Alelopatia de plantas de cobertura na superfície ou incorporadas ao solo no controle de Digitaria spp.

Moraes, Pedro Valério Dutra de; Agostinetto, Dirceu; Panozzo, Luís Eduardo; Tironi, Siumar Pedro; Galon, Leandro; Santos, Lourivaldo S.

doi:10.1590/s0100-83582011000500002

Cited by 9 publications

(10 citation statements)

References 12 publications

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“…These results demonstrate that the amount of up to 8.0 t ha -1 of biomass was effective to reduce (more than 50%) the values for these variables, in relation to the control, except for P. glaucum. Similar results were observed by Moraes et al (2010), with a significant reduction in the SDB and LA of Bidens pilosa, when treated with 4.0 t ha -1 of ryegrass biomass (Lolium multiflorium) on the soil surface. These results indicate the potential use of these cover crops as a tool for the integrated weed management in no-till system.…”

Section: B Ruziziensis and F Tataricum Treatments Reduced The Tnep supporting

confidence: 82%

“…These results demonstrate that, when using 8.0 t ha -1 , there is a reduction of more than 50% in these variables, when compared to the control, whereas the cover with C. abyssinica and F. tataricum resulted, respectively, in the lowest root dry biomass and root volume averages (Figure 3). Moraes et al (2010) found similar values for the RDB of Bidens pilosa covered with arrowleaf clover, at 6.0 t ha -1 of dry biomass maintained on the soil surface. Ferreira et al (2007) pointed out that the Pinus elliottii extract caused no allelopathic effect on beggar's-tick, but that the eucalyptus extract significantly reduced the beggar's-tick germination speed index.…”

Section: Cover Cropsupporting

confidence: 57%

“…Moraes et al (2010), studying the use of canola (Brassica napus), radish (Raphanus sativus), clover (Trifolium vesiculosum) and ryegrass (Lolium multiflorum), observed that in addition to inhibiting the emergence, growth and development of Bidens pilosa, the weed root system was also reduced by increasing the amount of biomass of those species on the soil surface.…”

Section: D Graphmentioning

confidence: 99%

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Cover crops on the development of beggar's-tick

Pacheco

Monteiro

Petter

et al. 2013

Pesqui. Agropecu. Trop.

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Studies to identify potential cover crops species for the no-till system and minimal amounts of biomass required to reduce the emergence and development of weeds in cereal crop areas may represent an important tool in the integrated weed management. Thus, this study aimed at evaluating the inhibition of the emergence and growth of Bidens pilosa plants, using different cover crops biomass levels on the soil surface. The experiment was carried out in a greenhouse located in Bom Jesus, Piauí State, Brazil, from December 2011 to March 2012, in a randomized experimental blocks design with four replications, in a (5x6)+1 factorial scheme, consisting of six cover crop species and five biomass levels on the soil surface, plus a control with no soil cover. The species evaluated were Pennisetum glaucum (ADR 7010 and ADR 300 cultivars), Crotalaria ochroleuca, Urochloa ruziziensis (syn. Brachiaria ruziziensis), Crambe abyssinica and Fagopyrum tataricum, at five biomass levels corresponding to 4.0 t ha-1, 8.0 t ha-1, 12.0 t ha-1, 16.0 t ha-1 and 20.0 t ha-1. Urochloa ruziziensis and Fagopyrum tataricum were considered the best ones for controlling B. pilosa, with 4.0 t ha-1 of their biomass being sufficient to reduce the total number of emerged plants, germination speed index, shoot dry biomass, leaf area, root dry biomass and root volume of B. pilosa.

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Section: B Ruziziensis and F Tataricum Treatments Reduced The Tnep supporting

confidence: 82%

Section: Cover Cropsupporting

confidence: 57%

Section: D Graphmentioning

confidence: 99%

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Cover crops on the development of beggar's-tick

Pacheco

Monteiro

Petter

et al. 2013

Pesqui. Agropecu. Trop.

