Interference of cover crops on the weeds incidence and onion yield under no-tillage [Interferência De Plantas De Cobertura Sobre A Incidência De Plantas Invasoras E A Produção De Cebola Sob Sistema De Plantio Direto]
De Camargo Vilanova C.,Federal University of Santa Catarina |
Comin J.J.,Federal University of Santa Catarina |
Kurtz C.,Pesquisador da Empresa de Pesquisa Agropecuaria e Extensao de Rural de Santa Catarina EPAGRI |
Junior V.M.,Federal University of Santa Catarina |
And 6 more authors.
Scientia Agraria | Year: 2014
Even with expectations of expanding Brazilian agricultural areas under no-tillage system, there are few studies that focus this system of yield without application of herbicide to weeds control are not very significant, mostly for vegetables production, like onions. In this sense, the use of cover crops presents efficient in weeds development control to inhibit by a physical barrier and/or its allelopathic effects. This study aimed to evaluate cover crops influences in the weeds control and onions yield under agroecological transition no-tillage system. The experimental area is located in Experimental Station of Epagri, Ituporanga (SC), in a Humic Haplumbrept soil. Treatments were: T1: control-weed community; T2: oat (Avena strigosa); T3: rye (Secale cereale); T4: white radish (Raphanus sativus); T5: white radish intercropped with rye; T6: white radish intercropped with oat. The treatments Raphanus sativus + Secale cereale at 60 days after sowing and Raphanus sativus + Secale cereale at 120 days after sowing propitiated highest dry matter yield of cover crops, while the lowest dry matter yield of weeds was obtained in treatments Raphanus sativus + Secale cereale, followed by Raphanus sativus in the early season onion. The highest yield of onion bulbs of the class 3 (50mm70mm) and total, compared to the control, was also obtained in these two treatments.