Umuarama, Brazil
Umuarama, Brazil

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da Silva T.R.B.,UEM CCA DCA Agronomia | Schmidt R.,Engenheiro Agronomo graduado pela Faculdade Assis Gurgacz FAG | da Silva C.A.T.,West Parana State University | Nolla A.,UEM CCA DCA Agronomia | And 2 more authors.
Journal of Food, Agriculture and Environment | Year: 2011

Wheat is one of the most important cereals used for feed. In order to supply this growing demand, more genotypes have been developed with higher yield potential, becoming necessary to offer nutritional requirements. Such requirements, as nitrogen element is considered a yield limiting factor, since the crop requires high rates, what may result in excessive growth of plant and possible lodging. This constitutes an undesirable characteristic for obtaining quality products with high yield and in order to minimize this limiting factor, growth regulator use is recommended. The experiment was conducted at Cafelandia County, Parana State, Brazil, objectifying to test the influence of Trinexapac-ethyl and nitrogen fertilization rates on wheat crop. The experiment was conducted in randomized complete blocks design, in sub-plots scheme, with six treatments. Plant height, ear size, hectolitre weight and yield were evaluated. The results showed that Trinexapac-ethyl application reduced plant height without affecting yield components and nitrogen application did not affect wheat crop development.


da Silva C.A.T.,West Parana State University | Cagol A.,Graduado pela Faculdade Assis Gurgacz FAG | da Silva T.R.B.,UEM CCA DCA Agronomia | Nobrega L.H.P.,West Parana State University
Journal of Food, Agriculture and Environment | Year: 2011

The sunflower (Helianthus annuus) gives good yields, provided that there is advanced sowing, with limed soil and favorable climatic conditions for the better development and higher yield. To be fertile, the sunflower demands boron, a deficiency of it may limit the yield. This work aimed at evaluating the field interaction between two boron-based commercial products and two sunflower hybrids and the control. This work was conducted in Realeza Municipal District, Paraná State, Brazil, in Udic Dystrophic Oxisol. Treatments consisted of two hybrids of Nidera Company (Paraiso 20 and 33) and two commercial products, the sodium octaborate (20.5%) 9 kg ha-1 and boric acid (18.5%) 10.8 kg ha-1, arranged in randomized blocks in a factorial outline 3 x 2 with four replications. The following parameters were evaluated: Plant height, stem diameter, head seed diameter and hundred seed weight and yield. There was no significant difference between the sunflower hybrids. The pre-seeding boron application, regardless the source, positively influences the crop development.


da Silva T.R.B.,UEM CCA DCA Agronomia | Lavagnolli R.F.,Pos graduando em Fertilidade de Solos e Nutricao de Plantas | Nolla A.,UEM CCA DCA Agronomia
Journal of Food, Agriculture and Environment | Year: 2011

Crambe, a winter crop with high oil content, is a source of raw material for the biodiesel production. This crop deserves attention from agriculture because of the short cycle ranging from 90 to 100 days. This work was conducted in Cascavel Municipal District, Paraná State, Brazil, in udic dystrophic oxisol. The aim was to verify the fertilizer effects of phosphorus (0,40, 80 and 120 kg ha -1) and zinc (0 and 80 g ha -1) in crambe crop development. Super phosphate was applied on the seedling time and foliar spraying of zinc sulphate was done at 35 days after emergency. The results showed that leaf application of zinc did not cause modifications in the vegetative and reproductive development of crambe, however, the phosphorus applied on seedling stage increased oil content and a thousand grain mass and consequently also increased crambe yield in two cropping years.

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