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| Registros recuperados: 39 | |
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| Sousa, Carla Silva; Universidade Federal de Pernambuco; Menezes, Rômulo Simões Cezar; Universidade Federal de Pernambuco; Sampaio, Everardo Valadares de Sá Barretto; Universidade Federal de Pernambuco; Lima, Francisco Sousa; Universidade Federal do Recôncavo da Bahia; Oehl, Fritz; Agroscope Reckenholz-Tänikon Research Station; Maia, Leonor Costa; Universidade Federal de Pernambuco. |
| The diversity of arbuscular mycorrhizal fungi (AMF) can be a critical factor in enhancing both the productivity and the diversity of plants in ecosystems, and the plants in the ecosystem also strongly influence the occurrence of these fungi. The relationships between different land use systems and AMF communities in the semi-arid region of the State of Paraíba, NE Brazil were evaluated. The experiment followed a split-plot randomized block design, with four replicates. The main plots were defined by the presence or absence of trees (gliricidia and maniçoba), while the split plots were defined by three land use systems: 1) traditional cropping of maize + beans, 2) buffel grass pasture, and 3) prickly pear forage crop. The presence of trees increased... |
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Palavras-chave: Ciencia do solo; Microbiologia agrícola mycorrhizae; Agroecosystems; Glomalin. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16213 |
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| Lange,Denise; Fernandes,Wedson Desidério; Raizer,Josué; Faccenda,Odival. |
| This study had the objective of assessing the differences in foraging activity of the predacious ants between two areas, one conventional and other with no-till agriculture systems. The research was conducted in two contiguous 1.5 ha plots in Dourados MS, Brazil, from February 2001 to December 2003. Each plot received 750 baits (Nasutitermes termites), 425 at daylight and 325 at night. The termites were placed on the filter paper, on the ground, and ant attack was monitored for 15 min, until removed. Sixteen ant species were found in the no-till system and nine in the conventional system. Baits removed from no-till were significantly higher than the conventional plots and were influenced by the sampling time, at day or night. The seasons of the year did... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agroecosystems; Biological control; Community structure; Soil tillage; Species richness; Predation effects. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000600015 |
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| Reali,Catiusca; Pilz Júnior,Harry Luiz; Meile,Jean Christophe; Galindo,Sabine Shorr; Fiuza,Lidia Mariana. |
| ABSTRACT The microbial composition of different types,in ecosystems (including agro-ecosystems), has been investigated in a rapidly growing number of studies in the past few years. The importance of microorganisms, regarding the maintenance and stability of nutrients in agroecosystems, is a key to maintain the sustainability of a crop. Molecular tools to study microbial communities are possible through many methods such as RISA, DGGE, TGGE, clone libraries, T-RFLP, RAPD, SSCP and more recently NGS (Next-Generation Sequencing). DGGE is widely employed to characterize the diversity and the community dynamics of microorganisms in the environment, making possible to find out specific groups through functional genes, allowing access to data that cannot be... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agroecosystems; Functional genes; Bacteria; DGGE; Metagenomics; Microbial ecology. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132017000100201 |
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| Grez,Audrey A; Torres,Constanza; Zaviezo,Tania; Lavandero,Blas; Ramírez,Marcelo. |
| Permanent and permeable edges, where natural enemies can feed, overwinter or easily cross over, should enhance the early arrival of these predators to crops. We evaluated the abundance and species richness of coccinellids migrating to alfalfa fields adjacent to Eucalyptus, a mix of false acacia, blackberries and poplar (F-B-P), vineyards, corn and annual vegetables. From September 2007 to May 2008, we captured coccinellids in three sticky traps (2.64 m²) placed at the borders between alfalfa fields and adjacent vegetation. We also estimated the abundance of aphid populations in the alfalfa fields, by counting the number of individuals per alfalfa stem in spring, summer and autumn. We collected 90,396 coccinellids from 14 species. Neither total abundance... |
