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Allelopathic potential of cover crops in control of shrubby false buttonweed (Spermacoce verticillata). Repositório Alice
VARGAS, L. A.; PASSOS, A. M. A. dos; KARAM, D..
Searching for alternatives to deal with weeds without the exclusive use of herbicides can increase the sustainability of agricultural production in the Amazon region. This study aimed to evaluate the allelopathic potential of cover crops on the weed shrubby false buttonweed (Spermacoce verticillata L.). Three straw levels (1; 2.5 and 5 mg cm-2) of thirteen cover crops (Cajanus cajan, Canavalia ensiformis, Crotalaria juncea, C. ochroleuca, C. spectabilis, Mucuna aterrima, M. cinereum, Pennisetum glaucum, Sorghum bicolor, S. sudanense, Urochloa brizanha cv. Xaraés, U. brizantha cv. Piatã and U. ruziziensis) were assessed on germination and initial growth of weed and lettuce. We carried out two experiments (weed and lettuce) in a factorial scheme (cover crops...
Tipo: Artigo de periódico Palavras-chave: Método sanduíche; Alelopatia; Erva Daninha; Vassourinha; Planta de Cobertura; Leguminosa; Palha.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1095052
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Soil seed bank phytosociology in no-tillage systems in the Southwestern Amazon Region. Repositório Alice
VARGAS, L. A.; PASSOS, A. M. A.; MARCILIO, V. A.; BRUGNERA, F. A.; LEITE, V. P. D.; COSTA, R. S. C..
Understanding the ecological dynamics of weed populations in no-tillage systems is important to establish strategies for integrated weed control capable of increasing agroecosystem sustainability. This study sought to evaluate the effect of succession systems on the seed bank in a no-tillage system. The effects of fifteen succession systems, composed of seven grasses, seven Leguminosae , and a fallow condition, were evaluated on the seed bank at two soil depths (0 to 10 and 10 to 20 cm). The species found in the seed bank were quantified and identified by species and family. The precision of sampling, density, dominance, the indices of diversity of Simpson and Shannon-Weiner; index of sustainability; analysis of groupings of dissimilarities; and the value...
Tipo: Artigo de periódico Palavras-chave: Fitossociologia; Sorghum sudanense; Plantio direto.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1083035
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