Banco de sementes no solo em sistemas de cultivo lavoura-pastagem

Ikeda, F. S.; Mitja, Danielle; Vilela, Lourival; Carmona, Ricardo

doi:10.1590/s0100-204x2007001100005

Cited by 27 publications

(18 citation statements)

References 11 publications

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“…Nesta situação, as culturas de safrinha são fundamentais para a implantação e viabilização do sistema em questão. Neste contexto, a cultura do sorgo é considerada como alternativa para produção de grãos no Centro-Oeste (Heckler, 2002;Silva et al, 2009a), adaptando-se a vários ambientes (Pale et al, 2003;Baumhardt et al, 2005;Dan et al, 2010) que juntamente com a braquiária, proporciona benefícios para o sistema plantio direto (Ikeda et al, 2007).…”

Section: Introductionunclassified

Consórcio sorgo e braquiária na entrelinha para produção de grãos, forragem e palhada na entressafra

et al. 2014

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The intercropping system has been used to produce grain and forage, but few trials have been conducted with sorghum in the Central-West region of Brazil. Therefore, the objective this study was to identify, in the off-season cultivation, the intercropping of sorghum and brachiaria that provides higher grain, dry matter (straw) and crude protein (forage), yieds with two cuttings in off-season brachiaria . The field trial was installed in RioVerde-GO, March 5, 2009. The experiment was arranged in a randomized complete block design in a factorial scheme 2x3+1+3, corresponding to two sowing depths of brachiaria (2 and 10 cm) and three species (Brachiaria decumbens, Recebido para publicação em 06/12/2012Recebido para publicação em 06/12/ e aprovado em 17/10/2013

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Section: Introductionunclassified

Consórcio sorgo e braquiária na entrelinha para produção de grãos, forragem e palhada na entressafra

et al. 2014

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“…The sowing of forage grass after cultivation of the crop, replacing fallow, becomes a viable alternative to soil cover and consecutively weed suppression, leading to decreased soil seed bank over the years (Nunes et al, 2006;Severino et al, 2006;Ikeda et al, 2007;Timossi et al, 2007;Noce et al, 2008). The presence of vegetation cover on the soil in adequate amounts for direct sowing, with the use of forage grasses, favors the implementation of the integrated croplivestock system, since these species provide enough plant mass to be available in animal feed in the period off-season, mitigating the effect of seasonality of the forage grass.…”

Section: Introductionmentioning

confidence: 99%

Weed suppression in the formation of brachiarias under three sowing methods

Lima

Timossi

Almeida³

et al. 2014

Planta daninha

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-The success of conservation systems such as no-till depends on adequate soil cover throughout the year, which is possible through the use of cover crops. For this purpose the species belonging to the genus Urochloa has stood out by virtue of its hardiness and tolerance to drought. Aiming ground cover for the no-till system, the objective was to evaluate the establishment of two species of the genus Urochloa, in three sowing methods, in the weed suppression and the sensitivity of these forages to glyphosate. The study design was a randomized block with a 2 x 3 x 3 factorial arrangement, in which factor A was composed of Urochloa ruziziensis and Urochloa hybrid CIAT 36087 cv. Mulato II, factor B was formed by sowing methods: sown without embedding, sown with light embedding and sown in rows, and factor C was composed of three doses of glyphosate (0.975, 1.625 and 2.275 kg ha -1 of acid equivalent). For determination of weed suppression, assessment of biomass yield and soil cover was performed, by brachiaria and weeds, at 30, 60, 90, 120 and 258 days after sowing. Visual assessment of the desiccation efficiency at 7 and 14 days after herbicide application was performed. It is concluded that embedding Urochloa seeds stands out in relation to sowing in the soil surface. Urochloa ruziziensis is more efficient in the dry weight yield, weed suppression, in addition to being more sensitive to glyphosate herbicide.Keywords: no-till, crop-livestock integration, Urochloa sp., desiccation, glyphosate. Palavras-chave: plantio direto, integração lavoura-pecuária, Urochloa sp., dessecação, glyphosate. RESUMO -