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“…Moraes et al (2010) observed reduction of RDM of B. pilosa when Trifolium visiculosum was used as a cover crop, when the residue amount of 6 t ha -1 on soil surface was used.…”

Section: Horizontalis Root Developmentmentioning

confidence: 86%

“…Promising results were founded by Moraes et al (2010), showing a significant reduction of Bidens pilosa LA and SDM with the use of 4 t ha -1 of Azevém (Lolium multiflorium) phytomass on soil surface. Studies using aqueous extracts of clover Persian (Trifolium resupinatum) and clover Alexandrian (Trifolium alexandrium) aerial parts, showed height and shoot mass inhibition of bell (Convolvulus arvensis), mustard fields (Sinapasis arvensis) and pigweed (Amaranthus retroflexus ) (Maighany et al, 2007).…”

Section: Shoot Development Of D Horizontalismentioning

confidence: 99%

Influence of different cover crops on the emergence and development of Digitaria horizontalis

Fonseca¹,

Sousa²,

Santos³

et al. 2016

Aust J Crop Sci

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The physical and / or allelopathic effects caused by cover crops residue can be used to suppress the emergence and / or reduce weed growth. Based on the effects of mulch on soil surface, the objective of this study was to evaluate the influence of cover crops biomass at different residue amount levels in the emergence and development of Digitaria horizontalis. The experiment was carried out in a greenhouse from May to August, 2014, in a completely randomized design with four replications in (5 × 4) + 1 a factorial scheme, consisting of 5 cover crop species (millet cv. ADR 300 (Pennisetum glaucum), braquiaria (Urochola brizantha), sorghum (Sorghum bicolor), cowpea (Vigna unguiculata) and Crotalaria ocroleuca) and four levels of dry mass of the corresponding plant (3, 6, 9 and 12 t ha -1 ) on soil surface, with another treatment without cover crop (0 t ha -1 ). The analyzed variables were the number of emerged plants, shoot dry mass, leaf area, root dry mass and root volume. Cover crops have proven potential to reduce D. horizontalis in all vegetative stages. The species C. ochroleuca and U. Brizantha showed a greater efficiency in reducing the number of emerged plants with a reduction of 86% and 91%, respectively. Amounts between 3 and 6 t ha -1 of cover crops dry mass have been sufficient to promote significant reduction in emergence and growth of Digitaria horizontalis.

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Direct sowing of onion (Allium cepa) over cover crops with different lengths of the chemical fallow

2022

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The objective of this work was to evaluate the effect of cover crops and fallow duration on the onion crop planted in direct sowing in trials carried out for three years. In the year 2013, two field trials were carried out in two sites. Two cover crops (oats and millet) and one uncovered control were evaluated at three planting dates. The studied variables were crop establishment and dry matter of the cover. In the field trials performed in 2014 and 2015 the effect of the length of the chemical fallow of oats on the establishment of onion was evaluated. The effect of the duration of the chemical fallow of oats was also evaluated in laboratory in 2015 in Petri dishes. In 2013, the greatest establishment was obtained in the treatments without cover in both sites. In 2014 the greater the duration was of the chemical fallow of the cover, the greater the onion establishment. In the field trial in 2015, no effects of fallow duration on crop establishment were observed, a result attributable to the intense rainfall recorded. In the laboratory, germination was higher in treatments with longer fallow periods. Based on the results, evidence was obtained of the negative effect of the cover crops in the establishment of the onion crop. These effects were inversely related to the duration of chemical fallow and may be attributable to allelopathic effects.

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Alelopatia de plantas de cobertura na superfície ou incorporadas ao solo no controle de Digitaria spp.

Cited by 9 publications

References 12 publications

Cover crops on the development of beggar's-tick

Cover crops on the development of beggar's-tick

Influence of different cover crops on the emergence and development of Digitaria horizontalis

Direct sowing of onion (Allium cepa) over cover crops with different lengths of the chemical fallow

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