RESUMOHydrolyzed cassava peel showed the best economic efficiency between treatments. The different methods of processing cassava peel do not affect performance, carcass characteristics, yield cuts or rumen morphology of Santa Ines sheep.
A determinação dos períodos de interferência torna-se necessário para delinear medidas de manejo de plantas daninhas em pastagens, principalmente quando a comunidade infestante interfere na produção de forragem. Assim, objetivou-se determinar os períodos de interferência de plantas daninhas na implantação da pastagem de Urochloa brizantha e avaliar a capacidade de rebrota desta após o corte. Foram conduzidos dois ensaios relacionados aos períodos de convivência e de controle de plantas daninhas com a forrageira. No primeiro, os tratamentos consistiram em períodos de convivência a partir da emergência com períodos iniciais crescentes de 7, 14, 21, 28, 35, 42, 49, 56 e 66 dias após a emergência (DAE) de U. brizantha. As parcelas foram mantidas livres da convivência de plantas daninhas por capinas manuais semanais após cada período de convivência. No segundo, os tratamentos consistiram em períodos de controle, onde a forrageira foi mantida, a partir da emergência, sem a convivência com plantas daninhas pelos mesmos períodos, e aquelas que emergiram após não foram controladas até o corte da forrageira, aos 66 DAE. Nicandra physaloides foi a planta daninha de maior ocorrência na pastagem. Quanto maior foi o período de convivência das plantas daninhas com a forrageira maior foi a interferência daquelas sobre o perfilhamento e a produção de forragem, principalmente de folhas. O período crítico de interferência de plantas daninhas na pastagem situou-se dos 8 aos 34 DAE. Na rebrota da forrageira, a interferência de plantas daninhas afetou o perfilhamento, cobertura vegetal das parcelas e a produção de folhas da forrageira.
The use of soybean varieties resistant to the herbicides dicamba and 2,4-D may lead to drifts towards areas grown with non-resistant varieties. The aim of this study was to evaluate the effects of dicamba and 2,4-D underdoses applied at the phenological stages V4 and R2 of soybeans. Two experiments were conducted with dicamba or 2,4-D in a randomized block design with four replications. The 4 × 2 + 1 factorial scheme was composed of four doses (0.028, 0.28, 2.8, and 28 g ae ha−1) of dicamba or 2,4-D applied at two phenological stages (V4 and R2) + a control treatment (without herbicide application). Dicamba underdoses caused damage to soybean crop affecting its vegetative growth and yield; the injuries caused by 2,4-D were neither enough to damage crop nor affect yield components. Dicamba underdoses applied at V4 caused injuries of up to 41%, while in R2 they reached 70%. Plant height decreased by up to 61% when treated with dicamba. Soybean yield was reduced by 29 and 76% when the simulated drift occurred at V4 and R2, respectively, and at a dose of 28 g ae ha−1 of dicamba. For the tested underdoses, only 2,4-D had no effect in soybean crop yield.
Abstract: The aim of this study was to evaluate the effects of pre-harvest desiccant herbicides on the yield and the physiological and technological quality of cowpea seeds after harvest and after storage. The experiment was conducted in a randomized block design with four replications. A split-plot design (6 × 2) was composed of the desiccant herbicides flumioxazin (30 g ai.ha-1), glufosinate ammonium (500 g ai.ha-1), paraquat (400 g ai.ha-1), saflufenacil (70 g ai.ha-1), and carfentrazone (24 g ai.ha-1) and an untreated control, as well as two seed evaluation periods, at harvest and six months after h arvest. Desiccants were applied at the R5 stage. The desiccants affected the yield, classification, color, and physiological quality of seeds of ‘BRS Guariba’. The glufosinate ammonium and paraquat herbicides compromised seed physiological quality. Flumioxazin did not affect seed yield components, color, and physiological quality. Storage at 20 °C for six months affected seed physiological quality.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.