Cadastramento fitossociológico de plantas daninhas na bananicultura

Gomes, Giovanna Larissa Gimenes Cotrick; Ibrahim, F.N.; Macedo, G.L.; Nóbrega, Lídia Pinheiro da; Alves, Elza

doi:10.1590/s0100-83582010000100008

Cited by 29 publications

(34 citation statements)

References 11 publications

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“…Of the four species observed in the intercrop in the Fall, three were also present in the monocrop in that same season (Table 1). Gomes et al (2010) found no similarity by the Sørensen's index between infestation composition in two areas of banana plantation grown on distinct soil types. The authors remark that the weed species with higher importance value are those less affected by the weed management practice applied.…”

Section: Similaritymentioning

confidence: 81%

Infestation of weed species in monocrop coffee or intercropped with banana, under agroecological system

et al. 2014

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-We aimed with this study to compare weed infestation in coffee under two different cropping managements: conventional coffee grown alone, or intercropped with banana plantation in a year-round basis (late spring, late summer, late fall and late winter). The experiment was installed in 2009 under field conditions at the Escola Municipal Rural Benedita Figueiró de Oliveira, in the city of Ivinhema in the state of Mato Grosso do Sul, Brazil. Assessments of weed occurrence were made three years after employment, on both cropping systems, and density, frequency, dominance and the importance value for each plant species in each system and season were quantified. Plant diversity within each system was estimated by Simpson and Shannon-Weiner indexes. Similarity between cropping systems were also assessed by the binary asymmetric similarity coefficient of Jaccard. Absolute infestation and spontaneous species differed between the two cropping systems in all seasons. Overall species diversity is higher in the monocrop compared with the intercrop, and it is associated in this study with the higher incidence of troublesome species. Areas were similar in terms of weed composition only in the Fall. Shading provided by the banana trees shows to be an efficient culture management aiming to suppress weeds in agro-ecological planting systems.Keywords: weed occurrence, intercrops, phytosociology. RESUMO -Objetivou-se com este trabalho comparar a infestação de plantas daninhas em café sob dois manejos de cultivo diferentes: café convencional cultivado isoladamente (solteiro) e em consórcio com banana (final da primavera, fim do verão, outono e final do inverno). O experimento foi instalado em 2009, em condições de campo, na Escola Municipal Rural

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Section: Similaritymentioning

confidence: 81%

Infestation of weed species in monocrop coffee or intercropped with banana, under agroecological system

et al. 2014

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“…Estudos fitossociológicos permitem avaliar a composição de espécies de um dado dossel vegetal e estimar a abundância (ou densidade), frequência e dominância (ou cobertura) de determinada comunidade vegetal. Com esses parâmetros sinecológicos também é possível estimar a importância relativa de cada espécie na área e, assim, prever danos às culturas que serão semeadas, provocados por cada fração da infestação (Gomes et al, 2010).…”

Section: Introductionunclassified

Cultivos de outono-inverno na supressão de plantas daninhas em soja

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Ceccon

Marques

et al. 2015

Agraria

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RESUMOVários fatores reduzem a produtividade das culturas, como a incidência de plantas daninhas cuja supressão pode ser alcançada com rotação de culturas. Objetivou-se analisar a composição da comunidade infestante na soja após um e três anos de distintas sucessões de cultivo. A soja foi cultivada anualmente (outubro a fevereiro) sobre os seguintes tratamentos de outono-inverno: Milho 90 cm entrelinhas; Milho 45 cm entrelinhas; Milho 90 cm com B. ruziziensis; B. ruziziensis; Feijão-caupi. As avaliações foram realizadas 15 dias após a emergência da soja. Após três anos, os tratamentos apresentaram aumento de infestação em relação ao primeiro ano, onde a planta daninha mais importante foi B. pilosa, que após três anos foi parcialmente substituída por L. nepetifolia e E. heterophylla. Maiores coeficientes de diversidade estiveram associados a maiores níveis de infestação, pois as novas espécies observadas se somaram às presentes. A. hybridus foi a espécie mais persistente, presente em ambos os anos de estudo. A braquiária contribuiu para menor infestação, e os cultivos de milho a 90 cm e feijão caupi proporcionaram aumento no nível de infestação.Palavras-chave: Consórcio, infestação, manejo, sucessão de cultivos Weed suppression with brachiaria in soybean crop ABSTRACTSeveral factors reduce crop yield, including weed occurrence, which can be suppressed by crop rotation. We aimed with this study to analyze the composition of the weedy community after one and three years of distinct crop successions. Soybean was annually planted between October and February in areas previously cropped with one of the following treatments: maize planted in rows spaced in 45 or 90 cm; intercropping maize + Brachiaria ruziziensis; B. ruziziensis alone; and cowpea. Evaluations were carried out 15 days after soybean emergence. After three years, treatments tended to be more infested compared to the first year; the most important weed species was B. pilosa, which after three years was partially substituted by L. nepetifolia and E. heterophylla. Higher diversity coefficients were associated to higher infestation levels because new weed species joined while older species were not completely suppressed. A. hybridus was the most persistent one, being present in both years. Brachiaria planted in the second crop highly contributed for lower weed occurrence in the following soybean crop, and corn planted in rows spaced in 90 cm and cowpea promoted increased weed occurrence.

