grain yield, fixed oil content and oil yield were all evaluated. Doses greater than 1 kg ha -1 of B caused toxicity symptoms in the vegetative phase in the BRS 321 genotype, however, the 4 kg ha -1 dose of B promoted productive gains to this same genotype. The BRS 323 genotype was more productive in grain and fixed oil than the BRS 321 genotype, regardless of the B doses. In order to avoid phytotoxicity, applications of B to the BRS 321 genotype are recommended.

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“…Embora a característica de altura esteja ligada a fatores genéticos, o manejo e as condições ambientais podem afetar esta característica. Estudos realizados por Bonacin et al (2009) e Lima et al (2013, embora tenham observado diferença significativa entre doses de 1 a 5 kg ha -1 , a máxima altura de planta foi observada na dose de 3 kg ha -1 foi de 1,18 m, altura essa inferior no estudo em questão. Silva (2005, p. 59), trabalhando com dois híbridos de girassol, quatro diferentes lâminas de água e com três doses de B, em Lavras, MG observou incremento de altura das plantas somente nas parcelas irrigadas.…”

Section: Resultsunclassified

Disponibilidadede boro e características do girassol influenciadas pela adubação boratada

Marcondes¹,

Melo²,

Alves³

et al. 2019

Rev Agr Acad

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________________________________________________________________________________ ResumoObjetivou-se verificar a influência de doses de boro (B) sobre a disponibilidade de boro no solo e características do girassol em Tangará da Serra -MT. O delineamento em blocos casualizados com quatro repetições, seis doses de B (0; 0,5; 1,0; 1,5; 2,0 e 4,0 kg ha -1 de B), utilizando-se o ácido bórico. Avaliaram-se teor de B no solo, concentração foliar de B, diâmetro de caule, altura de plantas, diâmetro de capítulo, massa de 1.000 aquênios, massa seca da parte aérea e produtividade. Todas as características foram influenciadas. A dose de 4 kg ha -1 proporcionou toxidade às plantas com efeitos negativos em diâmetro de caule e massa seca da parte aérea. Palavras-chave: Helianthus annuus L., ácido bórico, produtividade, concentração de nutrientes AbstractThe objective of this study was to verify the influence of boron (B) doses on soil boron availability and sunflower characteristics in Tangará da Serra -MT. A randomized block design with four replicates, six doses of B (0; 0,5; 1,0; 1,5; 2,0 and 4,0 kg ha -1 of B) was used, using boric acid. B content in soil, leaf B concentration, stem diameter, plant height, leaf diameter, mass of 1,000 achenes, shoot dry mass and yield were evaluated. All characteristics were influenced. The dose of 4 kg ha -1 provided toxicity to plants with negative effects on shoot diameter and shoot dry mass.

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Características morfofisiológicas de sementes e produção de girassol em função de boro no solo

Cited by 10 publications

References 8 publications

Effects of boron fertilization on a crambe crop cultivated in oxisols

Effects of boron fertilization on a crambe crop cultivated in oxisols

Sunflower subjected to boron doses in the semi-arid from Northern Minas Gerais, Brazil

Disponibilidadede boro e características do girassol influenciadas pela adubação boratada

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