Competitividade de cultivares de arroz irrigado com cultivar simuladora de arroz-vermelho

Balbinot, Alvadi Antônio; Fleck, Nilson Gilberto; Menezes, Valmir Gaedke; Agostinetto, Dirceu

doi:10.1590/s0100-204x2003000100007

Cited by 19 publications

(15 citation statements)

References 19 publications

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“…The ability to suppress the growth of weeds is relevant to reduce the weed seed bank in the soil. Unlike what was observed in other studies conducted with rice (BALBINOT JR. et al, 2003a), corn (BEGNA et al, 2001), soybean (BIANCHI et al, 2006) and wheat (LEMERLE et al, 2001), the percentage of soil coverage by common bean plants and the plant height did not estimate consistently the competitive ability of black common bean genotypes. Probably roots characteristics of common bean genotypes influence the competitiveness against weeds, as discussed by Cury et al (2013).…”

Section: Resultscontrasting

confidence: 88%

“…The ability of soil covering by crops at the begi nning of the devel opment is an impor tant characteristic to reduce the light availability to weeds that are established in rows or inter-rows (CALLAWAY, 1992;BALBINOT JR. et al, 2003a;LAMEGO et al 2005). The dense canopy of cultivated plants with high soil covering reduces the quantity and quality of light available to weeds, reducing the net photosynthesis of these plants and, consequently, its competitiveness for water, light and nutrients (BALBINOT JR. et al, 2003b).…”

Section: Resultsmentioning

confidence: 99%

“…The morphophysiological characteristics of crop plants define its competitive ability (BALBINOT JR. et al, 2003a). There is a lack of research to quantify the effects of plant characteristics on the competitive ability of crops (NI et al, 2000;LAMEGO et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…Researches conducted with rice (BALBINOT JR. et al, 2003a;BALBINOT JR. et al, 2003b), wheat (LEMERLE et al, 2001), maize (BEGNA et al, 2001.;FLECK, 2005) and soybean (FLECK, VERBEEK;ORCHARD, 2007) indicate that the growth rate is the key factor to increase crop competitiveness with weeds. The early establishment of plants confers advantage in the use of environmental resources.…”

Section: Introductionmentioning

confidence: 99%

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Competitive ability of black common bean genotypes with weeds

et al. 2013

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The morpho-physiologic characteristics of common bean plants can affect their competitive ability with weeds. The objective of this work was to evaluate the competitive ability of black bean genotypes with weeds. An experiment was carried out in the 2010/ 11 cropping season in Papanduva, SC, southern Brazil, in order to verify the variability of some plant characteristics among genotypes of common bean. The randomized block design was used, with four replications. Seven cultivars underwent the treatments: BRS Campeiro, CHP 01-238, CHP 01-239, Diamante Negro, BRS Supremo, BRS Valente, IPR Uirapuru, FTS Soberano, IPR Graúna, IPR Tiziu e IAC Diplomata. At 6, 14, 18, 25 and 32 days after emergence (DAE) were evaluated plant height, ground cover by common bean plants, dry biomass of stems and leaves, and grain yield. In the 2011/12 cropping season the same cultivars were grown in the presence or absence of weeds, adopting similar methodology to the 2010/11. The losses of grain yield in black common bean genotypes due to weed interference ranged from 30.8% to 54.9%. There was a positive correlation between yield reduction promoted by the weed infestation and dry biomass produced by the weeds. In addition, there was a positive correlation between percentage of yield reduction due to the weed infestation and grain yield without weed interference. The characteristics evaluated did not estimate the competitive ability of black common bean genotypes with weeds. Index terms:Phaseolus vulgaris, weed interference, grain yield. RESUMOAs características morfofisiológicas de plantas de feijão podem afetar a habilidade competitiva com plantas daninhas. Neste trabalho, objetivou-se avaliar a competitividade de genótipos de feijão do grupo "Preto" com plantas daninhas. Inicialmente, foi conduzido um experimento na safra 2010/11 em Papanduva, SC, para verificar a variabilidade entre genótipos de feijão-preto quanto a algumas características da planta. Foi utilizado o delineamento experimental de blocos casualizados, com quatro repetições. Os tratamentos foram constituídos pelos seguintes genótipos: BRS Campeiro, CHP 01-238, CHP 01-239, Diamante Negro, BRS Supremo, BRS Valente, IPR Uirapuru, FTS Soberano, IPR Graúna, IPR Tiziu e IAC Diplomata. Aos 6, 14, 18, 25 e 32 dias após a emergência (DAE) foram determinadas altura das plantas, cobertura do solo pelas plantas de feijão, massa seca de hastes e folhas e, ao final do ciclo, a produtividade dos grãos. Na safra 2011/12, os mesmos genótipos foram avaliados na presença ou ausência de plantas daninhas, adotando metodologia similar à da safra 2010/11. As perdas de produtividade de grãos dos genótipos de feijão avaliados, em razão da interferência de plantas daninhas, variaram de 30,8 a 54,9%. Houve correlação positiva entre porcentagem de redução de produtividade em razão da infestação e a massa seca acumulada pelas plantas daninhas. Também houve correlação positiva entre porcentagem de redução de produtividade em função da interferência de plantas daninhas e a produtividade sem ...

