Interferência das plantas daninhas sobre a produtividade e qualidade de cenoura

Soares, Ismail; Freitas, Francisco Cláudio Lopes de; Negreiros, Maria Zuleide de; Freire, Guilherme; Aroucha, Édna Maria Mendes; Grangeiro, Leílson Costa; Lopes, Welder Ar; Dombroski, Jéferson Luiz Dallabona

doi:10.1590/s0100-83582010000200003

Cited by 27 publications

(26 citation statements)

References 7 publications

(8 reference statements)

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“…Um dos fatores que comprometem a produtividade e qualidade da produção agrícola, especialmente em relação às hortaliças, é a interferência das plantas daninhas (SOARES et al, 2010), que crescem de forma vigorosa competindo por água, luz e nutrientes, liberam substâncias alelopáticas, dificultam a realização de tratos culturais e colheita e são hospedeiras de pragas e doenças (FREItAS et al, 2006). Segundo Teófilo et al (2012), quando não controladas na cultura do melão, as espécies infestantes reduziram a produtividade comercial em até 100%, além de aumentar o consumo de água em até 9,6 %.…”

Section: Introductionunclassified

Fitossociologia de plantas daninhas na cultura do pimentão nos sistemas de plantio direto e convencional.

Cunha¹,

Freitas²,

Coelho³

et al. 2014

AGRO@MBIENTE

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Fitossociologia de plantas daninhas na cultura do pimentão nos sistemas de plantio direto e convencional Palavras-chave -Capsicum annum. Cobertura morta. Plantas Infestantes. Sistemas de cultivoAbstract -Objective of this work was to carry out a phytosociological study of weeds in areas cultivated with sweet pepperin no-tillage and conventional planting systems at Universidade Federal Rural do Semi-Árido (UFERSA). For each plating system, 60 days after transplanting, 32 samples were collected with a 0.50 m side square hollow, where the weeds were collected at ground level, separated by species, counted and taken to the greenhouse, until constant mass, for determination of dry matter mass. Based on these values, the following characteristics were determined: density, frequency, abundance, relative density, relative frequency, relative abundance, relative dry mass and index of relative importance value.18 species and 13 botanical families of weed were identified, being Poaceae family the most representative, followed by Amaranthaceae family. All tested species were present in the CPS, which had a density of 466.5 plants m -2 . In the no-tillage planting system, 13 species with density of 79.12 plants m -2 occurred, being Phyllanthus tenellus and Commelina benghalensis the species with higher density. With respect to relative dry mass, Croton lobatus species stand out from the others, despite lower density, and the highes index of relative importance value was found for the species Lobatos croton, Phyllanthus tenellus and Commelina benghalensis with 14.13%, 14.02 % and 12.35%, respectively. It is possible to conclude that the no-tillage system changed the dynamics of the weed community, reducing the total density of the weed by 83.04% if compared to conventional plating system.

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Section: Introductionunclassified

Fitossociologia de plantas daninhas na cultura do pimentão nos sistemas de plantio direto e convencional.

Cunha¹,

Freitas²,

Coelho³

et al. 2014

AGRO@MBIENTE

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“…Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 4.0 International License interfere with crops by competing for light and nutrients within the soil-plant system (Soares et al, 2010). The degree of interference of weeds in the crops depends on the distribution, frequency and abundance of the species, especially those that are in greater density and diversity (Kuva et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Phytosociology of weed community in two vegetable growing systems

Barros¹,

Reis²,

Magalhães³

et al. 2018

Afr. J. Agric. Res.

