Eficiência nutricional de cultivares de feijão em competição com plantas daninhas

Cury, J.P.; Santos, J.B.; Silva, E.B; Braga, Renan Rodrigues; Carvalho, Frédéric A.; Silva, D Valadão; Byrro, E.C.M.

doi:10.1590/s0100-83582013000100009

Cited by 17 publications

(20 citation statements)

References 25 publications

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“…This fact was observed for most treatments in which soybean was cultivated with B. pilosa and U. decumbens. Nitrogen and potassium are two elements high extracted by weed (Kabba, Knight, & Rees, 2011;Cury et al, 2013), being a strong competing for these elements.…”

Section: Resultsmentioning

confidence: 99%

<b>Mycorrhizal association in soybean and weeds in competition

et al. 2016

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ABSTRACT. The purpose of this study was to evaluate the effects of mycorrhizal association on the interference of Bidens pilosa, Urochloa decumbens and Eleusine indica on soybean culture in two conditions: a) plants competing without contact with roots of another species; b) with contact between roots. At 60 days after planting, growth, nutrient accumulation and mycorrhizal colonization of soybean and weeds were evaluated. The contact between roots of soybean plant and weed species increased the negative interference effects for both species, with less growth and nutrient accumulation. With the individualization of roots, higher competition occurred for soil resources up to 60 days of coexistence between species. In competition with soybean, Bidens pilosa and Urochloa decumbens stood out in accumulation of most nutrients without differing from when cultivated in monocultivation. The increase of the soybean mycorrhizal colonization was 53, 40 and 33% when in competition with Urochloa decumbens, Eleusine indica and Bidens pilosa species, respectively. A positive interaction occurred for soybean mycorrhizal colonization and competing plants irrespective of weed species or root contact. Keywords: Bidens pilosa, Urochloa decumbens (Syn. Urochloa decumbens), Eleusine indica, arbuscular mycorrhiza fungi.Associação micorrízica em soja e plantas daninhas em competição RESUMO. Objetivou-se neste trabalho avaliar os efeitos da associação micorrízica na interferência de Bidens pilosa, Urochloa decumbens e Eleusine indica sobre a cultura da soja em duas condições: a) plantas competindo sem contato entre raízes de outra espécie b) com contato entre raízes. Aos 60 dias após o plantio, foram feitas avaliações do crescimento, acúmulo de nutrientes e colonização micorrízica da soja e plantas daninhas. O contato entre as raízes de plantas de soja e das espécies daninhas aumentou os efeitos negativos da interferência para ambas às espécies, com menor crescimento e acúmulo de nutrientes. Com a individualização das raízes, maior competição estabeleceu-se pelos recursos do solo até os 60 dias de convivência entre cultura e espécie competidoras. Em competição com a soja, B. pilosa e U. decumbens destacaram-se no acúmulo da maioria dos nutrientes não diferindo de quando cultivadas em monocultivo. O aumento da colonização micorrízica da soja foi de 53, 40 e 33 % quando em competição com U. decumbens, E. indica e B. pilosa, respectivamente. Ocorreu interação positiva para a colonização micorrízica da soja e das plantas competidoras independente da espécie daninha e do contato entre as raízes. Palavras-chave:Bidens pilosa, Urochloa decumbens, Eleusine indica, fungo micorrízico arbuscular.

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Section: Resultsmentioning

confidence: 99%

<b>Mycorrhizal association in soybean and weeds in competition

et al. 2016

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“…This occurred due to the high density of weeds in the experimental area, an average of 101 and 17 plants m -2 monocots and dicots, respectively, evaluated at 14 DAE, and due to low competitive ability of common bean (PROCOPIO et al, 2004a;CURY et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

“…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: Resultsmentioning

confidence: 99%

“…This is partly due to the lack of herbicides with high efficiency and low toxicity to the crop. Additionally, the common bean crop has low competitive ability with weeds for water, nutrients and light (PROCOPIO et al, 2004a;CURY et al, 2013). In general, the modern cultivars of common bean have low plant height, about 70 cm, increasing the susceptibility to light competition.…”

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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“…The authors demonstrated that the critical period (4 to 18 days after emergence) for the early-maturing Carioca Precoce cultivar was shorter than the one observed for late-maturing cultivars. Additionally, Cury et al (2013) reported that IPR-Colibri, another early-maturing cultivar, was less tolerant to weed competition than two other common bean cultivars.…”

Section: Key-wordsmentioning

confidence: 99%

Weed management and its relation to yield and seed physiological potential in common bean cultivars

Costa

Barbosa

Sá

2013

Pesqui. Agropecu. Trop.

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Common bean is an important crop in Brazil primarily because of its nutritional characteristics. Some agronomic practices, such as weed management, are fundamental to cultivation, as a means of obtaining a high crop yield. However, some studies have shown that weed management may alter the function of the cultivar cycle. Thus, this study aimed at determining the optimal phenological stage in early-maturing common bean cultivars to perform the weed control without providing reductions in yield and seed quality. The experimental design was randomized blocks with 20 treatments and four replications, in a 2×2×5 (cultivars × types of weed control × periods of weed control) factorial scheme. The periods of weed control for both cultivars (Carioca Precoce and IPR-Colibri) consisted of full cycle weeded (control), weed control at the V4-3 stage (first three nodes on the main stem with trifoliate leaves), at the R5 stage (beginning of bloom) and at the R8 stage (appearance of pods) and full cycle unweeded (no weed control). The types of weed control used were chemical (fluazifop-p-butyl + fomesafen) and mechanical (hoe). The Carioca Precoce cultivar demonstrated higher agronomic performance and yield than the IPR-Colibri cultivar, although the IPR-Colibri seeds had a higher vigor. The type of weed control (chemical or mechanical) did not affect the agronomic characteristics, yield and seed physiological potential of the cultivars. The ideal period for weed control in early-maturing common bean cultivars to obtain a higher yield and seed physiological potential was observed at the V4-3 phenological stage.

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Eficiência nutricional de cultivares de feijão em competição com plantas daninhas

Cited by 17 publications

References 25 publications

<b>Mycorrhizal association in soybean and weeds in competition

<b>Mycorrhizal association in soybean and weeds in competition

Competitive ability of black common bean genotypes with weeds

Weed management and its relation to yield and seed physiological potential in common bean cultivars

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