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“…The seeds of species of Poaceae generally have short longevity, and in the pastures are subject to germination followed by death, due to the difficulty to overcome the dense straw layer and also by grazing by animals (Pitelli, 1998). (Fernandes et al, 1999;Jakelaitis et al, 2003;Meschede et al, 2007;Ikeda et al 2007;Sodre Filho et al, 2008).…”

Section: Although Management Practicesmentioning

confidence: 99%

Weed community composition in different agro-systems

et al. 2017

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Weed communities in agricultural systems are diverse and subjected to different agronomic practices. In this study, a phytosociological survey of the weed community in different cropping systems consisting of corn, horticulture, perennial cultivation of Jatropha curcas and pasture of Urochloa brizantha in Rio Verde, GO, Brazil, was carried out. Assessments were performed at the beginning (October 2011) and at the end (March 2012) of the rainy season. After identifying and counting species, were calculated the phytosociological indices of density, frequency, abundance and relative importance, as well as the diversity index of Shannon-Wiener, evenness index of Pielou and similarity coefficient of Sorense. Were found 46 species of sixteen families, especially Poaceae. The most important species were: Alternanthera tenella in the annual growth environment during the both periods; Panicum maximum (early rainy season) and Chamaescy hirta (end of the rainy season) in the vegetable garden; Eleusine indica (early rainy season) and Galinsoga parviflora (end of the rainy season) in the perennial crop and Sida rhombifolia (early rainy season) and Neonotonia wigrtii (end of the rainy season) in the pasture. Lower diversity indices and evenness were observed in the pasture environment. Sampling time presented a higher impact on similarities when compared to the different environments.Keywords: Jatropha curcas, corn, pasture, no-tillage Composição florística de comunidades de plantas daninhas em diferentes agrossistemas ResumoComunidades de plantas daninhas em agrossistemas são diversificadas devido às práticas agronômicas adotadas. Neste trabalho realizou-se um levantamento fitossociológico em comunidade de plantas daninhas em diferentes sistemas de cultivo constituídos de cultivo de milho, olericultura, cultivo perene com pinhão-manso e pastagem de Urochloa brizantha, em Rio Verde, GO, no início (outubro de 2011) e no final (março de 2012) da época chuvosa. Após identificação e contagem das espécies calcularam-se os índices fitossociológicos: densidade, frequência, abundância e importância relativa, e os índices de diversidade de Shannon-Wiener e equitabilidade de Pielou e o coeficiente de similaridade de Sorense. Encontrou-se 46 espécies, distribuídas em dezesseis famílias, com destaque para Poaceae. As espécies mais importantes foram Alternanthera tenella no ambiente de cultivo anual em ambas as épocas; Panicum maximum (início da época chuvosa) e Chamaescy hirta (final da época chuvosa) em horta; Eleusine indica (início da época chuvosa) e Galinsoga parviflora (final da época chuvosa) em cultivo perene; e Sida rhombifolia (início da época chuvosa) e Neonotonia wigrtii (final da época chuvosa) em pastagem. Menores índices de diversidade e de equitabilidade foram observados em área de pastagem. Quanto às similaridades entre tratamentos, a época foi mais determinante do que os ambientes, considerando que as semelhanças entre ambientes foram maiores dentro da mesma época amostrada, exceto para a pastagem no final da es...

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Banco de sementes no solo em sistemas de cultivo lavoura-pastagem

Cited by 27 publications

References 11 publications

Consórcio sorgo e braquiária na entrelinha para produção de grãos, forragem e palhada na entressafra

Consórcio sorgo e braquiária na entrelinha para produção de grãos, forragem e palhada na entressafra

Weed suppression in the formation of brachiarias under three sowing methods

Weed community composition in different agro-systems

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