Competitividade relativa de soja com arroz-vermelho

Moraes, Pedro Valério Dutra de; Agostinetto, Dirceu; Galon, Leandro; Rigoli, R.P.

doi:10.1590/s0100-83582009000100006

Cited by 18 publications

(29 citation statements)

References 15 publications

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“…This behavior is again the result of increased intraspecific competition, especially for barnyardgrass. Thus, several replacement series studies have reported that, in some cases, the intraspecific competition seems to be more important than the interspecific one, because plants of the same species basically exploit the same ecological niche, competing for the same resources in time and/ or space (Dias et al 2010;Moraes et al 2009;Rigoli et al 2008). The analysis of the physiological parameters shows that the higher relative growth of the weed at the lowest proportion (25%), previously presented by morphological variables (Figure 1; Table 1,2), is due, in part, to the increased photosynthetic activity and related variables (Table 3).…”

Section: Resultsmentioning

confidence: 99%

“…Studies in substitutive series have found that usually crops have higher competitive ability than weeds (Agostinetto et al 2013;Galon et al 2014;Moraes et al 2009). This behavior is explained by the fact that the negative effect of weeds is not restricted by the largest individual competitive ability, but mainly due to the level of infestation in the area (Vilà et al 2004).…”

Section: Introductionmentioning

confidence: 99%

“…Research using replacement series studies has shown that soybean crop has competitive advantage in relation to weeds, grasses and broadleaves (Bianchi et al 2006;Dias et al 2010;Moraes et al 2009;Wandscheer and Rizzardi 2013). However, the results for barnyardgrass have shown that this weed usually has competitive advantage in relation to irrigated rice cultivars Aminpanah et al 2012;Gealy et al 2005), and this response is attributed to the high morphophysiological similarity between the species.…”

Section: Introductionmentioning

confidence: 99%

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Relative competitiveness of soybean cultivars with barnyardgrass

et al. 2016

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ABSTRACT:The aim of this work was to evaluate the competitiveness between soybean cultivars and barnyardgrass, based on morphological and physiological characteristics of species. The experiments were conducted in completely randomized experimental design, with 4 replications. therefore, the ability of one species to interfere on another is equivalent.For plant height, barnyardgrass displays higher competitiveness compared to BMX Apolo RR, with early cycle and short height. The intraspecific competition is more important to barnyardgrass than interspecific competition with soybean cultivars, resulting in negative effects on the morphological and physiological characteristics of species.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Relative competitiveness of soybean cultivars with barnyardgrass

et al. 2016

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“…In the 50:50 and 25:75 ratios, soybean showed greater leaf area, LDM, SDM, and TDM, compared with the soybean growing in the 75:25 ratio and as a monocrop (100:0). The competition of soybean with red rice also showed the same trend in the increase of the variables leaf area and dry matter of soybean when in interspecific competition (MORAES et al, 2009).…”

Section: Resultsmentioning

confidence: 56%

Development stages horseweed in soybeans competition

2018

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The objective of this study was to evaluate the relative competitive ability of soybean with different development stages of hairy fleabane. Two experiments were conducted in greenhouse, in a completely randomized design. In the experiment it was tested soybean and hairy fleabane competition at different stage of development (rosette and 15 cm height) at the proportions 100:0, 75:25, 50:50, 25:75 and 0:100, and total plant population was 315 plant m-2. The variables evaluated were plant height, leaf area, and shoot dry matter (leaves and stems). Competitive analysis was performed by diagrams and interpreting the competitiveness index. The soybean has greater competitive ability that horseweed for both development stages. The intraspecific competition is more intense for soybean when in hairy fleabane rosette stage, and the competitive relations are equivalent between soybean and hairy fleabane of 15 cm tall. The both hairy fleabane stages were injured in the soybeans competition.

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“…Quando não controladas, as plantas daninhas podem reduzir o rendimento de grãos em até 90 %, devido à competição exercida pelas espécies infestantes, além de promover o aumento da altura e acamamento de plantas (MORAES et al, 2009). A intensidade da interferência da comunidade infestante sobre a cultura comercial, normalmente, é medida pelos efeitos negativos sobre a produtividade, que estão relacionados a fatores ligados à cultura, à comunidade infestante e ao ambiente.…”

Section: Introductionunclassified

Interferência de tiririca (Cyperus rotundus L.) e da Compactação do Solo no Crescimento do Feijão-Caupi

Pessôa¹,

Terceiro²,

Souza³

et al. 2015

Revista Verde

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RESUMO -As plantas daninhas interferem no crescimento e desenvolvimento da cultura do feijão-caupi, podendo reduzir drasticamente a sua produtividade. Objetivou-se com o trabalho, avaliar a interferência de Cyperus rotundus e da compactação do solo no crescimento do feijão-caupi [Vigna unguiculata (L.) Walp] no sertão paraibano. O experimento foi realizado em estufa agrícola no Centro de Ciências e Tecnologia Agroalimentar da Universidade Federal de Campina Grande, CCTA/UFCG, Campus de Pombal-PB. As unidades experimentais foram compostas por vasos com capacidade de 6 litros. Utilizou-se o delineamento inteiramente casualizado com tratamentos distribuídos em esquema fatorial 3 x 2 , sendo os fatores três populações de C. rotundus (0, 2 e 3 tubérculos por vaso) e dois níveis de compactação (solo sem compactação e solo com subsuperfície compactada), com quatro repetições. Foram coletados os dados de produção de fitomassa, área foliar, altura da planta, número de folhas e diâmetro do caule, os quais foram submetidos à análise da variância e teste de médias. A presença de C. rotundus, independente de sua população prejudicou os componentes de crescimento, reduzindo a área foliar, de forma mais intensa do que a compactação do solo. Com isto, urgem medidas que reduzam os prejuízos causados por C. rotundus a cultura do feijão-caupi. Palavras-chave: Vigna unguiculata (L.) Walp, competição, crescimentoABSTRACT -Weeds interfere with the growth and development of the cowpea crop and can dramatically reduce their productivity. The objective of this study was to evaluate the interference of nut grass and soil compaction in the growth of cowpea [Vigna unguiculata (L.) Walp]. The experiment was conducted in an agricultural greenhouse in the Science and Technology Center of Agrifood Federal University of Campina Grande, CCTA/UFCG, Campus de Pombal-PB, Brazil. The experimental were composed of pots with 6 liters capacity. Used a completely randomized design with treatments distributed in a factorial 3 x 2 x 4, comprising the three populations of C. rotundus (0, 2 and 3 tubers per pot) and two compression levels (soil without compaction and soil compacted subsurface), with four replications. Were collected biomass production data, leaf area, plant height, leaf number and stem diameter, which were submitted to analysis of variance and mean test when necessary. The presence of C. rotundus, regardless of its population hampered growth components, reduced leaf area, more intensely than soil compaction. With this, urge measures to reduce the harm caused by C. rotundus the cowpea.

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Competitividade relativa de soja com arroz-vermelho

Cited by 18 publications

References 15 publications

Relative competitiveness of soybean cultivars with barnyardgrass

Relative competitiveness of soybean cultivars with barnyardgrass

Development stages horseweed in soybeans competition

Interferência de tiririca (Cyperus rotundus L.) e da Compactação do Solo no Crescimento do Feijão-Caupi

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