Estruturas relacionadas ao potencial de rebrotamento de duas espécies de Myrtaceae do Cerrado: análises morfoanatômicas e químicas

Silva, Gabriela Santos da

doi:10.11606/d.11.2018.tde-18052018-180522

Cited by 28 publications

(38 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The average annual rainfall, temperature, and relative humidity are 1,200 mm/year, 24 °C and 80%, respectively (CPRH, 2003), and the predominant soil is a dystrophic Ultisol, according to Jacomine et al (1973). The legume-grass systems were implanted in 2008 legume-grass systems, proceeded by a chemical characterization of the degraded signal grass soil (Table 1), according to Silva et al (2009). The soil correction was carried out annually with 1 Mg ha -1 of dolomitic limestone (80% PRNT), followed by 50 Kg ha -1 of superphosphate and potassium chloride.…”

Section: Methodsmentioning

confidence: 99%

Biomassa e atividade microbiana do solo em pastagem degradada de Brachiaria decumbens após implantação de leguminosas herbácea

Vasconcelos

Fracetto

Alves

et al. 2023

Rev. Bras. Geog. Fis.

View full text Add to dashboard Cite

N deficiency is one of the significant causes of tropical pasture degradation, and including legumes may be a sustainable strategy to prevent pasture degradation in tropical environments. The objective of this study was to investigate the use of forage peanut (Arachis pintoi), butterfly pea (Clitoria ternatea), calopo (Calopogonium mucunoides) and stylosanthes (Stylosanthes sp.) intercropped with signal grass to determine soil biomass and microorganismal activity in a tropical subhumid zone. Soil sampling was performed at the legume rows and, three meters away from them and in the soil of pastures with single signal grass with or without an application of N-fertilizer, two years after legume implantation and during the dry and rainy seasons. The estimate of carbon and nitrogen of microbial biomass, C-CO2 emission, and soil metabolic quotient of each legume were compared between the dry and rainy seasons, at two distances and with both single signal grass treatments. Although the rainy season decreased soil basal respiration in all treatments, forage peanut (~332 mg kg -1 ), and butterfly pea (~280 mg kg -1 ) showed pronounced soil microorganismal biomass, surpassing 27% and 14% the estimate for single signal grass not fertilized, respectively. The soil microorganisms with forage peanuts and stylosanthes also emitted more C-CO2 (~1.0 mg kg −1 h −1 ) in the dry season, indicating an effective microorganismal activity in these soils, mainly due to the absence of disturbances, as noted in the low metabolic quotients in both climatic seasons (less than 1%).

show abstract

Section: Methodsmentioning

confidence: 99%

Biomassa e atividade microbiana do solo em pastagem degradada de Brachiaria decumbens após implantação de leguminosas herbácea

Vasconcelos

Fracetto

Alves

et al. 2023

Rev. Bras. Geog. Fis.

View full text Add to dashboard Cite

show abstract

“…The six soil samples per plot were bulked into a single composite sample and cleaned of roots, air‐dried, and sieved before laboratory analyses (Jorge et al, 2016). Samples were analyzed in the Thematic Laboratory of soils and plants at INPA following standard methods (EMBRAPA, 2009) and are briefly summarized in Notes S2.…”

Section: Methodsmentioning

confidence: 99%

Palm live aboveground biomass in the riparian zones of a forest in Central Amazonia

Falen

Guedes

Castilho³

et al. 2023

Biotropica

View full text Add to dashboard Cite

Aboveground biomass estimates in the Amazon region remain uncertain, partly due to extrapolations based mainly on samples collected in upland terrains of terra‐firme forests. Most biomass estimates were focused on dicotyledonous trees or included other plant groups as a category of trees. Palms dominate areas that represent 20% of the Brazilian Amazon. However, their contribution to biomass estimates and the variation within riparian zones remain poorly documented. We estimated the biomass of palms larger than 1–cm diameter at breast height (1.3 m aboveground) in riparian plots (n = 40); investigated the potential bias caused by the use of dicotyledonous‐ or family‐ rather than species‐level equations for biomass estimation; compared palm biomass between riparian and non‐riparian plots (n = 72); and evaluated the effects of soil, topography, and stream characteristics in riparian plots on palm biomass. Mean palm biomass in riparian zones estimated with species‐level equations (27.50 ± 12.94 Mg/ha, range: 3.32–63.27 Mg/ha) was three times greater than biomass estimated with a family‐level equation (9.04 ± 4.29 Mg/ha, range: 1.51–21.25 Mg/ha) and was greater than mean biomass estimated with a pantropical equation (20.46 ± 9.29 Mg/ha, range: 3.67–47.99 Mg/ha). Mean palm biomass in riparian zones was four times greater than in non‐riparian zones. Palm biomass was high in flatter areas with poorly drained soils, but lower around streams with higher discharge. Inclusion of palms can contribute to reducing the uncertainties in biomass estimates in Amazonian forests. Recognition of the importance of riparian zones may improve conservation policies. Abstract in Portuguese is available with online material.

