Dinâmica de plantas daninhas após aplicação de oxadiazon com simulação de lâminas d'água e incorporação de material orgânico.

Mendes, Kassio F.; Reis, Ronaldo M.; dos Reis, Marcelo R.; da Silva, Remon R.; de Almeida, Wellington L.; Inoue, Miriam H.

The objective of this work was to determine the effect of o×adiazon in the behavior of the weed community under different moments of application of water depths and incorporation of organic material. A randomized block design was used with treatments arranged in a factorial 5 × 2 with four replications. The treatments consisted of combination of with or without incorporation (8 t ha-1) of organic material in the soil and the moments of application of water depths (0, before 10 mm, after 10 mm, and sequential 10 mm before and after application of o×adiazon), and the control (0 mm water and 0 g ha-1 of o×adiazon). Relative density, relative frequency, relative abundance, importance value inde× (IVI) and similarity inde× (SI) of the weed flora were obtained. No significant interaction between the organic material and water depths was observed. Cyperus rotundus showed higher IVI, regardless of the e×perimental treatment, followed by Urochloa decumbens, Galinsoga parviflora, Bidens pilosa and Melampodium perfoliatum. The highest similarity (SI = 0.75) was observed between treatments with the application of 10 mm water depth before associated with the 10 mm after the application of o×adiazon.

WEEDS; OXADIAZON; CARBON content of water; ORGANIC compounds; PLANT communities; SPECIFIC gravity; IRRIGATION

Brazilian Journal of Agricultural Sciences / Revista Brasileira de Ciências Agrárias, 2014, Vol 9, Issue 1, p65

1981-1160

Academic Journal

10.5039/agraria.v9i1a3679