Efeitos da faixa de controle do capim-braquiária (Brachiaria decumbens) no desenvolvimento inicial de plantas de eucalipto

Toledo, Roberto; Filho, Ricardo Victória; Alves, Paulo Roberto Arruda; Pitelli, Robinson Antônio; Cadini, M.T.D.

doi:10.1590/s0100-83582000000300001

Cited by 26 publications

(34 citation statements)

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“…Studies on weeds in perennial crops have been conducted for several species, including forest species (Toledo et al, 2000a, b), fruit trees (Carvalho et al, 1993;Senarathne et al, 2003;Souza et al, 2003;Yanagizawa & Maimoni-Rodella, 1999), and other types of crops (Aguilar et al, 2003;Ronchi et al, 2003;Santa-Cecília et al, 1997;DeFrank & Clement, 1995). Such studies have evaluated the floristic composition of weeds (Souza et al, 2003;Yanagizawa & Maimoni-Rodella, 1999), their influence on nutrient accumulation by the crop (Ronchi et al, 2003), the incidence of pests (Santa-Cecília et al, 1997), initial plant development (Toledo et al, 2000a, b) and their effect on crop yield (Carvalho et al, 1993;DeFrank & Clement, 1995;Senarathne et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

“…Such studies have evaluated the floristic composition of weeds (Souza et al, 2003;Yanagizawa & Maimoni-Rodella, 1999), their influence on nutrient accumulation by the crop (Ronchi et al, 2003), the incidence of pests (Santa-Cecília et al, 1997), initial plant development (Toledo et al, 2000a, b) and their effect on crop yield (Carvalho et al, 1993;DeFrank & Clement, 1995;Senarathne et al, 2003). When not controlled, weeds reduce the initial growth of perennial plants, negatively influencing stem diameter and height (Toledo et al, 2000a, b), nutrient content (Ronchi et al, 2003) and crop yield (Carvalho et al, 1993;Senarathne et al, 2003). In orchards, weeds cause additional problems since operations such as pruning, fertilization, and fruit harvesting and collecting sometimes become more difficult (Senarathne et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

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Floristic composition and growth of weeds under custard apple (Annona squamosa) progenies

Silva¹,

Barbosa

Oliveira³

et al. 2004

Planta daninha

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-Weeds have a negative influence on several fruit tree characteristicsKey words: Annona squamosa, custard apple fruit, weeds. RESUMO -As plantas daninhas (PD) afetam várias características das fruteiras, inclusive orendimento, e podem dificultar a execução de tratos culturais nos pomares. Existe interesse em métodos alternativos de manejo das PD, visando reduzir o uso de herbicidas, que são caros e causam degradação ambiental. Dentre esses métodos, a adoção de cultivares com maior habilidade competitiva com as PD tem despertado atenção internacional. O objetivo do trabalho foi avaliar a composição florística e o crescimento de PD sob a copa de progênies de pinheira irrigadas. Vinte progênies de meias-irmãs, com idade aproximada de três anos, foram avaliadas no delineamento de blocos ao acaso, com cinco repetições e quatro plantas por parcela. Ao redor do caule de cada planta estabeleceu-se um círculo com área de 0,5 m 2 . Nessa área, foram avaliadas a composição e as massas das matérias fresca e seca da parte aérea das PD. Avaliaram-se também os diâmetros do colo e da copa e a área da folha das progênies. Ocorreram 58 espécies de PD. As famílias com maior número de espécies, em ordem decrescente, foram Leguminosae, Convolvulaceae, Euphorbiaceae, Malvaceae e Sterculiaceae. O número de espécies de PD/parcela variou de 6 a 18, porém não houve diferença entre a porcentagem média de diferentes PD sob a copa das progênies. As menores massas de matérias fresca e seca de PD ocorreram nas progênies JG1 e SM8, respectivamente. Não houve diferenças entre progênies quanto a diâmetro do colo e área foliar, mas sob a copa da progênie FE4, que apresentou o maior diâmetro da copa, observou-se um dos menores rendimentos de matéria seca de PD. Palavras-chave:Annona squamosa, fruta-do-conde, invasoras. SILVA, P.S.L. et al.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Floristic composition and growth of weeds under custard apple (Annona squamosa) progenies

