Os objetivos deste estudo foram avaliar a uniformidade da irrigação diurna e noturna de um sistema por aspersão convencional, analisando os efeitos do vento ao longo do tempo de irrigação pelos gráficos individuais de Shewhart. O experimento foi realizado no Colégio Agrícola Estadual Adroaldo Augusto Colombo, em Palotina, PR. Foram utilizados aspersores Xcel-wobbler, com sistema antideriva nos períodos diurno e noturno. O uso dos gráficos individuais de controle de Shewhart possibilitou afirmar que a irrigação noturna esteve sob controle ao longo do tempo. Foi possível observar que entre julho e setembro, o melhor desempenho do sistema ocorreu no período noturno, mostrando-se como o mais indicado para realizar irrigações por aspersão na localidade de Palotina-PR.Palavras-chaves: água, vento, coeficiente de Christiansen, gráfico de controle.
This study aimed to evaluate the effect of applying increasing doses of biofertilizer obtained by the anaerobic digestion of cassava effluent on the development of crambe plants. The experiment was conducted in a protected environment at the Federal University of Paraná (UFPR), Palotina Sector, between April and August 2015. A completely randomized design was used, and five different treatments with the following doses were applied in five replicates: 0, 40, 80, 120, and 160 kg ha-1 of K2O. The following parameters related to plant development were evaluated: final height, stem diameter, number of branches, dry shoot and root biomass, mass of the grains, and oil content. The 160 kg K2O ha-1 dose was found to have the best influence on the plant development, because all the measured parameters reached their highest values at this dose, except for oil content, which attained the highest percentage in the case of the control treatment (0 kg ha-1 of K2O). This study proved that the biofertilizer obtained by anaerobic digestion of cassava effluent can be used as an alternative to regular fertilizers in cultivating crambe.
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