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Section: Resultscontrasting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Competitive ability of black common bean genotypes with weeds

et al. 2013

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“…Weed competition results in decreasing crop yields, as reported in flooded rice (Balbinot Jr. et al, 2003;Agostinetto et al, 2007) and soybean (Steckel & Sprague, 2004;Nepomuceno et al, 2007). These yield losses vary according to the population of weeds, area distribution, emergence flows, and the size of the individuals due to the time of emergence in relation to the crop.…”

Section: Introductionmentioning

confidence: 96%

Competition periods of crabgrass with rice and soybean crops

et al. 2014

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-Determining the periods of weed competition with crops helps the producer to choose the most appropriate time to use weed control practices. This strategy allows for the reduction of the number of herbicide applications, reducing costs and the environmental impact of pesticides. The objectives were to determine the period before the interference (PBI) of crabgrass (Digitaria ciliaris) competing with flooded rice, the critical period of interference prevention (CPIP) of crabgrass with soybean and the effects of competition on the grains yield and their components. Experiments were conducted with the coexistence of BRS Querência rice cultivar with crabgrass, for periods of 0, 7, 14, 21, 28, 35, and 110 days after emergency (DAE) and Fundacep 53RR soybean cultivar, whose periods of coexistence and control of crabgrass were 0, 7, 14, 21, 28, 35, and 156 DAE. Rice can grow with crabgrass infestation until 18 DAE, while soybean should remain free from the presence of crabgrass in the period between 23 and 50 DAE. The grain yield and its components, in the crops studied, are affected when grown with crabgrass. BRS Querência, com milhã, por períodos iniciais crescentes de 0, 7, 14, 21, 28, 35 Keywords: Digitaria ciliaris, Oryza sativa, Glycine max, interference RESUMO -A determinação dos períodos de competição das plantas daninhas com as culturas auxilia o produtor na escolha do momento mais adequado para utilizar medidas de manejo. Essa estratégia possibilita reduzir o número de aplicações de herbicidas, com consequente redução de custo e menor impacto dos agrotóxicos ao ambiente. Assim, os objetivos deste trabalho foram determinar o período anterior à interferência (PAI) de milhã (Digitaria ciliaris) na cultura do arroz irrigado, o período crítico de prevenção à interferência (PCPI) de milhã na cultura da soja e os efeitos da competição na produtividade de grãos e seus componentes. Para isso, foram conduzidos experimentos de convivência de arroz irrigado, cultivar

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Allelopathy: driving mechanisms governing its activity in agriculture

Trezzi

Vidal

Balbinot

et al. 2016

Journal of Plant Interactions

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Allelopathy determines the dynamics of plant species in different environments. Understanding this biological phenomenon could help to develop applications in both natural and agricultural systems. This review summarizes the genetic and environmental characteristics that control the production and release of allelochemicals in agroecosystems. This study highlights the current understanding of the environmental changes caused by allelochemicals and summarizes the knowledge about the mechanisms of action of these compounds. Finally, it reviews novel applications of allelopathy in agricultural production systems, including the role of allelochemicals in consortia and their potential use in no-tillage cropping systems through cover crops or mulches.ARTICLE HISTORY

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Competitividade de cultivares de arroz irrigado com cultivar simuladora de arroz-vermelho

Cited by 19 publications

References 19 publications

Competitive ability of black common bean genotypes with weeds

Competitive ability of black common bean genotypes with weeds

Competition periods of crabgrass with rice and soybean crops

Allelopathy: driving mechanisms governing its activity in agriculture

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