| Tipo: Journal article |
Palavras-chave: Agroecosystems; Conservation biological control; Edge effects; Ladybeetles; Migration; Natural enemies. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000200011 |
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| Murillo de la Rosa, Arnulfo. |
| Los suelos de la sabana de Huimanguillo, se localizan en lomeríos con pendientes ligeras, son de baja fertilidad, presentan alta acidez con pH que oscilan entre 4.0 a 5.5 y contenidos de materia orgánica de 1 a 4 %, a veces hasta de 20 %. La materia orgánica desempeña un papel importante en el suelo ya que aporta una gran variedad de elementos nutritivos para las plantas, y modifica la estructura del mismo, el conocimiento sobre su aporte de nutrientes es escaso, por lo que, las estimaciones del suministro al suelo se basan más bien en el rendimiento. El presente trabajo tuvo como objetivo estimar la densidad aparente (Dap), las reservas de carbono orgánico total (COT), nitrógeno total (Nt), la relación carbono nitrógeno (C/N), el carbono orgánico soluble... |
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Palavras-chave: Acrisol; Agroecosistemas; Densidad aparente; Carbono orgánico total; Nitrógeno total; Carbono orgánico soluble; Indice óptico y relación C/N; Agroecosystems; Bulk density; Total organic carbon; Total nitrogen; Soluble organic carbon; Optical index and C/N; Maestría; Producción Agroalimentaria en el Trópico. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/254 |
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| Alducin Chávez, Gerson Daniel. |
| Las áreas naturales han sufrido cambios por las actividades productivas en la mayor parte de los territorios donde el hombre se ha establecido. No obstante, en algunos lugares parte de la superficie forestal mantiene su estructura y función, siendo estos últimos sitios relevantes para la conservación de la biodiversidad. La presente tesis tuvo como objetivo evaluar la diversidad de especies de aves residentes y migratorias en un paisaje agrícola con parches de bosque secundario. Para ello se realizaron muestreos, uno por cada estación del año, utilizando conjuntamente observaciones y redes, tomando como sitios de muestreo tres parcelas de cultivo de maíz rodeadas de bosque secundario y un parche del mismo tipo de bosque. Esto permitió probar la hipótesis... |
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Palavras-chave: Agoecosistemas; Paisaje rural; Biodiversidad; Agroecosystems; Countryside; Biodiversity; Agroecosistemas Tropicales; Maestría. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/2338 |
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| Castonguay, Adam C; University of Kiel, Institute for Natural Resource Conservation, Department of Ecosystem Management; Monash University, Department of Civil Engineering; adam.charette.castonguay@monash.edu; Burkhard, Benjamin; University of Kiel, Institute for Natural Resource Conservation, Department of Ecosystem Management; Leibniz Centre for Agricultural Landscape Research (ZALF); bburkhard@ecology.uni-kiel.de; Horgan, Finbarr G; Crop and Environmental Science Division, International Rice Research Institute; f.horgan@irri.org; Settele, Josef; UFZ-Helmholtz Centre for Environmental Research; iDiv, German Centre for Integrative Biodiversity Research Halle-Jena-Leipzig; josef.settele@ufz.de. |
| The social-ecological systems of rice terraces across Southeast Asia are the result of centuries of long-term interactions between human communities and their surrounding ecosystems. Processes and structures in these systems have evolved to provide a diversity of ecosystem services and benefits to human societies. However, as Southeast Asian countries experience rapid economic growth and related land-use changes, the remaining extensive rice cultivation systems are increasingly under pressure. We investigated the long-term development of ecosystem services and the adaptive capacity of the social-ecological system of rice terrace landscapes using a case study of Banaue (Ifugao Province, Northern-Luzon, Philippines). A set of indicators was used to describe... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Adaptive capacity; Agroecosystems; Complex adaptive systems; Ecosystem services; Human well-being; Ifugao Rice Terraces. |
| Ano: 2016 |
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| van Apeldoorn, Dirk F.; Land Dynamics Group, Wageningen University; Alterra, Wageningen UR; dirk.vanapeldoorn@wur.nl; Kok, Kasper; Land Dynamics Group, Wageningen University; Kasper.Kok@wur.nl; Sonneveld, Marthijn P.W.; Land Dynamics Group, Wageningen University ; marthijn.sonneveld@wur.nl; Veldkamp, Tom (A.); Land Dynamics Group, Wageningen University; Alterra, Wageningen UR; University of Twente, ITC faculty ; veldkamp@itc.nl. |
