English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

No cerrado brasileiro a deficiencia de boro no solo ocorre com maior frequencia. A cultura do girassol e muito sensivel a deficiencia deste micronutriente, alem de apresentar pouca eficiencia em seu aproveitamento. Neste contexto, objetivou-se com este estudo avaliar as respostas de cultivares de girassol a doses crescentes de boro no periodo da entressafra no cerrado tocantinense. O experimento foi conduzido em Gurupi, (TO), com sistema de plantio direto em sucessao a soja, sobre Latossolo Vermelho Amarelo distrofico. O delineamento experimental utilizado foi de blocos casualizados, com quinze tratamentos e quatro repeticoes. Os tratamentos foram dispostos num esquema fatorial simples 3 x 5, constituido por tres cultivares de girassol (variedade Br 122, hibridos Aguara 4 e Helio 863) e cinco doses de acido borico (0, 1, 2, 3 e 4 kg ha -1 ). As caracteristicas avaliadas foram: altura de planta, diâmetro da haste, diâmetro do capitulo, concentracao de boro foliar, massa de mil aquenios e produtividade de aquenios. A dose de 3 kg ha -1 de boro proporcionou, em sua grande maioria, as melhores respostas das cultivares Br 122, Aguara 4 e Helio 863 quanto as caracteristicas avaliadas. No entanto, com esta dose, a cultivar Aguara 4 apresenta melhor aproveitamento para producao de aquenios. Responses of sunflower cultivars to increasing doses of boron in the between harvests the Cerrado Tocantinense Abstract : In the brazilian cerrado soil boron deficiency occurs more frequently. The sunflower crop is very sensitive to this micronutrient deficiency, and have little efficiency in its use. In that context, aimed to of this study was to evaluate the response of sunflower cultivars to increasing doses of boron during the between harvests in the cerrado tocantinense. The experiment was conducted in Gurupi (TO), with no-tillages soybeans in succession on dystrophic Red Yellow Latosol. The experimental design was a randomized block design with fifteen treatments and four replications. The treatments were arranged in a factorial 3 x 5 simple, composed of three cultivars of sunflower (variety Br 122, hybrid Aguara 4 and Helio 863), and five doses of boric acid (0, 1, 2, 3, and 4 kg ha -1 ). The characteristics evaluated were: plant height, stem diameter, head diameter, leaf boron concentration, weight of thousand achenes and productivity achenes. The dose of 3 kg ha -1 resulted boron, mostly, the best responses of the cultivars Br 122, Aguara 4 and Helio 863 on the characteristics evaluated. However, at this dose, the cultivar Aguara 4 has better use for achene production.

Respostas de cultivares de girassol a doses crescentes de boro na entressafra do Cerrado Tocantinense