INTERFERÊNCIA DE PLANTAS DE COBERTURA SOBRE A INCIDÊNCIA DE PLANTAS INVASORAS E A PRODUÇÃO DE CEBOLA SOB SISTEMA DE PLANTIO DIRETO INTERFERENCE OF COVER CROPS ON THE WEED'S INCIDENCE AND ONION YIELD UNDER NO-TILLAGE

摘要: 8 ABSTRACT Even with expectations of expanding Brazilian agricultural areas under no-tillage system, there are few studies that focus this system yield without application herbicide to weeds control not very significant, mostly for vegetables production, like onions. In sense, the use cover crops presents efficient in development inhibit by a physical barrier and/or its allelopathic effects. This study aimed evaluate influences and onions agroecological transition system. The experimental area is located Experimental Station Epagri, Ituporanga (SC), Humic Haplumbrept soil. Treatments were: T1: - weed community; T2: oat (Avena strigosa); T3: rye (Secale cereale); T4: white radish (Raphanus sativus); T5: intercropped rye; T6: oat. treatments Raphanus sativus + Secale cereale at 60 days after sowing 120 propitiated highest dry matter crops, while lowest was obtained cereale, followed early season onion. onion bulbs class 3 (50mm≤ᶲ˂70mm) total, compared control, also these two treatments. Key-words: green manure, soil ecological management, Allium cepa.