Interferência de Urochloa plantaginea na morfofisiologia e componentes de produtividade do feijão do tipo preto

Abstract

The objective of this project was to determine the periods of interference of papua on the beans of the black type. The experiment was conducted in a randomized complete block experimental design with four replications. The bean cultivar of the black type used was IPR Uirapuru, being the treatments separated in two models of interference: in the coexistence group the culture of the bean lived with the papua by growing periods of 0, 7, 14, 21, 28, 35 and 42 days after emergence and throughout the cycle; in the control group the culture was kept free of the infestation for the same periods described previously. At 42 DAE were evaluated the variables related to plant morphology and physiology. Considering the results, it is possible to conclude that the critical period of interference prevention (CPIP) comprises 24 to 50 DAE, the period before the interference (PBI) was 24 DAE and the total period of interference prevention (TPIP) was 50 days and that the morphological and physiological variables of the plants were negatively affected in the coexistence with the papuã when compared to the treatments kept free of weeds throughout the crop cycle.