Composição florística da comunidade infestante em gramados de Paspalum notatum no município de Assis, SP

Maciel, Cleber Daniel de Góes; Poletine, Juliana Parisotto; Aquino, C.J.R.; Ferreira, DS; Maio, Raffaele

doi:10.1590/s0100-83582008000100006

Cited by 24 publications

(18 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This species composition is in agreement with observations by other researchers for maize crops, for instance in the study by Duarte et al (2007). Notably, the presence of more species of family Asteraceae is a common occurrence in Brazilian agricultural lands (OLIVEIRA; FREITAS, 2008;MACIEL et al, 2008). For the study of phytosociological indices during the weed control periods, the no-weeding control displayed higher figures for relative density, R.…”

Section: Resultssupporting

confidence: 91%

Periods of weed interference in maize crops cultivated in the first and second cycles

Campos

Barroso

Silva

et al. 2016

SCA

View full text Add to dashboard Cite

The interference of weeds in maize production may be reflected in grain yield losses that vary as a function of the density, stage and degree of aggressiveness of the species present. In the agricultural ecosystem, crops and weeds demand light, water, nutrients and space, which are frequently not available in sufficient quantities, leading to competition. The aim of this work was to determine the period of interference of weed plants, in particular of naked crabgrass (Digitaria nuda) on maize crop in the first and second harvest. The treatments were defined as increasing periods of coexistence and increasing control of weed community (7, 14, 21, 28, 35, 42, 49, and 56 days), two more controls, a control including one with weed control until the end of the culture cycle and another with coexistence until the harvest. For each period, were evaluated the stand of maize plants, length of ear, number of grains per row, number of rows per ear, cob, 100-grain weight, and grain productivity. The data obtained were subjected to analysis of variance using the F test, with average treatments compared using Tukey's test at 5% probability. Crop productivity was evaluated by means of regressions, the critical periods of interference were estimated. The critical timing of weed removal was 25 days for both harvests. The critical weed free period was 54 and 27 days for the first and second harvest respectively. For the conditions of the first and second harvest, the critical period of weed control was of 29 and 2 days respectively. Key words: Digitaria nuda. Naked crabgrass. Competition. Phytosociology. Weed interference. Zea mays. ResumoA interferência de plantas daninhas no milho pode refletir em perdas na produtividade de grãos que variam em função da densidade, estágio e grau de agressividade das espécies presentes. No ecossistema agrícola, a cultura e planta daninha possuem demandas por luz, água, nutrientes e espaço, que na maioria das vezes, não estão disponíveis em quantidades suficientes, estabelecendo-se a competição. O objetivo desse trabalho foi determinar o período de interferência de plantas de plantas daninhas em especial do capim-colchão (Digitaria nuda) na cultura do milho na primeira e segunda safra. Os tratamentos foram divididos em períodos crescentes de convivência e de controle da comunidade infestante (7; 14; 21; 28; 35; 42; 49 e 56 dias), mais duas testemunhas, uma com controle até o fim do ciclo da cultura e outra com convivência até a colheita. Para cada período foram avaliadas o estande de plantas de milho, comprimento das espigas, número de grãos por fileiras, número de fileiras por espiga, massa de 100 grãos e produtividade de grãos. Os dados obtidos foram submetidos à análise de variância

show abstract

Section: Resultssupporting

confidence: 91%

Periods of weed interference in maize crops cultivated in the first and second cycles

Campos

Barroso

Silva

et al. 2016

SCA

View full text Add to dashboard Cite

show abstract

“…According to Grombone-Guarantini and Rodrigues (2002), the fact that the vast Other phytosociological surveys of weeds conducted in different climatic and soil conditions in Brazil have also shown families Asteraceae, Fabaceae and Cyperaceae among those identified with the most prevalent species in lawn of Paspalum notatum (Maciel et al, 2008;Nordi and Landgraf, 2009;Maciel et al, 2010a;Oliveira, 2011) and of Zoysia japonica (Maciel et al, 2010b). Maciel et al (2010b), through a phytosociological survey of residential gardens with dwarf eelgrass or Japanese eelgrass (Z. japonica) in the Brazilian municipality of Ourinhos, SP, have also found a decrease in the number of species identified between March and October, indicating that several factors may be involved in this result.…”