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“…With these data it is possible to rank species in terms of importance of infestation in each cropping system (Gomes et al, 2010), focusing management practices on the most important weed species. Coefficients of diversity also support inferences about the level of imbalance of a plant community, assisting in the determination of the main weed species responsible for the infestation.…”

Section: Introductionmentioning

confidence: 99%

Occurrence of weed species in Jatropha curcas intercropping systems

et al. 2014

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-This study aimed to evaluate the level of infestation by weed species in a consolidated Jatropha plantation, as a function of the plant species grown in interrows. The experiment was installed in 2006 at the district of Itahum, city of Dourados, state of Mato Grosso do Sul, Brazil, made possible through a partnership between Embrapa Western Agriculture and Paraiso Farm. Treatments consisted of (1) Jatropha in monocrop, with no plant at the interrrows; or the following plants cultivaded at the interrows of Jatropha: (2) Stylosanthes spp.; (3) Brachiaria ruziziensis; (4) Brachiaria ruziziensis + Stylosanthess pp.; (5) Brachiaria humidicola; (6) Panicum maximum cv. massai; (7) Cajanus cajan cv. anão; (8) Crotalaria spectabilis; (9) Crop rotation system 1 -(maize second crop -Crambe abyssinica -soybeanpeanut); and (10) Crop rotation system 2 -(cowpea -radish -maize -cowpea) conducted for two years. Phytosociological characterization of weed species was accomplished in 2011 based on the Ecological Approach. Estimations of relative abundance, frequency, dominance and Importance Value Index were obtained. Areas were also characterized by the diversity coefficients of Simpson and modified Shannon-Weiner, and then grouped by cluster analysis. Areas with low soil coverage resulted in higher infestation levels; crop rotation in the interrows of Jatropha produced a significant reduction in weed infestation, but the lowest infestation levels were observed when grasses were grown intercropped with Jatropha. Lower diversity coefficients were associated with occurrence of the most troublesome weed species. In the first years after planting Jatropha, species of Brachiaria or a crop rotation involving species with high mulching ability and whose biomass exhibit a high C:N ratio, should be established in the interrows to avoid problems with weeds infestation.Keywords: Jatropha crop, infestation, phytosociology. Palavras-chave: pinhão-manso, infestação, fitossociologia. RESUMO: Objetivou-se com este estudo avaliar o nível de infestação por plantas daninhas em uma plantação consolidada de pinhão-manso em função da espécie cultivada nas entrelinhas da cultura. O experimento foi instalado em 2006 no distrito de Itahum, cidade de Dourados, Estado de Mato Grosso do Sul, tendo sido viabilizado por uma parceria entre a Fazenda Paraíso e a Embrapa Agropecuária Oeste. Os tratamentos consistiram do cultivo solteiro (1) ou das seguintes espécies cultivadas nas entrelinhas da cultura: (2) Stylosanthes spp.; (3) Brachiaria ruziziensis; (4)Brachiaria

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Cadastramento fitossociológico de plantas daninhas na bananicultura

Cited by 29 publications

References 11 publications

Infestation of weed species in monocrop coffee or intercropped with banana, under agroecological system

Infestation of weed species in monocrop coffee or intercropped with banana, under agroecological system

Cultivos de outono-inverno na supressão de plantas daninhas em soja

Occurrence of weed species in Jatropha curcas intercropping systems

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