Instituto de Ciências Agrárias - CAF
URI permanente desta comunidadehttps://locus.ufv.br/handle/123456789/11784
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Resultados da Pesquisa
Item Initial performance of pineapple and utilization of rock phosphate applied in combination with organic compounds to leaf axils(Revista Ceres, 2011-06) Baldotto, Marihus Altoé; Giro, Validoro Bazoni; Baldotto, Lílian Estrela Borges; Canellas, Luciano Pasqualoto; Velloso, Carlos XavierRock phosphates have low solubility in water, but good solubility in acid. The use of organic compounds together with these phosphorus sources applied to the basal leaf axils of pineapple can increase the solubility of this phosfate source and increase the P availability to the crop. A greenhouse experiment was conducted using Araxá rock phosphate (10 g) in combination or not with solutions containing increasing concentrations of humic acids (0 to 40 mmol L-1 of carbon), with or without citric acid (0.005 mmol L-1), applied to basal leaf axils of pineapple cv. Pérola. Growth and nutritional characteristics of aerial plant parts were assessed. Growth rates of aerial parts and N, P, K, Ca and Mg contents increased curvilinearly with increasing concentration of carbon in the form of humic acids. Maximum values were found for the concentration of 9.3 mmol L-1 of carbon combined with 0.005 mmol L-1 of citric acid and natural phosphate.Item Initial performance of corn in response to treatment of seeds with humic acids isolated from bokashi(Revista Ceres, 2015-11-12) Baldotto, Marihus Altoé; Baldotto, Lílian Estrela BorgesThe humified organic matter presents bioactivity similar to the auxinic effect. As bokashi is produced by a special process of humification, information is needed about the bioactive potential of its humic acids. The objective of this work was studying the initial performance of corn-indicator plants in response to the application of different concentrations of humic acids isolated from bokashi. The corn seeds were treated for 16 hours with solutions containing 0, 10, 20, 30, 40 and 80 mmol L-1 of C in the form of humic acids. Then, the seeds were planted in pots of 1 dm3 containing corrected and fertilized soil, in greenhouse. Growth characteristics of shoot and root systems were evaluated. The results showed that the humic acids extracted from bokashi had positive effects on the initial performance of corn.