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The aim of this study was to perform a phytosociological survey of the weed community present in organic and conventional vegetable growing systems conducted in Alagoas state, in Brazil. The survey was carried out from February 2014 to January 2016, within which 30 samplings were made. The evaluated parameters were given by the calculation of frequency, density, abundance, relative frequency, relative density, similarity index (SI) and importance value index (IVI) for each species. In total, 299 weed species were identified, which were grouped into 11 botanical families: Amaranthaceae, Asteraceae, Commelinaceae, Cyperaceae, Euphorbiaceae, Malvaceae, Molluginaceae, Phyllantaceae, Poaceae, Rubiaceae and Solanaceae. The Euphorbiaceae family in conventional farming, stood out, since it showed an importance value index (IVI) more than, the Amaranthaceae family in the organic farming. In the conventional cultivation, IVI was of 91.53% for Asteraceae and 46.95% for Poaceae. Moreover, a major diversity of weed species was observed in organic cultivation, being superior to conventional one in all phytosociological parameters.

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“…Diversos fatores podem influenciar no desenvolvimento das hortaliças; dentre eles, destaca-se a interferência imposta pelas plantas daninhas que emergem espontaneamente e competem com a cultura por água, luz e nutrientes, exercendo efeito sobre a quantidade e qualidade dos frutos produzidos (SOARES et al, 2010;TEÓFILO et al, 2012).…”

Section: Introductionunclassified

Períodos de interferência de plantas daninhas na cultura do pimentão nos sistemas de plantio direto e convencional

et al. 2015

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Resumo: Objetivou-se com este trabalho avaliar os períodos de interferências das plantas daninhas no pimentão (Capsicum annum L.), cultivado nos sistemas de plantio direto (SPD) e convencional (SPC). Para isso, foi realizado um experimento em esquema de parcelas subdivididas, distribuídas no delineamento em blocos casualizados com quatro repetições. O SPD e o SPC foram avaliados nas parcelas, e nas subparcelas, os sete períodos de controle e convivência entre as plantas daninhas e o pimentão: 0; 0-14; 0-28; 0-49; 0-70; 0-91 e 0-112 dias após transplantio (DAT). Antes de cada capina e na ocasião da colheita, foram avaliadas as espécies, a densidade e a matéria seca das plantas daninhas. Na cultura do pimentão foram avaliados diâmetro, comprimento, número, peso médio dos frutos e produtividade. Verificou-se menor incidência de plantas daninhas no SPD em relação ao SPC. Quando mantida livre da competição com as plantas daninhas, a produtividade de pimentão foi 69,57% menor no SPC em relação ao SPD. O período crítico de prevenção à interferência foi de 19 a 95 DAT no SPD e de 11 a 100 DAT no SPC. Palavras-chave:Capsicum annum L. Cobertura do solo. Período crítico. Abstract:The subject of this work is evaluate the periods of weeds interference on yield of sweet pepper (Capsicum annum L.), cultivated in no-tillage and conventional systems. Therefore, an experiment was conducted in randomized blocks of a distributed split plots with four replications design. The no-tillage and conventional systems were evaluated in plots and subplots, during the seven periods of control and coexistence among sweet peppers and weeds: 0; 0-14; 0-28; 0-49; 0-70; 0-91 and 0-112 days after transplanting (DAT). Before weeding and harvest time, they were evaluated species, density and dry mass of weeds. In the sweet peppers crops, diameter, length, number, average fruit weight and yield were evaluated. It was observed less weeds in no-tillage than conventional system. Without competitors, these weet peppers productivity was 69.57% less in conventional than no-tillage system. The critical period of weeds interference was from 19 to 95 DAT in no-tillage system and from 11 to 100 DAT in convention tillage. Key words: Capsicum annum L. Critical period. Soil coverPeríodos de interferência de plantas daninhas na cultura do pimentão nos sistemas de plantio direto e convencional

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Interferência das plantas daninhas sobre a produtividade e qualidade de cenoura

Cited by 27 publications

References 7 publications

Fitossociologia de plantas daninhas na cultura do pimentão nos sistemas de plantio direto e convencional.

Fitossociologia de plantas daninhas na cultura do pimentão nos sistemas de plantio direto e convencional.

Phytosociology of weed community in two vegetable growing systems

Períodos de interferência de plantas daninhas na cultura do pimentão nos sistemas de plantio direto e convencional

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