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URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/3352
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Item Effect of biostimulant and micronutrient on emergence, growth and quality of arabica coffee seedlings(Editora UFLA, 2018-07) Ferreira, Bruno Costa; Lima, Sebastiao Ferreira de; Simon, Cátia Aparecida; Andrade, Maria Gabriela de Oliveira; Ávila, Jorgiani de; Alvarez, Rita de Cássia FélixThe micronutrients and biostimulant use can promote root, shoot and seedling growth. The aim of this work was evaluated the micronutrients and biostimulant application effects on arabica coffee seedling development. The experimental design was a randomized block in factorial 5 x 3, with four replicates. Five cultivars of arabica coffee (Topázio, Catuaí Amarelo, Catuaí Vermelho 99, Catuaí Vermelho 144 and Catiguá) cultivated in green house, combined with biostimulant (Stimulate ® ), of micronutrients (Mo+Co) and control. 150 days after sowing the plants was evaluated. The higher seed germination velocity (0.10) was obtained with micronutrients and biostimulant. The higher height of plant, 8.88 cm, was attained with biostimulant on Catuaí Amarelo. Catuaí Amarelo and Vermelho obtained higher number of leaves (4.5) with biostimulant use and the Catuaí Amarelo (4.38) with micronutrients use. In Catuaí Amarelo was attained higher shoot dry mass and leaf area with biostimulant use, reach 1.69 g and 19.55 cm 2 , respectively. The higher root dry mass values (0.76 g) and Dickson quality index (0.47 and 0.48) was attained with micronutrients use to the Catuaí Amarelo e vermelho cultivars. Seedling development of Catuaí Amarelo was benefited with Stimulate ® application and the cultivar Topázio did not get positive development with Stimulate ® and micronutrients application.Item Doses of phosphorus associated with nitrogen on development of coffee seedlings(Editora UFLA, 2014-07) Santinato, Felipe; Caione, Gustavo; Tavares, Tiago Oliveira; Prado, Renato de MelloA greater supply of nitrogen in the substrate using organic compost for coffee (Coffea arabica L.) seedlings can increase the effects of phosphorus in the plant and thereby promoting growth of biomass, enhancing the growth of plants when they are transplanted into the growing environment. The objective was evaluate the effect of phosphorus levels higher than those usually recommended in the absence and presence of nitrogen supplementation in the preparation of substrate containing organic compound to produce coffee seedlings grown in bags. The experiment was installed at a nursery in Araxá city, Minas Gerais State, Brazil in may 2011, using substrate containing 70 % of soil samples and 30 % of cattle manure, with the addition of 1 kg m -3 of potassium chloride and 1 kg m -3 of dolomitic lime. We used coffee seedlings of Catuaí Vermelho cultivar IAC 144 grown in polyethylene bags (1694 cm 3 ). The experiment was installed in a completely randomized design with four replicates and 12 treatments in a 6 x 2 factorial scheme, with six levels of phosphorus (P): 0, 109, 218, 436, 872 and 1308 mg dm -3 , as triple superphosphate; and two levels of nitrogen (N): absence and 100 mg dm -3 in the form of urea. The biometric variables, seedlings quality indexes, soil P concentration as well as accumulation of N and P by plants were determined at 180 days after sowing. Through regression analysis to conclude that the application of phosphorus in the substrate enhanced the P concentration in soil and plant, reflecting in the growth and dry matter production of coffee seedlings, especially in the presence of nitrogen. The highest tested dose of phosphorus (1308 mg dm -3 ) is the most appropriate dose for the production of coffee seedlings. The addition of nitrogen to the substrate containing cattle manure is important to supply the need of this nutrient in the seedlings.