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Mossoró, Brazil

Bratti E.F.,UFGD FCA | Rosa Y.B.C.J.,UFGD FCA | Silva E.F.,UFERSA DCAT | Junior E.J.R.,UFGD FCA | And 3 more authors.
Horticultura Brasileira | Year: 2012

Cultivation of gladiolus in the Brazilian Savannah (locally known as Cerrado), a biome characterized by low fertility and high soil acidity, requires the use of lime and fertilizer, mainly potassium. The effect of lime and potassium rates was evaluated in the cultivation of gladiolus plants in an Oxisol (Typical Haplustox) from Cerrado, in Dourados municipality, Mato Grosso do Sul state. The experiment was carried out in the Univerdidade Federal da Grande Dourados. We adopted the randomized blocks design with four replications; the treatments were arranged in split-plots and the plots were composed of two plants of gladiolus cultivar Peter Pears, grown in plastic pots of 5 L. Thus, five rates of lime (0, 1, 2, 4 and 8 t ha -1) were applied to the main plots one month before planting and five K 2O rates (0, 20, 40, 80, and 160 kg ha -1) were applied to the sub-plots, using potassium chloride (KCl) as source. The length of the leaves, beginning of flowering, durability and number of flower buds, plant height and length of floral stalks were determined. After flowering, fresh weight, length and diameter of the corms and the nutrient content of the shoots were evaluated. The length of the leaves, beginning of flowering and durability of the flower buds were neither affected by liming, nor by fertilization with potassium. Excessive K and CaCO 3 doses were harmful to plant height, length of floral stalk and spike, and reduced the number of flower buds and the diameter of the corm. High concentrations of exchangeable K in the soil decreased absorption of magnesium by the plants. The studied rates of lime and potassium were not efficient for the production of gladiolus plants classified as extra large in the market. Source


de Oliveira F.A.,UFERSA DCAT | de Oliveira M.K.T.,UFERSA DCAT | Lima L.A.,UFERSA DCAT | Bezerra F.M.S.,UFERSA DCAT | And 2 more authors.
IRRIGA | Year: 2015

Fruts of gherkin are highly appreciated in the Brazilian cuisine, however, they have still been little studied. The study was developed to evaluate the effect of nitrogen fertigation on gherkin cultivars grown in substrate of coconut fiber. A completely randomized and factorial design (3 x 4) was used with four replicates, being three cultivars of gherkin (Liso de Calcutá, Liso Gibão and Maxixe do Norte) and four nitrogen concentrations (50, 100, 150 and 200 mg L-1). A total of five fruit harvests were carried out and the following variables were evaluated: longitudinal and cross-sectional diameters, number of fruits, mean fruit weight and total yield per plant. Statistical analysis showed that the Liso de Calcutá cultivar stood out, as it presents greater number of fruits (25.7) and higher yield (640.7 g plant-1). The cultivars had different responses to increasing concentrations of Nitrogen in the nutrient solution. For cultivation of gherkin in coconut fiber, the nutrient solution with Nitrogen concentration of 134 and 129 mg L-1 is recommended for the Liso de Calcutá and Maxixe do Norte cultivars, respectively, and 50 mgL-1 of N for the Liso Gibão cultivar. © 2015, Universidade Estadual Paulista - UNESP. All rights reserved. Source


de Oliveira F.A.,UFERSA DCAT | Alves R.C.,Sao Paulo State University | Bezerra F.M.S.,UFERSA DCAT | Lima L.A.,UFERSA DCAT | And 2 more authors.
IRRIGA | Year: 2014

The physic nut (Jatropha curcas L.) is an oilseed producing plant, and although little studied, it has been considered an option for biodiesel production. The objective of this study was to evaluate the effects of plant growth regulators on plants under or not under salt stress. The experiment was carried out at the Environmental and Technological Sciences Department in the Rural Federal University of the Semi-Arid (UFERSA) in Mossoró-RN. A completely randomized and factorial design (2 × 6) was used with four replications. The treatments consisted of a combination of two salinity levels of irrigation water (0.5 and 5.0 dS m-1) with six concentration levels of plant growth regulator (0, 6, 12, 18, 24 and 30 mL L-1H2O) using the Stimulate® commercial product. The following development parameters were evaluated: number of leaves, leaf area, stem diameter, height and leaf, stem, root and total dry matter. The use of plant growth regulator had a significant effect only when water of lower electrical conductivity (0,5 dS m-1) was used, and the best results were obtained in concentration levels between 15 and 17 mL-1. The plant growth regulator was not efficient in plants under salt stress. © 2014, Universidade Estadual Paulista - UNESP. All rights reserved. Source

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