Emergence and dry matter of weeds in papaya crop (Carica papaya)

摘要

The objective of this work was to evaluate the seed bank of weeds through the seedling emergence method in papaya crop, using different tillage systems. A randomized complete block design was used, with three replications and six treatments: weeding in total area, herbicide in the rows + disc in the interrows, crossed sub soiling before planting + weeding in total area, crossed sub soiling before planting + herbicide in the rows and pig bean in the interrows, crossed sub soiling before planting + herbicide in the row + crotalaria in the interrows and crossed sub soiling before planting + herbicide in the rows + native vegetation in the interrows, cleared when necessary. Seed bank evaluation was performed at 30, 60, 90 and 120 days after implantation of the experiment in the greenhouse with samples collected in the field in the rainy and dry seasons at 0-15 cm in depth. Weed dry matter was obtained by using a square of 0.5 x 0.5 m sorted four times in the plots. The weeding management systems in total area and herbicide in the row + disc in the papaya crop interrows with pig bean and crotalaria reduce seed bank in the soil. Among the green fertilizers, crotalaria alters more significantly the dynamics of the seed bank than pig bean.