Banco de sementes do solo em área agrícola sob diferentes sistemas de manejo estabelecida sobre campo natural

Favreto, Rodrigo; Medeiros, Renato Borges de

doi:10.1590/s0101-31222006000200005

Cited by 17 publications

(10 citation statements)

References 15 publications

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“…Since emerging plants are counted, the method indicates the number of viable seeds, while excluding nonviable seeds (Poiani & Johnson 1988). For each sampled point, 50% of the total volume collected in the field was mixed with the same amount of vermiculite (Favreto & Medeiros 2006) and distributed into aluminum trays of 700 ml volume, forming a soil layer of about 2 cm (sufficient to maintain moisture in the sample). The samples were kept in a greenhouse at the Department of Forage Plants and Agrometeorology at the Faculty of Agronomy of UFRGS, under a natural temperature regime.…”

Section: Seed Bank Assessmentmentioning

confidence: 99%

“…To date, only very few published studies of the seed bank in subtropical grasslands in southern Brazil exist, and even less so studies that include the seed bank of areas that had suffered such changes in the past and then were used as grassland again (Maia et al 2003;Favreto & Medeiros 2006). According to the review by Hopfensperger (2007), a high similarity of established vegetation and the seedbank is a general feature of grassland ecosystems that have not been subject to disturbances for longer periods, even though there are exceptions (e.g.…”

Section: Introductionmentioning

confidence: 99%

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The seed bank of subtropical grasslands with contrasting land-use history in southern Brazil

et al. 2015

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The expansion of land use for agriculture is among the main reasons for the reduction of natural grasslands around the world, and little is known about the recovery potential of original native grassland vegetation from seed banks. The aim of this study was to assess the seed bank potential of grassland areas with or without history of cultivation in southern Brazil. Specifically, we aimed at evaluating if agricultural use allowed for the persistence of species typical of natural grasslands in soil seed banks. We analyzed seed banks in two areas with a history of cultivation and in two natural grasslands. Samples were collected in spring and autumn in order to assess transient and persistent components, and were characterized by density, richness, presence of exotic species and relationship between seed bank and established vegetation. Both richness and density were high; we found a total of 114 species and a mean density of 61,796 seedlings/m 2 for all four areas in the spring sampling. In the natural grasslands, the dominant species of established vegetation were mostly absent from the soil seed bank. Our study indicates that the seed bank is of little relevance for the recovery of typical grassland vegetation after disturbance.

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Section: Seed Bank Assessmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The seed bank of subtropical grasslands with contrasting land-use history in southern Brazil

et al. 2015

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“…(Poaceae) in the seed test, and Portulaca oleracea (Asteraceae) in the seedling emergence test. According to Favreto & Medeiros (2006), physical characteristics of soil related to infrequent revolving practices during soil preparation were related to decreased emergence of Brachiaria plataginea seedlings and increased emergence of Sida rhombifolia. In the aforementioned study, other edaphic variables, such as organic matter, pH and P quantity, also had significant effects on the composition of the seed bank evaluated in cultivation areas in a natural field in the low central region of Rio Grande do Sul.…”

Section: Resultsmentioning

confidence: 99%

Seed bank from soil of coffee plantations associated with grevillea trees

et al. 2008

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-This study aimed to study the composition and dynamics of seed bank from soil of coffee plantations associated with grevilea trees in the experimental fields of the Southwest Bahia State University, on Vitória da Conquista campus. The experiments were carried out from September 2006 to May 2007. The coffee trees (Coffea arabica) were sown at three x one m spacing, associated with grevillea trees (Grevillea robusta) and maintained at densities of 277, 139, 123, 69, 62 and 31 plants ha -1 , under direct sunlight. One hundred grams of soil were taken from each treatment with four repetitions and later identified and counted with a 10x magnifying glass. To determine seedling emergence, four soil samples of 1000 g were collected from each experimental field and transported to the greenhouse. Seedling emergence was observed by counts after 15, 30 and 45 days. The experimental design was randomized blocks of seven treatments (soil from different tree densities) and four replicates; the experimental unit consisted of a plastic tray (0, 30 x 0.22 x 0.06 m) containing 1.000 g of soil. The variables utilized to characterize the bank and its dynamics were: relative frequency, relative density, relative abundance, importance index and species diversity (Shannon-Weaver index).Increased number of monocotyledon seeds and sprouts were verified in the treatments maintained under full sunlight.

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“…Essas espécies apresentam ampla distribuição nos domínios fitogeográficos da Amazônia, Caatinga, Cerrado, Mata Atlântica (FILGUEIRAS, 2012;NAKAJIMA, 2012) Espécies vegetais potenciais para recuperação de áreas sob a influência da mineração... 91 TABELA 2: Parâmetros fitossociológicos das espécies vegetais coletadas no período chuvoso presentes na camada superficial do solo em campo de altitude localizado no planalto de Poços de Caldas, Minas Gerais. As espécies estão organizadas segundo ordem crescente do VI (Valor de Importância %).…”

Section: Nascimento G O Et Al 90unclassified

Espécies Vegetais Potenciais Para Recuperação De Áreas Sob a Influência Da Mineração De Bauxita Em Campos De Altitude Na Região De Poços De Caldas - Mg

Nascimento¹,

Pereira²,

Barros³

et al. 2017

Ciênc. Florest.

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REsUMOO objetivo deste trabalho foi realizar um levantamento das principais espécies provenientes de propágulos na camada superficial do solo sobre minas de bauxita, em "Campos de Altitude de Mata Atlântica", como forma de sugerir espécies potenciais para recuperação de áreas degradadas. Foram realizadas amostragens dos cinco primeiros centímetros de substratos contendo o material propagativo da área. As amostras foram acompanhadas em viveiro e realizou-se a contagem da emergência de plantas a cada 24 horas, sendo identificados os indivíduos no final do experimento. Foram calculados os índices de abundância e diversidade. Neste estudo, três das espécies de maior ocorrência foram comuns nos dois períodos (seco e chuvoso): Ageratum fastigiatum, Echinolaena inflexa e Borreria latifolia. O valor do Índice de Shannon (H') encontrado para as espécies provenientes da camada superficial do solo em vegetação de "Campos de Altitude de Mata Atlântica" no período seco correspondeu a 2,79 nats.ind -1 e 2,23 nats.ind -1 no período chuvoso. Já a equabilidade de Pielou (J') observada para o período seco foi igual a 0,72 e 0,63 para o período chuvoso. A similaridade entre os dois períodos foi de 0,36. Comparando a variável resposta, número de indivíduos entre os dois períodos, identificou-se diferença estatística com maior média para o período seco. De acordo com as condições que este trabalho foi realizado, é possível afirmar que existem espécies com potencial para recuperação de áreas mineradas em vegetação de Campos de Altitude. Portanto, sugere-se que sejam realizados estudos complementares de ecologia dessas espécies e de tecnologia de sementes como forma de fundamentar a aplicação desses conhecimentos em práticas de recuperação de áreas mineradas.

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Banco de sementes do solo em área agrícola sob diferentes sistemas de manejo estabelecida sobre campo natural

Cited by 17 publications

References 15 publications

The seed bank of subtropical grasslands with contrasting land-use history in southern Brazil

The seed bank of subtropical grasslands with contrasting land-use history in southern Brazil

Seed bank from soil of coffee plantations associated with grevillea trees

Espécies Vegetais Potenciais Para Recuperação De Áreas Sob a Influência Da Mineração De Bauxita Em Campos De Altitude Na Região De Poços De Caldas - Mg

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