PLANTAS DE COBERTURA NA ENTRESSAFRA NO MANEJO DE PLANTAS DANINHAS EM ÁREA DE PLANTIO DIRETO

Fernando Couto de Araújo; Adriano Stephan Nascente; Juliana Lourenço Nunes Guimarães; Vinícius Silva Sousa; Marco Antônio Moreira de Freitas; Fenelon Lourenço de Sousa  Santos

doi:10.1590/1983-21252021v34n106rc

Authors

Fernando Couto de Araújo School of Agronomy, Universidade Federal de Goiás, Goiânia, GO https://orcid.org/0000-0002-4455-4596
Adriano Stephan Nascente National Research Center for Rice and Beans, Embrapa Arroz e Feijão, Santo Antônio de Goiás, GO https://orcid.org/0000-0002-6014-3797
Juliana Lourenço Nunes Guimarães Departament of Plant Protection, Instituto Federal Goiano, Urutaí, Goiás https://orcid.org/0000-0002-3056-0178
Vinícius Silva Sousa School of Agronomy, Universidade Federal de Goiás, Goiânia, GO https://orcid.org/0000-0002-5387-4997
Marco Antônio Moreira de Freitas Departament of Plant Protection, Instituto Federal Goiano, Urutaí, Goiás https://orcid.org/0000-0001-6718-4906
Fenelon Lourenço de Sousa Santos School of Agronomy, Universidade Federal de Goiás, Goiânia, GO https://orcid.org/0000-0001-8297-6987

DOI:

https://doi.org/10.1590/1983-21252021v34n106rc

Keywords:

Weeds. Phytosociological survey. Integrated management. Cultural control. Sustainable management.

Abstract

Cover crops can provide suppression of weeds and together with chemical control make the proper management of weeds in agricultural areas. The objective of this study was to evaluate the effect of cover crop cultivation during the off-season on weed development in a no-tillage area. The experimental design was in randomized blocks scheme with six treatments and four replications. The treatments were: fallow (control), millet (Pennisetum glaucum) + crotalaria (Crotalaria spectabilis + C. juncea + C. ochroleuca), millet + pigeon pea (Cajanus cajans), millet + Urochloa ruziziensis, millet + Urochloa ruziziensis + pigeon pea and millet + buckwheat (Fagopyrum esculentum. The evaluations were done at 30, 75 and 225 days after sowing of the cover crops (DAS). The main growth weed species in the area were Cenchrus echinathus, Euphorbia heterophylla and Digitaria insularis. Fallow treatment showed greater number of weed species with density of 184 plants m^-2, 9.0 species and with 527.8 g m^-2 of dry matter mass at 225 DAS. In all treatments verified reduction in the density and mass of weeds dry matter compared to the fallow, with average of 30 plants m^-2, 5.8 species and 7.9 g m^-2 at 225 DAS, respectively. The use of cover crops is an important strategy for weed control in agricultural areas.

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