Quality and yield of canola (Brassica napus) seeds after pre-harvest desiccant application

Planta Daninha

Braccini, A.L.¹  Constantin, J.¹  Inoue, M.H.¹  Marchiori Jr., O.¹  Universidade Estadual de Maringá, Maringá¹  Avila, M.R.¹  Oliveira Jr., R.S.¹  Lawder, M.¹ 

关键词: carfentrazone;    desiccation;    herbicides;    seed health.;   

DOI  :  10.1590/S0100-83582002000200012

学科分类：农业科学（综合）

来源: Sociedade Brasileira da Ciencia das Plantas Daninhas (S B C P D) / Brazilian Society of Herb Science

【 摘 要 】

Canola crop is indicated to integrate crop rotation systems, as well as for agricultural diversification and vegetal ground cover during winter in southern Brazil. However, mechanical harvest is critical to crop production, since pods present a non-uniform ripening, leading to great yield losses, due to natural dehiscence. Desiccants are usually applied to provide a more uniform harvest, maintaining the quality of the product. This work aimed to evaluate the effect of desiccant application on productivity and physiological/sanitary quality of canola (cv. Hyola 401) seeds. The desiccants evaluated were ammonium glufosinate (0.5 kg ha-1), carfentrazone-ethyl (0.03 g ha-1), paraquat (0.4 kg ha-1), diquat (0.3 kg ha-1), and a non-sprayed check. Seed quality was evaluated by germination test, accelerated aging, electrical conductivity, emergence in sand seedbank, speed of emergence-index and seed health. Desiccant application provided a seven-day antecipation of canola seed harvest. Seed yield was not affected by desiccation. Application of ammonium glufosinate and carfentrazone-ethyl decreased (P<0.05) the seed protein contents. Chemical desiccation did not have any negative effect on the physiological quality of the seeds.

【 授权许可】

Unknown