Cowpea yield and quality after application of desiccating herbicides

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.

摘要：本研究旨在评估收获前干燥剂型除草剂（desiccant herbicides）对收获后及贮藏后豇豆种子的产量、生理与工艺品质的影响。
本实验采用随机区组设计（randomized block design），设置4次重复。实验采用6×2裂区设计（split-plot design），供试处理包括5种干燥剂型除草剂及1个空白对照：氟烯草酸（flumioxazin，30 g ai·ha⁻¹）、草铵膦（glufosinate ammonium，500 g ai·ha⁻¹）、百草枯（paraquat，400 g ai·ha⁻¹）、丙炔氟草胺（saflufenacil，70 g ai·ha⁻¹）、唑草酮（carfentrazone，24 g ai·ha⁻¹）；同时设置2个种子评价周期，分别为收获时及收获后6个月。供试除草剂于豇豆R5生育期施用。
供试药剂对“BRS Guariba”豇豆种子的产量、分级、色泽及生理品质均存在显著影响。其中草铵膦与百草枯会损害种子的生理品质。氟烯草酸对种子产量构成因子、色泽及生理品质均无显著影响。在20℃条件下贮藏6个月会对种子生理品质产生影响。