Silva¹,

Barbosa

Oliveira³

et al. 2004

Planta daninha

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“…Para que este manejo seja eficaz, faz-se necessário determinar o período, a partir do transplante, em que a cultura pode conviver com a comunidade infestante, antes que seu crescimento e sua produção sejam afetados, bem como o período em que a cultura deve ser mantida sem a presença das plantas daninhas, de modo a assegurar pleno potencial de crescimento e de produção e de forma que as plantas infestantes que emergirem após não mais concorram com a cultura do eucalipto (Toledo, 1998).…”

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Efeito de períodos de controle de plantas daninhas sobre o desenvolvimento inicial de plantas de eucalipto

et al. 2000

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“…Interference by weed community composed mainly of signal grass was observed to have a negative effect on Eucalyptus urophylla between 14 and 140 days, which was characterized as a critical period for weed interference (CPWI) (Toledo et al, 2000). Weed density is also an important factor on weed interference in the early growth stages of several eucalyptus species.…”

Section: Discussionmentioning

confidence: 99%

“…are commonly observed on eucalyptus plantations, since eucalyptus cultivation has been expanding into areas previously used for pasture. These weed species have some characteristics that make their control difficult, such as: fast growth, seed dormancy and regrowth, even after herbicide application, making crop establishment and management more difficult (Schreiner, 1988;Toledo et al, 2000Toledo et al, , 2001Cruz et al, 2010). In addition, competition with these weeds may have detrimental effects on several physiological characteristics in eucalyptus, such as photosynthetic rate, stomatal conductance, transpiration rate and water use efficiency (Santos et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Interference of Urochloa decumbens and Panicum maximum in the initial growth of six clones of Eucalyptus urograndis

Colmanetti¹,

Bacha²,

Braga³

et al. 2017

Aust J Crop Sci

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Weeds play a strong pressure on the eucalyptus early growth, leading to a delay in their development. Therefore, many studies have tried to identify eucalyptus clones that are more tolerant to weed competition to supply information to producers, genetic improvement programs and the scientific community. The objective of this study was evaluate the interference of signal grass (Urochloa decumbens) and guinea grass (Panicum maximum) in the early growth of six clones of Eucalyptus urograndis, as well as the reciprocal effect. The experiment was conducted in an open and semi-controlled area in 8-L pots using a completely randomized experimental design with a 3 x 6 factorial scheme (U. decumbens, P. maximum and weed-free control and six eucalyptus clones). After ninety days of planting, the following variables were measured: eucalyptus stem diameter, height, total chlorophyll concentration, chlorophyll fluorescence (Fv/Fm), net assimilation rate and eucalyptus and weed dry biomass. In coexistence with Guinea grass (Panicum maximum), clone 3 (ms 709 H) exhibited a 78.2% reduction in dry biomass compared to clone 4 (C 219 H), which obtained the highest dry biomass. In coexistence with signal grass (Urochloa decumbens), clone 6 (ms 686 H) was the most negatively affected by weed competition, with an 80.7% lower dry biomass than clone 4. In general, clones 1 (ms 710 H), 2 (H 1069) and 4 were more resistant, and clones 3 and 6 were more sensitive to weed interference. Both weeds were affected by eucalyptus, but Guinea grass was more sensitive than signal grass.

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Efeitos da faixa de controle do capim-braquiária (Brachiaria decumbens) no desenvolvimento inicial de plantas de eucalipto

Abstract: Efeitos da faixa de controle do capim-braquiária (Brachiaria decumbens) no ... 1Recebido para publicação em 10/9/1999 e na forma revisada em 15/12/1999.

Cited by 26 publications

References 0 publications

Floristic composition and growth of weeds under custard apple (Annona squamosa) progenies

Floristic composition and growth of weeds under custard apple (Annona squamosa) progenies

Efeito de períodos de controle de plantas daninhas sobre o desenvolvimento inicial de plantas de eucalipto

Interference of Urochloa decumbens and Panicum maximum in the initial growth of six clones of Eucalyptus urograndis

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