Flora invasora de cultivos de aveia-preta, milho e sorgo em região de cerrado do Estado de Mato Grosso do Sul, Brasil

Guglieri-Caporal, Adriana; Caporal, Francisco José Machado; Kufner, Deborah Christiane Leite; Alves, Fábio de Matos

doi:10.1590/s0006-87052011000200001

Cited by 8 publications

(7 citation statements)

References 15 publications

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“…e Merremia spp.) (Martins et al, 2010;Santos et al, 2010;Carvalho et al, 2011;Guglieri-Caporal et al, 2011), que, além de competirem por recursos do meio, interferem no processo de colheita mecânica, pois podem causar embuchamento da colhedora, devido a seu hábito trepador (Martins et al, 2010;Karam et al, 2011). Em relação a essas duas espécies, nenhum trabalho foi encontrado na literatura a respeito do potencial relativo à competição por nutrientes.…”

Section: Introductionunclassified

Estudo comparativo do acúmulo de massa seca e macronutrientes por plantas de Zea mays e Ipomoea hederifolia

Carvalho

Bianco

2014

Planta daninha

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RESUMO -Foram realizados dois experimentos em casa de vegetação com o objetivo de estudar o acúmulo e a distribuição de massa seca e macronutrientes em milho e Ipomoea hederifolia. Plantas das duas espécies foram cultivadas, separadamente, em vasos com substrato de areia e irrigação com solução nutritiva. Os tratamentos foram representados pelas épocas de amostragem, realizada a intervalos de 14 dias, iniciando 21 dias após a emergência (DAE). Uma planta de milho apresentou crescimento lento até 30 DAE, quando a alocação de massa seca foi maior em raízes e folhas (80%), e uma planta de I. hederifolia, até 50 DAE, quando a alocação de massa seca foi maior em ramos e folhas (79%). O acúmulo máximo de massa seca foi quase cinco vezes maior em milho (134 g por planta) comparado a I. hederifolia (29 g por planta). Em média, os teores de N e K foram maiores em plantas de I. hederifolia. Os acúmulos máximos de macronutrientes pelo milho foram de 1.431, 474, 1.832, 594, 340 e 143 mg por planta, e por I. hederifolia, de 727, 52, 810, 350, 148 e 65 mg por planta, para N, P, K, Ca, Mg e S, respectivamente. A taxa de acúmulo médio diário de massa seca e macronutrientes pelas plantas de milho foi crescente até 87 DAE, atingindo o máximo aos 103 DAE, enquanto para as plantas de I. hederifolia foi crescente até 121 DAE, atingindo o máximo aos 138 DAE. Assim, além da interferência na colheita, uma população de I. hederifolia também pode competir por nutrientes com a cultura do milho.Palavras-chave: milho, corda-de-viola, competição por nutrientes, interferência de plantas daninhas. (29 g per plant). The average values of N and K contents were greater in I. hederifolia. Maximum accumulations of macronutrients by maize were 1,431; 474; 1,832; 594; 340, and 143 mg per plant, while by I. hederifolia, 727; 52; 810; 350; 148, and 65 mg per plant, for N, P, K, Ca, Mg, and S, respectively ABSTRACT -Two experiments were carried out under greenhouse conditions to study the accumulation and distribution of dry mass and macronutrients in maize and Ipomoea hederifolia. Plants of both species had grown, separately, in pots with sand substrate and irrigation with nutrient solution. Treatments were represented by the times of evaluation, realized in intervals of 14 days, starting at 21 days after emergence (DAE). A maize plant showed slight growth up to 30 DAE, when dry mass allocation was higher in roots and leaves (80%); while an I. hederifolia plant, up to 50 DAE, when the allocation of dry mass was higher in offshoots and leaves (79). Dry mass accumulation was almost five times greater in maize (134 g per plant) than in I. hederifolia

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Section: Introductionunclassified

Estudo comparativo do acúmulo de massa seca e macronutrientes por plantas de Zea mays e Ipomoea hederifolia

