Vinícius Batista Campos

Crescimento de cultivares de girassol ornamental influenciado por doses de silício no solo

Few experimental studies have been carried out to analyze growth of the ornamental sunflower under protected environment conditions. Thus, the aim of this study was to evaluate effects of different silicon doses on the growth of two cultivars of ornamental sunflower. The experiment was conducted in a greenhouse, from September to December 2010. The treatments were arranged in a completely randomized design with three replications in a 5 x 2 factorial scheme, referring to doses 0; 2; 4; 6 and 8 g of Si per pot and cultivars of ornamental sunflower Jardim Amarelo Alto and Sol Vermelho. Each experimental unit consisted of a plastic pot with a capacity of 10 L, with 5.33 L of soil. All experimental units were fertilized with N:P2O5:K2O in a dose of 60-80-80 kg ha-1. Doses of silicon significantly increased the external capitulum diameter and the total opening of flower bud (days) sunflower plant. The cultivar Sol Vermelho showed better response to the application of silicon compared to Jardim Amarelo Alto.

Esterco bovino líquido em luvissolo sódico: Resposta biométrica e produtiva do maracujazeiro amarelo

The objective of the present study was to evaluate the effect of liquid bovine biofertilizer on the biometry and the dry matter production of yellow passion fruit seedlings grown on sodic Luvissol. The experiment was performed in the Department of Soil and Rural Agricultural Engineering of the Center of Agricultural Sciences (CCA), Federal University of Paraiba (UFPB), from August to October 2008. The experimental design was that of randomized blocks in split plots, where the plots were the levels of liquid biofertilizer at 0, 25, 50, 75 and 100% by volume of 10% of the total substratum volume (250 mL), the subplots were the five plant evaluation periods (45, 60, 75, 90 and 105 days after the sowing); the experiment was performed in quadruplicate. The application of biofertilizer was made 30 days before sowing, followed by a washing of the soil (two days after of biofertilizer application); a second application of the biofertilizer was made 48 hours before sowing, followed by a soil washing similar to that of the first application. Non-saline water was used for irrigation, adding the water equivalent to the evapotranspiration rate per 24 hours, based on weighing the pots. The increased level of organic matter input provided greater plant height and stem diameter, as well as greater leaf number, foliar area and total dry matter, surpassing the control by 134.78; 114.72; 127.35; 416.54 and 107.97%, respectively.

Estéreo bovino líquido em luvissolo sódico: II. Emergência e análise de crescimento do maracujazeiro amarelo¹

EnglishAn experiment was carried out in green house in order to evaluate at initial growth of yellow passion plants submitted to application of liquid bovine biofertilizer applied to soil in liquid form to levels equivalent to 0, 25, 50, 15 and 100% in volume corresponding to 10% (250 mL) of volume of the substrate and plant evaluation at five ages 45, 60, 15, 90 and 105 days after sowing. The supply of biofertilizer was applied in two epochs. The first 30 days the before the sowing followed by soil washing two days after application of biofertilizer and the second 48 hours before sowing and soil washing. The plants were irrigated with non saline water (EC = 0.21 dS m-1) adding water volume equivalent to evapotranspirat during 24 hours. The emergence of yellow passion fruit plants was superior in treatments with higher levels of biofertilizer applied to soil, over there of organic product provide more absolute growth rate of plants. portuguesUm experimento foi desenvolvido em casa de vegetacao em blocos em parcelas subdivididas com objetivo de avaliar a emergencia e analise de crescimento do maracujazeiro amarelo num solo sodico submetido a aplicacao de biofertilizante bovino liquido aplicado ao solo aos niveis percentuais de 0, 25, 50, 15 e 100% em volume correspondente a 10% (250 mL) do volume do substrato para avaliacao das plantas aos 45, 60, 15, 90 e 105 dias apos a semeadura. O fornecimento do biofertilizante foi realizado em duas etapas: a primeira aos 30 dias antes da semeadura mais lavagem dois dias apos a aplicacao e a segunda 48 horas antes da semeadura procedendo a lavagem semelhante a primeira aplicacao. As plantas foram irrigadas com agua nao salina (CE= 0,21 dS m-1) fornecendo o volume de agua evapotranspirado de cada 24 horas com base no processo de pesagem. O desbaste das plantulas foi realizado aos 28 dias apos a semeadura deixando-se apenas uma planta por unidade experimental. O percentual de emergencia do maracujazeiro amarelo foi superior nos tratamentos com maior percentagem de biofertilizante adicionado, alem do insumo proporcionar maior taxa de crescimento absoluto das plantas