Analog agroforestry system uses native tree species to improve soil conditions and the microclimate of degraded areas. This study aimed to assess the impact of analog agroforestry on physical, chemical, and biological soil attributes. We tested the hypothesis that some of these attributes can be used as indicators of soil quality improvement compared to a managed pasture area. Two experimental sites were selected, an analog agroforestry site and a pasture site. In October 2016 (end of the dry season), soil samples were collected from the 0–5 and 5–10 cm depths and the soil fauna community was sampled using pitfall traps. The analog agroforestry system led to increased total abundance, total richness, mean richness, evenness, and diversity of the soil fauna community as well as higher gravimetric soil moisture, sand content, pH, calcium, magnesium, and sum of exchangeable bases, which are good indicators of soil quality. Adults of Coleoptera, Diptera, Gastropoda, Hymenoptera, Isopoda, Lepidoptera, Poduromorpha, Symphypleona, Pseudoscorpionida, Lepidoptera and larvae of Coleoptera, Diptera, Lepidoptera, and Neuroptera were the most abundant taxonomic groups in the analog agroforestry system.
Agro-Forestry Systems (AFS), in addition to being a means of providing income, can be considered an alternative way of helping conserve biodiversity, both above and below ground. The aim of this study was to evaluate the accumulation of tree leaf litter and its nutrient content as well as the composition of fauna in the soil-litter layer in two Agro-Forestry Systems (AFS-1 and AFS-2), using as reference an area of secondary Forest (SF), in the Quilombola do Campinho da Independência community, Paraty, in the state of Rio de Janeiro (RJ), Brazil. The collection of accumulated leaf litter and soil-litter fauna was carried out from four sample points in each area and at two different seasons of the year, the rainy and the dry season. The leaf litter stock and its nutrient content (Ca, Mg, P, K and N) were measured. The extraction of fauna was carried out according to Tüllgren’s method, modifying the Berlese funnel. The stock of accumulated leaf litter differed between the two areas only in the rainy season; the amounts were smaller in AFS-2. In general, the Agro-Forestry Systems were very similar to the secondary forest in terms of levels and/or stock of nutrients in the majority of cases, at least in one of the seasons studied. The composition of the soil fauna groups in the Agro-Forestry System (AFS-1 and AFS-2) had a high degree of similarity to that found in the forest, and these systems mainly favour the populations of groups like Collembola and Formicidae.
ResumoO objetivo do estudo foi avaliar o padrão de deposição anual de serapilheira, carbono orgânico (CO) e nitrogênio (N) entre as áreas de floresta secundária (FS) e plantios de sabiá (Mimosa caesalpinaefolia Benth.) e andiroba (Carapa guianenses Aubl.) (ambos os plantios com regeneração natural) na Floresta Nacional Mário Xavier, no município de Seropédica (RJ). Para a avaliação anual de deposição da serapilheira foram usados coletores circulares durante um ano (de outubro de 2006 a setembro de 2007). Os valores de aporte total de serapilheira foram 8,82, 8,35 e 6,95 Mg ha -1 ano -1 para as áreas de plantio de M. caesalpinaeolia, plantio de C. guianenses e floresta secundária, respectivamente. O verão foi a única estação onde não foram observadas diferenças significativas nos aportes de serapilheira entre as áreas. As frações folha e fruto, em média, foram as que contribuíram com maior e menor aporte de material decíduo, respectivamente, nas três áreas avaliadas. Observou-se que as áreas de plantios de M. caesalpinaefolia e C. guianenses contribuíram com fluxo de CO e N para o solo via serapilheira semelhante a FS. Correlações entre as taxas de deposição serapilheira e as variáveis climáticas foram observadas apenas nas áreas de floresta secundária (correlação negativa com a temperatura e precipitação) e M. caesalpinaefolia (correlação negativa com a precipitação). Palavras-chave: Carapa guianenses; Mimosa caesalpinaefolia; carbono da serapilheira. AbstractLitter and carbon deposition in secondary forest, Sabia and Andiroba plantations. The aim of the study was to evaluate the pattern of annual litter, organic carbon (OC) and nitrogen (N) between the secondary forest (SF) and sabia plantations (Mimosa caesalpinaefolia Benth.) and andiroba (Carapa Guyanese Aubl.) (both plantings with natural regeneration) the National Forest Mario Xavier, in the municipality of Seropédica (RJ). For the annual assessment of deposition of litter they were used circular collectors during one year (October 2006 to September 2007. The total litter input values were 8.82, 8.35 and 6.95 Mg ha -1 year -1 in the areas of planting M. caesalpinaeolia, planting C. Guyanese and secondary forest, respectively. Summer is the only season where there were no significant differences in litter contributions between areas. The leaf fractions and fruit, on average, were those that contributed to higher and lower input material deciduous, respectively, in the three areas assessed. It was observed that the planting areas M. caesalpinaefolia and C. guianenses contributed with CO and N flowing into the soil through litter similar to SF. Correlations between litter deposition rates and climate variables were observed only in the secondary forest (negative correlation with temperature and precipitation) and M. caesalpinaefolia (negative correlation with precipitation).
ResumoComunidades de fungos micorrízicos arbusculares em ecossistemas de pastagem e floresta tropical ripária no município de Guajará-Mirim/RO. Compreender a dinâmica dos organismos do solo nos ecossistemas naturais pode ser uma ferramenta muito útil para determinar a qualidade dos ecossistemas florestais e agrícolas no estado de Rondônia. A hipótese deste trabalho é que a comunidade de fungos micorrízicos arbusculares (FMA) varia em função do sistema de uso do solo e da sazonalidade. O trabalho objetivou avaliar a composição e diversidade da comunidade de FMA em ecossistemas de pastagens e floresta tropical ripária em regeneração natural, no município de Guajará-Mirim/RO. Coletou-se, aleatoriamente, 10 amostras simples de solo, em cada um dos ecossistemas, em três épocas do ano (seca/2018; chuvosa/2018; e seca/2019). Foram avaliadas a riqueza de espécies de FMA e densidade dos esporos; a frequência de ocorrência de espécies; os índices de diversidade de Shannon-Wiener (H') e dominância de Simpson; e o número de amostra ideal. A riqueza de espécies de FMA variou entre as áreas e as estações, com tendência à maior riqueza no pasto, na estação seca/2018. As espécies dominantes de FMA foram Glomus macrocarpum e Acaulospora mellea nos dois ecossistemas; A pastagem, na estação seca/2018, apresentou maior diversidade de espécies (H') de FMA comparado a floresta tropical ripária na estação chuvosa/2018 e na estação seca/2019; a pastagem na estação seca/2019 diferiu em 100% da floresta tropical ripária, na composição da comunidade de espécies de FMA; são necessárias mais de 10 amostras simples para identificar um número maior de espécies de FMA em áreas de pastagem e floresta tropical ripária, no município de Guajará-Mirim/RO. Palavras-chave: diversidade de espécies; ecossistema ripário; qualidade do solo.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.