Carvalho

Bianco

2014

Planta daninha

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“…It is also likely that the seeds of these weed species accompany the seeds of the harvested grain crops. All these have been listed and highlighted in regional literature on weeds as being problematic species (Ferrari 2012, Guglieri-Caporal 2011, Lorenzi 2000), and with the exception of Commelina erecta and Richardia brasiliensis , are considered among the weeds with greatest herbicide resistance according to The International Survey of Herbicide Resistant Weeds (Heap 2016). …”

Section: Resultsmentioning

confidence: 99%

“…Their development in productive areas tends to reduce the quality and quantity of the crop yield, making it difficult to harvest, and in some extreme cases even making it unviable (Guglieri-Caporal et al 2011). According to Pott et al (2006), success in controlling invasive plants begins with the floristic inventory of the infesting species and knowledge of the biology of those species that are predominant.…”

Section: Introductionmentioning

confidence: 99%

Checklist for the crop weeds of Paraguay

Egea¹,

Mereles²,

Peña-Chocarro³

et al. 2016

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Paraguay, a country whose economy is based mainly on agriculture and livestock for export, has experienced a major expansion in mechanized crops during the last few decades. Despite being heavily dependent on agriculture, Paraguay has very limited research on crop weeds, in spite of these having a high economic impact on production. This work aims to update and enhance the knowledgebase on the most common weeds affecting productive fields throughout the different ecoregions of Paraguay. We present here the first checklist of crop weeds for the country, which includes a total of 256 taxa (189 species, 10 subspecies, 54 varieties and 3 forms), with the most species-rich families being Poaceae and Asteraceae followed by Malvaceae, Amaranthaceae, Fabaceae and Solanaceae. The list includes three new records for the country. Synonyms, distribution details within Paraguay, habit and a voucher specimen are provided for each taxon.

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“…Under favorable conditions such as good moisture and abundant lighting, it develops and spreads quickly (Kissmann and Groth, 1999;Lorenzi, 2000) and has been found in cotton crops (Albertoni and Almeida Neto, 1981), rice and soybeans (Albertoni and Almeida Neto, 1981). Nonetheless, weeds can reduce the quality and yield of a crop, make it difficult to harvest and, in extreme cases, make it unfeasible (Guglieri-Caporal et al, 2011). Also, weeds can enable the increase of grain moisture and drying costs, can encourage fermentation and increase the incidence of pests at storage (Vargas and Roman, 2005).…”

Section: Introductionmentioning

confidence: 99%

The influence of cover crops on erva de touro (Tridax procumbens)

Oliveira¹,

Santos²,

Fonseca³

et al. 2016

Afr. J. Agric. Res.

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Tridax procumbens is an herbaceous plant belonging to the Asteraceae family and popularly known as erva-de-touro or margaridinha. The objective of this study is to investigate the effects of cover crops when incorporated or maintained on the soil surface at different levels of straw, on the emergence and initial development of erva de touro. The experiment was conducted in a greenhouse during the period of May to August 2014, in a (5 x 4 + 1) factorial scheme. Factor A consists of five species of cover crops: millet cv. ADR 300 (Pennisetum glaucum), Brachiaria (Urochola brizantha), sorghum (Sorghum bicolor L.), cowpea (Vigna unguiculata (L.) Walp.) and sunn hemp (Crotalaria ocroleuca), and factor B had four levels of dry mass (dry matter) of these plants (3, 6, 9 and 12 t ha-1) on the soil surface. One treatment had no cover crops (control). The experiment involves a randomized block design with four replications. The analyzed variables were total number of emerged plants, shoot dry mass, leaf area, root dry mass and root volume. The cover crops at different levels of straw were efficient, giving greater prominence to the species, P. glaucum and V. unguiculata in suppressing the erva do touro (T. procumbens).

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Flora invasora de cultivos de aveia-preta, milho e sorgo em região de cerrado do Estado de Mato Grosso do Sul, Brasil

Cited by 8 publications

References 15 publications

Estudo comparativo do acúmulo de massa seca e macronutrientes por plantas de Zea mays e Ipomoea hederifolia

Estudo comparativo do acúmulo de massa seca e macronutrientes por plantas de Zea mays e Ipomoea hederifolia

Checklist for the crop weeds of Paraguay

The influence of cover crops on erva de touro (Tridax procumbens)

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