Levantamento fitossociológico e banco de sementes das comunidades infestantes em áreas com culturas perenes

Monquero, Patrícia Andréa; Silva, Andréia Cristina

doi:10.4025/actasciagron.v29i3.275

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…Species identification was performed on mature plants, obtained from three or more seedlings transplanted into pots (Ekeleme et al, 2005), and they were identified by the Botanic Museum of Curitiba. To analyze seed density per unit area, the formula proposed by Monquero and Silva (2007) was used, modified to m², where the number of non-dormant seeds per m 2 was calculated with a soil density coefficient of 1.22 g cm -3 (Silveira Junior et al, 2012).…”

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confidence: 99%

Weed Seed Bank in an Agroforestry System With Eucalyptus in Subtropical Brazil

et al. 2018

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: Trees can modify the weed seed bank composition and distribution in the cropped area of an agroforestry system. This study aimed at analyzing the eucalyptus (Eucalyptus dunnii) effect on spatial distribution, functional traits abundance and weed seed bank botanic composition in an agroforestry system under no-tillage in Subtropical Brazil. The experiment was conducted in a randomized block design with five replications, and five positions between 4.5-year-old eucalyptus double rows [(4x3) x 20 m] as treatments. Soil sampling was performed at 0-20 cm and the method to quantify and identify seeds was the seedling emergence in trays, inside a greenhouse. Weed phytosociological indices (relative density, frequency and importance), functional traits abundance (life cycle, shade tolerance, reproduction, spread and seed form) and seed densities (m-2) of families and species were evaluated; 17 weed families and 49 species were found. The indices that contributed to the relative importance of families and species differed among the positions between rows. Eucalyptus grown as an intercrop changed the composition and size of the weed seed bank, in a different way for functional traits, families and species depeding on the distance from trees.

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confidence: 99%

Weed Seed Bank in an Agroforestry System With Eucalyptus in Subtropical Brazil

et al. 2018

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“…This procedure was repeated until emergence ceased 90 days after installation. The seedbank was enumerated by adapting the methodology proposed by Monquero and Silva (2007) to count the number of viable seeds in 1.0 m À2 (depth of 10 cm). It is noteworthy that the sample area was at least 1 year without applications of residual herbicides: 14 months without applications of sulfentrazone (PRE) and flumioxazin (P/P) and 12 months for indaziflam (PRE) and diuron (P/P).…”

Section: Weed Seed Bankmentioning

confidence: 99%

The impacts of ecological mowing combined with conventional mechanical or herbicide management on weeds in orange orchards

et al. 2022

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In fruit crops like citrus, weeds coexist throughout their long cycle and can cause several yield losses. Ecological mowing (ECO) is an integrated weed management (IWM) option for citrus, as it produces an in-situ mulch that suppresses the weeds; however, there is a lack of information on the impacts of tree-row conventional (CONV) and ECO mechanical weed control when combined with residual or non-residual herbicides, or standard frequent mechanical (MECH) control. This study aimed to evaluate, for 3 years in a young orange orchard, IWM using ECO and conventional mowing when combined with one of five weed control programmes: pre-emergent (PRE) herbicides (sulfentrazone [spring], indaziflam [summer]), post-emergence (POST) herbicides (glyphosate [spring], saflufenacil [summer]), PRE + POST herbicides (sulfentrazone + glyphosate [spring], indaziflam + saflufenacil [summer]) and P/P (pre/post-emergence duality) herbicides (flumioxazin [spring], diuron [summer]). Impacts on cover crop biomass deposition, weed density, population dynamics, biomass accumulation and seed banks were evaluated. Alternanthera tenella Colla (joyweed), Bidens pilosa L. (hairy beggarticks), Digitaria horizontalis Willd (crabgrass), Galinsoga parviflora Cav. (smallflower galinsoga) and Raphanus raphanistrum L. (wild radish) were the most critical weeds with changes in their population dynamics over time. The ECO treatment promoted greater biomass deposition in the tree-rows (up to ≈8.0 t ha À1 ), reducing weed density and biomass accumulation by mulch formation; similarly, MECH resulted in low weed density and a reduction in biomass accumulation. The POST and P/P treatments resulted in low levels of weed control, while ECO + PRE + POST led to almost absolute weed control (>95%). Thus, we suggest ECO + PRE + POST is an efficient IWM option in citrus tree-row crops with low-risk herbicide resistance (up to 5 MoA year À1 + mulch).

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“…As demais (13 famílias) com 1 espécie cada ARAÚJO et al, 2001;GUEDES et al, 2005 Nas três áreas conjuntamente foram registradas 26 outras florestas de várzea com cinco espécies em São famílias, 38 gêneros e 41 espécies. As famílias mais Paulo (NÓBREGA et al, 2009), quatro espécies no Distrito representadas com 4 espécies cada foram Asteraceae Federal (CARMONA, 1995) e com duas espécies no Peru (E.alba, E.sonchifolia, S.vailantii e M.congesta); (KALLIOLA et al, 1991). Em outros ambientes com oito e Cyperaceae (C.difformis, C.ferax, C.surinamensis e nove espécies em uma floresta estacional semidecidual F.miliacea) e Poaceae (P.repens, P.notatum, P.campestris e (MG) (BRAGA et al, 2008), e em uma floresta secundária E.colona).…”

Section: Composition and Density Of The Seed Banks Of Floodplain Foreunclassified

Composição e Densidade do Banco de Sementes em Uma Floresta de Várzea, Ilha do Combu, Belém-PA, Brasil

Lau¹,

Jardim²

2014

Biota Amazônia

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Levantamento fitossociológico e banco de sementes das comunidades infestantes em áreas com culturas perenes

Cited by 3 publications

References 2 publications

Weed Seed Bank in an Agroforestry System With Eucalyptus in Subtropical Brazil

Weed Seed Bank in an Agroforestry System With Eucalyptus in Subtropical Brazil

The impacts of ecological mowing combined with conventional mechanical or herbicide management on weeds in orange orchards

Composição e Densidade do Banco de Sementes em Uma Floresta de Várzea, Ilha do Combu, Belém-PA, Brasil

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