Avaliação de sabiazeiro (Mimosa caesalpiniaefolia Benth.) quanto a acúleos e preferência por bovinos

Lima, Izabel C. A. R. de; Lira, Mário de Andrade; Mello, Alexandre Carneiro Leão de; Santos, Mércia Virgínia Ferreira dos; Freitas, Erinaldo Viana de; Ferreira, Rinaldo L. C.

doi:10.5039/agraria.v3i3a345

Cited by 11 publications

(12 citation statements)

References 6 publications

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“…Vieira et al (2005), studying the selectivity of cattle in a sabiá canopy, observed greater preference for legumes in the wet season (83.1%) compared with the dry season (12.3%). Trees without thorns were preferred in the wet season, corroborating a similar study by Lima et al (2008), who claimed that the preference for sabiá forage is variable depending on the amount of thorns present and the time of year.…”

Section: Rate Of Nutrient Disappearance and C:n Ratiosupporting

confidence: 88%

Decomposition of cattle dung on grazed signalgrass (Brachiaria decumbensStapf) pastures in monoculture or intercropped with tree legumes

Lima

Dubeux

Santos

et al. 2016

African Journal of Range & Forage Science

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Livestock excreta is one of the major nutrient sources in natural grasslands. Understanding how livestock diet and season affects the decomposition dynamics is critical to nutrient cycling models. We hypothesised that livestock diet and season of the year affect dung decomposition. This study evaluated the decomposition and release of N, P, K, Ca, Mg, and Na from faeces of cattle collected in dry and wet seasons. Treatments were signalgrass (Brachiaria decumbens Stapf) in monoculture or mixed with sabiá (Mimosa caesalpiniifolia Benth.) or gliricidia (Gliricidia sepium (Jacq.) Kunth ex Walp.). Excreta samples were incubated in nylon bags for 0, 2, 4, 8, 16, 32, 64, 128 and 256 d. The single negative exponential mathematical model was adequate (P < 0.0001) to explain the decomposition. The relative rate of dung decomposition (k) was greater for samples that originated from cattle grazed on signalgrass (k = 0.00284 g g −1 d −1 ), followed by sabiá (k = 0.00233 g g −1 d −1 ), and gliricidia (k = 0.00200 g g −1 d −1 ) pastures. The rate of nutrient release showed a time effect for all variables and interaction between time and season for Ca (P = 0.0042) and Mg (P = 0.0013). Faeces collected from cattle grazing/browsing intercropped pastures tended to have lower decomposition rates.

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Section: Rate Of Nutrient Disappearance and C:n Ratiosupporting

confidence: 88%

Decomposition of cattle dung on grazed signalgrass (Brachiaria decumbensStapf) pastures in monoculture or intercropped with tree legumes

Lima

Dubeux

Santos

et al. 2016

African Journal of Range & Forage Science

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“…In addition to high wood quality, M. caesalpiniifolia has also been used as forage for grazing livestock, goats, and sheep, due to its nutritional value with high levels of protein and minerals (Moura et al 2006). The species has also been used to produce ethanol (Paes et al 2007) and reclaim areas marked by high soil erosion and low nitrogen content (Moura et al 2006;Lima et al 2008). Despite these applications, few studies have been carried out on many important aspects of M. caesalpiniifolia, such as reproductive biology, genetic diversity, and cytology.…”

Section: Introductionmentioning

confidence: 98%

Polyploidy, B chromosomes, and heterochromatin characterization of Mimosa caesalpiniifolia Benth. (Fabaceae-Mimosoideae)

Sousa

Reis

Viccini

2012

Tree Genetics & Genomes

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Eight populations of Mimosa caesalpiniifoliaBenth. were investigated using a cytogenetic approach. Here, we describe for the first time details of the karyotype including chromosome morphology, physical mapping of chromomycin A3 (CMA) 4′,6-diamidino-2-phenylindole (DAPI) and silver staining of nucleolar organizer regions (Ag-NOR banding), as well as 45S rDNA sites. All populations studied showed karyotypes with 2n02x026 small metacentric and submetacentric chromosomes, although some individuals exhibited 2n04x052 chromosomes. Moreover, we observed putative additional B chromosomes in some populations. The CMA banding and fluorescent in situ hybridization techniques revealed NOR heteromorphism on the unique pair containing 45 rDNA site (chromosome 12) while the Ag-NOR banding indicated NORs on both cytotypes. Up to two and four nucleoli were observed, respectively, on individuals with 2n02x026 and 2n04x052 chromosomes and the differences in nucleolar size seems to be directly related to NOR heteromorphism in some individuals. The data present new and important information to understand karyotypic evolution of Mimosa and Fabaceae.