show abstract

“…Durante o período experimental, foram realizadas 16 coletas de amostras do efluente, determinandose: potencial hidrogeniônico (pH) e condutividade elétrica (CE), por potenciometria; turbidez, por nefelometria; sólidos totais (ST) e em suspensão (SS), por gravimetria; demanda bioquímica de oxigênio (DBO), pelo método de Winkler; demanda química de oxigênio (DQO), pelo método do refluxo fechado; nitrogênio total Kjeldahl (NTK), pelo método do micro Kjeldahl; fósforo total (P), pelo método do vanadato-molibdato; coliformes totais (CT) e termotolerantes (CTer), pelo método dos tubos múltiplos (APHA, AWWA, WEF, 2012). Após digestão ácida, foram determinados: sódio (Na) e potássio (K), por fotometria de chama e cálcio (Ca) e magnésio (Mg), por espectrofotometria de absorção atômica (SILVA, 2009). Com base nas concentrações de Na, Ca e Mg foi determinada a razão de adsorção de sódio (RAS).…”

Section: Methodsunclassified

AAPLICAÇÃO DE EFLUENTE DE ESTAÇÃO DE TRATAMENTO DE ESGOTO EM SOLO CULTIVADO COM GRAMA ESMERALDA (Zoysia japonica)

Silva

Oliveira

Fia

2019

Reveng

View full text Add to dashboard Cite

Este estudo teve como objetivo avaliar o efeito da aplicação de diferentes taxas de efluente proveniente da Estação de Tratamento de Esgoto da Universidade Federal de Lavras nas características químicas do solo, na produtividade e na composição química da grama Esmeralda (Zoysia japonica). Avaliou-se o pH, condutividade elétrica (CE), matéria orgânica (MO), nitrogênio (N), fósforo (P), potássio (K), sódio (Na), cálcio (Ca) e magnésio (Mg) do solo e a produtividade de matéria seca e os teores foliares de N, P, K, Na, Ca e Mg da grama Esmeralda. O esquema experimental adotado foi o delineamento em blocos casualizados, com cinco tratamentos e quatro repetições. Os resultados obtidos foram submetidos à análise de variância, empregando-se o teste F, e as médias foram comparadas pelo teste de Tukey, ambos a 5% de probabilidade. Após análise, verificou-se que a aplicação do efluente nas diferentes taxas proporcionou aumento significativo nos valores de pH, K, Ca, Mg, e Na do solo e na produtividade de matéria seca e nos teores foliares de N, P, K e Na da grama Esmeralda. No entanto, recomenda-se que a aplicação do efluente seja avaliada por períodos de monitoramento superiores aos deste trabalho, visto que é importante observar as variações climáticas, as condições do solo e o efeito da aplicação do efluente em longo prazo.

show abstract

Estruturas relacionadas ao potencial de rebrotamento de duas espécies de Myrtaceae do Cerrado: análises morfoanatômicas e químicas

Cited by 28 publications

References 70 publications

Biomassa e atividade microbiana do solo em pastagem degradada de Brachiaria decumbens após implantação de leguminosas herbácea

Biomassa e atividade microbiana do solo em pastagem degradada de Brachiaria decumbens após implantação de leguminosas herbácea

Palm live aboveground biomass in the riparian zones of a forest in Central Amazonia

AAPLICAÇÃO DE EFLUENTE DE ESTAÇÃO DE TRATAMENTO DE ESGOTO EM SOLO CULTIVADO COM GRAMA ESMERALDA (Zoysia japonica)

Contact Info

Product

Resources

About