Section: Resultsmentioning

confidence: 99%

“…Repetitions were represented by sampling performed with the aid of a hollow frame with an internal area of 0.25 m², totaling a final area of 45 m² in the evaluations of the four months, similarly to the methodologies described by Maciel et al (2008).…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, it is important to know the weed community, as well as the investment in efficient methods to assist in this practice, since, with this, the type of management to be adopted is going to be directed, as well as how and when to use it (Deuber, 1997). Maciel et al (2008) have reported the absence in the literature of information on the frequency of the weed community prevalent in lawn in the different regions of Brazil, as well as the shortage of technical information for its implementation and maintenance. Silva et al (2008) have mentioned the need to recognize the weed species so that likely eradication procedures are more effectively implemented, since its control may depend on the particular characteristics of each species.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phytosociological Survey of Weeds in Carpet Grass in Distinct Periods of the Year

et al. 2016

Self Cite

View full text Add to dashboard Cite

-Lawn with grass classified as Axonopus compressus is very common in BrazilSouthern region, where it normally presents an adequate low temperature tolerance and a high diversity of weed infestation. This work has aimed to conduct a phytosociological survey of weeds in lawn consisting of Axonopus compressus from CEDETEG/UNICENTRO University campus located in the Brazilian municipality of Guarapuava, in the state of Paraná, in different periods of 2013. One hundred eighty 0.50 x 0.50 m samples were collected in four months, from which parameters frequency, density, abundance, relative frequency, relative density, relative abundance and importance value index were calculated. In general, 24, 7, 17 and 14 weed species were identified, distributed in 23, 3, 8 and 6 families, respectively, in April, June, October and December. The largest number of weed species was identified in Asteraceae, Fabaceae and Cyperaceae families. The ones classified as the most important and with occurrence over all periods of year were Trifolium repens (Fabaceae), Soliva pterosperma (Asteraceae) and Oxalis corniculata (Oxalidaceae). Keywords: Axonopus compressus, lawn, identification. RESUMO -Gramados com a grama denominada sempre-verde (Axonopus

show abstract

“…Similaridade -Foram selecionados 14 trabalhos de florística de plantas ruderais/ daninhas para essa análise, incluindo ambientes tipicamente antropizados urbanos ou ambientes cultivados, com metodologia de amostragem similar à realizada no presente estudo, sendo eles: presente estudo [A], Mautone et al (1990) Albertino et al (2004) [E], Schneider & Irgang (2005) [F], Carneiro & Irgang (2005) [G], Souza & Poletto (2007) [H], Silva et al (2008) [I], Cattani (2009) Silva et al (2006) [K], Souza et al (2003) [L], Maciel et al (2008) [M] e Marques et al (2010) [N].…”

Section: A Lista Florística Foi Elaborada Segundo O Apg III (2009) Ounclassified

Composição e similaridade da flora sssociada a sítios antropizados do município de João Pessoa - Paraíba

et al. 2015

View full text Add to dashboard Cite

RESUMO -Neste estudo é apresentada a composição e similaridade florística de espécies vasculares sinantrópicas em uma área periurbana antropizada, no município de João Pessoa, Estado da Paraíba, e sua relação com outras floras sinantrópicas. Foram encontradas 98 espécies, em 75 gêneros e 30 famílias. Entre as espécies, 41,84% são cosmopolitas; 29,6%, pantropicais; 13,3% ocorrem apenas no cone sul da América; 8,2%, neotropicais; 5,1%, gondwânicas; e 2% ocorrem em toda a América. Asteraceae e Poaceae foram as famílias mais representativas em número de espécies. Os resultados foram comparados com os de outros levantamentos florísticos correlatos, utilizando o índice de similaridade de Sörensen, e observou-se que não é somente a proximidade geográfica entre os locais estudados que reflete uma maior similaridade florística entre as áreas, e sim a amplitude dos táxons e a presença de micro-habitat semelhante. A área de estudo está relacionada a uma área inserida na região Centro-Oeste do Brasil.Palavras-chave: florística, plantas sinantrópicas, Nordeste, Brasil. ABSTRACT -This study presents the floristic composition and similarity of synanthropic vascular plant species in an anthropogenic peri-urban area in the city of João

show abstract

Composição florística da comunidade infestante em gramados de Paspalum notatum no município de Assis, SP

Cited by 24 publications

References 10 publications

Periods of weed interference in maize crops cultivated in the first and second cycles

Periods of weed interference in maize crops cultivated in the first and second cycles

Phytosociological Survey of Weeds in Carpet Grass in Distinct Periods of the Year

Composição e similaridade da flora sssociada a sítios antropizados do município de João Pessoa - Paraíba

Contact Info

Product

Resources

About