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“…O bosque foi implantado em 1991 em uma área anteriormente ocupada com Brachiaria decumbens. Desde a implantação, o bosque foi manejado de diferentes formas, tendo recebido 200 g de superfosfato simples e esterco de curral curtido no ano de 1995 (Lima, 2008) e desramado por bovinos para avaliar a preferência de plantas com e sem acúleos. No período de agosto a outubro de 1998, foram coletados 38 fustes de forma proporcional ao tamanho do povoamento para determinação da biomassa.…”

Section: Introductionunclassified

Decomposição de serrapilheira em bosque de sabiá na Zona da Mata de Pernambuco

Freire

Júnior

Lira³

et al. 2010

R. Bras. Zootec.

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RESUMO -Objetivou-se avaliar a decomposição de frações de serrapilheira de sabiá (Mimosa caesalpiniifolia Benth) utilizando-se a técnica de sacos de náilon. Foram incubadas as seguintes frações de serrapilheira: folha senescente, folha no início da mineralização e ramos com até 20 mm de diâmetro. A incubação foi realizada nos períodos de 0, 4, 8, 16, 64, 100 e 256 dias nos anos de 2006 e 2007. As frações foram distribuídas em blocos ao acaso com cinco repetições. Foram avaliados os desaparecimentos de biomassa, nitrogênio (N) e fósforo (P), as concentrações de nitrogênio e fósforo e a relação carbono/ nitrogênio da serrapilheira ao longo dos períodos de incubação. De modo geral, o modelo exponencial negativo explicou o desaparecimento de biomassa, nitrogênio e fósforo, todavia, houve variação entre anos e, em alguns casos, apesar de significativos, os modelos apresentaram baixa correlação entre dados observados e preditos. A taxa de desaparecimento de biomassa foi lenta, uma vez que apenas 30% de biomassa de folhas foi mineralizada após 256 dias de incubação. A mineralização líquida de nitrogênio apresentou ampla variação entre anos e diferiu entre as frações estudadas. O teor de nitrogênio da serrapilheira incubada aumentou, em média, até os 32 dias (folhas) e até os 64 dias (ramos) de incubação, estabilizando-se em seguida. Foi usado o modelo platô linear para explicar esse processo. Com o passar dos períodos de incubação, a relação carbono/ nitrogênio diminuiu. Apesar de elevado teor de nitrogênio, a decomposição da serrapilheira de sabiá é lenta, o que pode reduzir as perdas de nutrientes no bosque, aumentando sua sustentabilidade e reduzindo os possíveis efeitos deletérios ao ambiente.Palavras-chave: ciclagem de nutrientes, leguminosa arbórea, sistema silvipastoril Litter decomposition under a sabiá canopy in the Forest Zone in PernambucoABSTRACT -The research aimed to evaluate the decomposition of sabiá (Mimosa caesalpiniifolia Benth) litter fractions by using the nylon bag technique. The following litter fractions were incubated: senescent leaves, leaves at the beginning of mineralization, and branches with diameter up to 20 mm. Incubation was performed during periods of 0, 4, 8, 16, 64, 100, and 256 days in 2006 and 2007. The fractions were distributed in a random block design with five replications. It was evaluated the disappearance of biomass, nitrogen (N), and phosphorus (P), concentrations of nitrogen and phosphorus and the carbon/ nitrogen ratio of litter during the periods of incubation. In general, the negative exponential model explained the disappearance of biomass, nitrogen, and phosphorus, however, there was a variation among years and, in some cases, despite of being significant, the models showed a low correlation between predicted and observed data. Biomass disappearance rate was slow because only 30% of leaf biomass was mineralized after 256 days of incubation. Net nitrogen mineralization showed large variation among years, and it differed among the studied fractions. Nitrogen conten...

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Avaliação de sabiazeiro (Mimosa caesalpiniaefolia Benth.) quanto a acúleos e preferência por bovinos

Cited by 11 publications

References 6 publications

Decomposition of cattle dung on grazed signalgrass (Brachiaria decumbensStapf) pastures in monoculture or intercropped with tree legumes

Decomposition of cattle dung on grazed signalgrass (Brachiaria decumbensStapf) pastures in monoculture or intercropped with tree legumes

Polyploidy, B chromosomes, and heterochromatin characterization of Mimosa caesalpiniifolia Benth. (Fabaceae-Mimosoideae)

Decomposição de serrapilheira em bosque de sabiá na Zona da Mata de Pernambuco

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