Navegando por Autor "Silva, Aline Oliveira"

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Agroforestry systems, nutrients in litter and microbial activity in soils cultivated with coffee at high altitude
(Escola Superior de Agricultura "Luiz de Queiroz", 2014-03) Notaro, Krystal de Alcantara; Medeiros, Erika Valente de; Duda, Gustavo Pereira; Silva, Aline Oliveira; Moura, Patrícia Maia de
Agroforestry systems are an alternative option for sustainable production manage- ment. These systems contain trees that absorb nutrients from deeper layers of the soil and leaf litter that help improve the soil quality of the rough terrain in high altitude areas, which are areas extremely susceptible to environmental degradation. The aim of this study was to characterize the stock and nutrients in litter, soil activity and the population of microorganisms in coffee (Cof- fea arabica L.) plantations under high altitude agroforestry systems in the semi-arid region of the state of Pernambuco, Brazil. Samples were collected from the surface litter together with soil samples taken at two depths (0-10 and 10-20 cm) from areas each subject to one of the follow- ing four treatments: agroforestry system (AS), native forest (NF), biodynamic system (BS) and coffee control (CT).The coffee plantation had been abandoned for nearly 15 years and, although there had been no management or harvesting, still contained productive coffee plants. The ac- cumulation of litter and mean nutrient content of the litter, the soil nutrient content, microbial biomass carbon, total carbon, total nitrogen, C/N ratio, basal respiration, microbial quotient, metabolic quotient and microbial populations (total bacteria, fluorescent bacteria group, total fungi and Trichoderma spp.) were all analyzed. The systems that were exposed to human inter- vention (AS and BS) differed in their chemical attributes and contained higher levels of nutrients when compared to NF and CT. BS for coffee production at high altitude can be used as a sustain- able alternative in the high altitude zones of the semi-arid region in Brazil, which is an area that is highly susceptible to environmental degradation.
Biochemical parameters of an Oxisol submitted to high doses of gypsum in the coffee culture
(Editora UFLA, 2020) Naves, Andrêssa de Paula; Silva, Aline Oliveira; Barbosa, Marisângela Viana; Pinto, Flávio Araújo; Santos, Jessé Valentim dos; Saggin Junior, Orivaldo José; Guimarães, Paulo Tácito Gontijo; Carneiro, Marco Aurélio Carbone
The objective of this study was to determine the influence of increasing doses of agricultural gypsum on the quality of the soil biochemical parameters in coffee cultivation (Coffea arabica L.) over two climatic seasons in the Brazilian Cerrado. Soil samples were collected in two seasons (dry and rainy season), at 0.00 – 0.10 m depth of an Oxisol, submitted to doses 0 (GSA); 3.5 (G3.5); 7.0 (G7.0) and 14 (G14) t ha-1 of agricultural gypsum in the coffee planting line. The biochemical parameters evaluated were: total organic carbon (TOC); microbial biomass carbon (MBC); soil basal respiration (SBR); absolute enzymatic activities [Urease, acid phosphatase, hydrolysis of fluorescein diacetate (FDA)], and enzymatic activity per unit of MBC. The significant effect (p ≤ 0.05) of gypsum doses was observed for MBC and SBR, which were higher in the treatment with G7.0 application. TOC, the enzymatic activities of Phosphatase and the FDA showed no differences between treatments. On the other hand, the specific enzymatic activities by MBC were used to describe the differences between the doses of gypsum applied, generally with greater activity in treatments G7.0 and G14. The accumulated coffee productivity was higher in G14 treatment. The results presented confirmed that the biochemical parameters of the soil are key in the evaluation of changes in soil use, and that the increase in gypsum favors activity and microbial biomass.
Indicadores biológicos de dois solos com a incorporação de subproduto da agroindústria de café
(Sociedade Brasileira de Ciência do Solo, 2014-09) Padilha, Karoline de Melo; Freire, Maria Betânia Galvão dos Santos; Duda, Gustavo Pereira; Santos, Uemeson José dos; Silva, Aline Oliveira; Souza, Edivan Rodrigues de
A adição de subprodutos orgânicos ao solo pode ocasionar mudanças na dinâmica da matéria orgânica dele, influenciando a atividade e utilização do carbono pelos microrganismos presentes nele. O objetivo deste trabalho foi avaliar a influência da aplicação de doses crescentes de subproduto da agroindústria de café nos atributos biológicos de dois solos com textura distinta, em diferentes tempos de incubação. O delineamento experimental foi em blocos casualizados, em esquema fatorial 2 × 8, sendo dois solos e oito doses de subproduto de café, com cinco repetições. Foram realizadas coletas de subamostras dos solos aos 30, 60, 90 e 125 dias após a incorporação do subproduto nesses. Nessas datas foram avaliados o carbono microbiano (C-CBM), a respiração basal microbiana (RBM) e o carbono orgânico total (COT). A adição do subproduto do café proporcionou aumentos nos valores de C-CBM, C-CO 2 e COT dos dois solos utilizados. A maior atividade microbiana ocorreu no período de 30 dias, com maior liberação de C-CO 2 ; o COT foi superior no solo argiloso por ele permitir maior proteção dos compostos orgânicos à decomposição pelos microrganismos.