Cobertura morta e adubação orgânica na produção de alface e supressão de plantas daninhas

Ferreira, Izabel Cristina Pereira Vaz; Araújo, Alisson Vinícius de; Nascimento, Andréa M. A.; Cavalcanti, Thâmara Figueiredo Menezes; Santos, L.D. Tuffi

doi:10.1590/s0034-737x2013000400019

Cited by 12 publications

(14 citation statements)

References 16 publications

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“…The adequate handling of weeds is a determining factor to search for higher productivity in lettuce culture, considering that the competition between plants leads to significant productivity losses (Ferreira et al, 2013). The total period to prevent the interference of weeds that infest lettuce comprehends 21 days after the culture emergence; in case the handling is not conducted during this period, the productivity losses may get to 25% (Giancotti et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Competitive Ability of Lettuce with Ryegrass1

et al. 2016

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-The objective of the study was to evaluate the competitive ability of summer crisp and butterhead lettuce types in coexistence with populations of ryegrass. The experimental design was completely randomized in a factorial 2 x 7 scheme, with four replications. On the A factor the lettuce types (summer crisp and butterhead) were allocated and, on B, the densities of ryegrass (0, 2, 4, 8, 16, 32 and 64 plants per pot). The number of leaves, chlorophyll content, leaf area, green mass and dry mass of the lettuce types and ryegrass were evaluated, and the diameter of the culture stem and the tiller number of the weed were determined. Differences in competitive ability between the lettuce types in competition with ryegrass were found, and butterhead was the most competitive when compared with summer crisp for all variables studied. There was an average loss of leaf area in lettuce types of up to 80% when it competed with ryegrass in the populations involved. Ryegrass is a very competitive weed to infect lettuce, and its handling is necessary, even at low densities to avoid productivity losses. The butterhead type of lettuce supports longer competition with ryegrass compared to summer crisp. (0, 2, 4, 8, 16, 32 Keywords: interference, Lactuca sativa, Lolium multiflorum. RESUMO -Objetivou-se neste estudo avaliar a habilidade competitiva dos tipos de alface, crespa e lisa, em convivência com populações de azevém. O delineamento experimental adotado foi inteiramente casualizado, arranjado em esquema fatorial 2 x 7, com quatro repetições. No fator A alocaram-se os tipos de alface (crespa e lisa) e, no B, as populações de azevém

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Section: Introductionmentioning

confidence: 99%

Competitive Ability of Lettuce with Ryegrass1

et al. 2016

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“…Previous studies have shown that vegetables differ in terms of yield when mulching is used. Tifton grass mulch provided increased dry matter weight of lettuce (Ferreira et al, 2013). For garlic, there was no effect of rice straw mulch (Trani et al, 2008).…”

Section: Resultsmentioning

confidence: 91%

“…Another aspect to be considered is that different cultivars of a particular vegetable may have different levels of adaptability to the same production system (Meagy et al, 2013;Renaud et al, 2014;Resende et al, 2016), and one should evaluate the viability of Brachiaria as a mulch option for cauliflower cultivation, as well as the adaptability of commercial cultivars in this cultivation system. Previous studies have shown that vegetables differ in their response to mulching (Resende et al, 2005;Santos et al, 2011;Ferreira et al, 2013). For this reason, further research is needed to identify residues that have adequate weed control, without, however, reducing crop yield (Price and Norsworthy, 2013).…”

Section: Introductionmentioning

confidence: 99%

Cauliflower Cultivars Associated with Urochloa decumbens Straw Mulch in Integrated Weed Management

2019

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In vegetable farming, the reduction in the use of herbicides has been an important factor in the definition of the production system. The objective of this research was to evaluate crop yield of cauliflower cultivars grown on Urochloa decumbens straw mulch, as well as the effect of the association between straw and cultivars on weed management. The treatments were arranged in a 2 x 4 factorial scheme: two managements (with or without U. decumbens straw mulch) and four cauliflower cultivars (Barcelona, Bromus, Júlia and Lisblanc). The experiment used a randomized block design with four replicates. There was no interference of straw mulch on crop yield of cauliflower cultivars. Hybrids Barcelona and Júlia presented yields of 22.0 and 23.9 t ha-1, respectively, and they did not differ from each other. The Bromus and Lisblanc materials did not adapt to the edaphoclimatic conditions of the region, which resulted in reduced cultural control and high weed emergence after weeding. U. decumbens straw had high control of the weed community (581.2 pls m-2 - without straw and 8.3 pls m-2 - with straw). It is concluded that the U. decumbens straw as mulch is an effective tool in integrated management of weeds in cauliflower crops, without interfering with crop yield, and its potential to control weed community density is approximately 98.6%, at 22 days after transplanting. The adaptability of the cauliflower cultivar to the region has a high impact on weed management.

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“…Its rapid growth provides shading and therefore positively affects neighbouring plants (Moreira & Bragança, 2010;Batista et al, 2014). The largest expression represented in the rainy season may be related to greater water availability, favouring further (Ferreira et al, 2013;Cunha et al, 2014). …”

Section: Resultsmentioning

confidence: 99%

“…Similarly, changes in the composition of weed communities were also observed in different agricultural crops, such as sugarcane (Kuva et al, 2007;Soares et al, 2011), pastures (Ferreira et al, 2014), bean (Tavares et al, 2013), cover crops (Lima et al, 2014;Lamego et al, 2015), manioc (Cardoso et al, 2013;Soares et al, 2015), corn (Correa et al, 2011), corn intercropped with legumes (Oliveira et al, 2014) and corn intercropped with forage (Batista et al, 2014;Concenço et al, 2015), millet (Teodoro et al, 2015), lettuce (Ferreira et al, 2013), Jatropha curcas (Concenço et al, 2014) and coffee under organic management (Maciel et al, 2010a;Partelli et al, 2010).…”

Section: Cynodon Dactylon and Ipomoea Grandifoliamentioning

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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Cobertura morta e adubação orgânica na produção de alface e supressão de plantas daninhas

Cited by 12 publications

References 16 publications

Competitive Ability of Lettuce with Ryegrass1

Competitive Ability of Lettuce with Ryegrass1

Cauliflower Cultivars Associated with Urochloa decumbens Straw Mulch in Integrated Weed Management

Weed community composition in different agro-systems

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