Efeitos de quantidades de fitomassa de adubos verdes na supressão de plantas daninhas

Severino, Francisco José; Chistoffoleti, P.J.

doi:10.1590/s0100-83582001000200010

Cited by 31 publications

(23 citation statements)

References 4 publications

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“…All cover crops tested were effective to reduce these variables, especially Urochloa ruziziensis and Fagopyrum tataricum, which promoted the largest reductions in almost all the amounts of biomass studied (Table 1). These results can be explained by the physical control provided by the presence of biomass on the soil surface (Severino & Christofoletti 2001), which modify and reduce the quality of the light required to stimulate germination (Theisen et al 2000). It also promotes a physical barrier that can affect the reserve material in seedlings, during their early development, what may be confirmed by the significant reduction in the GSI (higher than 50%), when compared to the control treatment without cover crops.…”

Section: Resultsmentioning

confidence: 84%

“…Silva et al (2011), analyzing the allelopathy of Camelina sativa (Brassicaceae) on the germination and initial development of Bidens pilosa, verified the occurrence of inhibitory activity, represented by the delay in seed germination, resulting in a decrease of the average germination speed with increasing concentrations of different aqueous extracts. Severino & Christofoletti (2001) observed a reduction in the Bidens pilosa emergence rate, depending on the availability of cover crops on the soil.…”

Section: Resultsmentioning

confidence: 93%

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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: Resultsmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 93%

Cover crops on the development of beggar's-tick

Pacheco

Monteiro

Petter

et al. 2013

Pesqui. Agropecu. Trop.

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“…A supressão da infestação de plantas invasoras é um aspecto relevante, pois possibilita o uso de medidas integradas de manejo de forma mais sustentável e menos dependente de produtos químicos (Severino & Christoffoleti, 2001).…”

Section: Introductionunclassified

Taxa de semeadura de Brachiaria brizantha consorciada com milho na incidência de plantas daninhas

Castagnara

Zóz

Berté

et al. 2011

Agraria

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Taxa de semeadura de Brachiaria brizantha consorciada com milho na incidência de plantas daninhas RESUMOA cobertura vegetal do solo promovida pela Brachiaria brizantha pode reduzir a incidência de plantas daninhas na área de cultivo. Assim, o presente trabalho objetivou estudar o efeito do consórcio de milho com B. brizantha em diferentes taxas de semeadura sobre a incidência de plantas daninhas. O experimento foi conduzido a campo em solo classificado como Latossolo Vermelho eutroférrico. O delineamento experimental utilizado foi de blocos ao acaso em esquema fatorial 4 x 2, sendo uma testemunha com milho solteiro, três densidades de semeadura de B. brizantha (7,5, 15 e 22,5 kg ha -1 de sementes) em consórcio com a cultura do milho, e dois períodos de avaliação da incidência de plantas daninhas na área, realizados 150 e 180 dias após a colheita do milho e dessecação da B. brizantha. Foi constatada oscilação na população de plantas daninhas entre as duas épocas de avaliação, enquanto as taxas crescentes de semeadura de braquiária proporcionaram redução linear na população de plantas daninhas. Palavras-chave: Braquiária, cobertura do solo, Zea mays.Seeding rate of Brachiaria brizantha intercropped with corn in the incidence of plants ABSTRACT Soil vegetation cover promoted by Brachiaria brizantha can reduce the incidence of weeds in the cropping area. Thus, the objective of the present study was to evaluate the effects of corn intercrop with Brachiaria brizantha in different sowing rates on the incidence of weeds. The experiment was carried out in a field experiment in a soil classified as an Oxisol. The experimental design was made in randomized blocks, with a factorial scheme 4 x 2, with one sole cropped corn as control, three B. brizantha (7.5, 15 and 22.5 kg ha -1 ) sowing rates, intercropped with corn crop, and two evaluation periods of weed incidence in the area, made at 150 and 180 days after the corn harvest and B. brizantha desiccation. The weed population varied in the two evaluation periods, while the increasing sowing rates of B. brizantha provided linear reduction in the weed population.

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“…As coberturas que ofereceram maior proteção ao solo favoreceram o crescimento das plantas de feijão. No entanto, há casos em que, conforme constatado por Severino & Christofoleti (2001), a fitomassa dos adubos verdes, incorporados ao solo ou na sua superfície, reduz as populações de plantas daninhas.…”

Section: Introductionunclassified