| Resilience has been growing in importance as a perspective for governing social-ecological systems. The aim of this paper is first to analyze a well-studied human dominated agroecosystem using five existing key heuristics of the resilience perspective and second to discuss the consequences of using this resilience perspective for the future management of similar human dominated agroecosystems. The human dominated agroecosystem is located in the Dutch Northern Frisian Woodlands where cooperatives of dairy farmers have been attempting to organize a transition toward more viable and environmental friendly agrosystems. A mobilizing element in the cooperatives was the ability of some dairy farmers to obtain high herbage and milk yield production with limited... |
| Tipo: Peer-Reviewed Insight |
Palavras-chave: Agroecosystems; Dairy farming; Panarchy; Northern Frisian Woodlands The Netherlands; Resilience; Soil organic matter. |
| Ano: 2011 |
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| Cabell, Joshua F; Department of Plant and Environmental Sciences, Norwegian University of Life Sciences; josh.cabell@gmail.com; Oelofse, Myles; Department of Agriculture and Ecology, Copenhagen University; myles@life.ku.dk. |
| Taking departure in the theory of resilience in social-ecological systems, we present an analysis and discussion of how resilience theory can be applied to agroecosystems. Building on the premise that agroecosystems are too complex for resilience to be measured in any precise manner, we delineate behavior-based indicators of resilience within agroecosystems. Based on a review of relevant literature, we present and discuss an index of 13 such indicators, which, when identified in an agroecosystem, suggest that it is resilient and endowed with the capacity for adaptation and transformation. Absence of these indicators identifies points of intervention for managers and stakeholders to build resilience where there is vulnerability. The indicators encompass... |
| Tipo: Peer-Reviewed Synthesis |
Palavras-chave: Adaptive cycle; Agroecosystems; Behavior-based indicators; Resilience; Social-ecological systems. |
| Ano: 2012 |
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| The ability of agroecosystems to provide food ultimately depends on the regulating and supporting ecosystem services that underpin their functioning, such as the regulation of soil quality, water quality, soil erosion, pests, and pollinators. However, there are trade-offs between provisioning and regulating or supporting services, whose nature at the farm and plot scales is poorly understood. We analyzed data at the farm level for two agroecosystems with contrasting objectives in central Mexico: one aimed at staple crop production for self-subsistence and local markets, the other directed to a cash crop for export markets. Bivariate and multivariate trade-offs were analyzed for different crop management strategies (conventional, organic, traditional, crop... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Agroecosystems; Avocado; Ecosystem services; Maize; Mexico; Trade-offs. |
| Ano: 2015 |
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| GIONGO, V.; SILVA, D. J.; SALVIANO, A. M.; CUNHA, T. J. F.; FIGUEIREDO, M. C. B. de. |
| Objetivando mitigar e reverter esses processos de degradação na produção irrigada de frutícolas no Semiárido, foi proposto modelos de agroecossistemas multifuncionais sustentáveis, a partir da premissa de aumentar a biodiversidade e diminuir o revolvimento do solo. Esses agroecossistemas utilizam como ferramentas o cultivo de coquetéis de espécies de plantas de coberturas, mínimo revolvimento do solo ou semeadura direta dos cultivos na entrelinha, manejo integrado e racional de insumos externos, energia e água, objetivando o aumento da produtividade e da qualidade dos frutos, maximização do lucro, mitigação dos impactos ambientais e das pegadas hídricas e de carbono. |
| Tipo: Folhetos |
Palavras-chave: Serviço ambiental; Pegada hídrica; Pegada de carbono; Serviço ecossistêmico; Implantação dos agroecossistemas; Ecossistema; Carbono; Irrigação; Fruticultura; Recuperação do Solo; Relação Solo-Planta; Degradação Ambiental; Planta de Cobertura; Impacto Ambiental; Impacto Econômico; Agroecosystems; Fruit trees; Semiarid soils; Semiarid zones. |
| Ano: 2021 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1131483 |
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| FARIAS, J. L. de S.; MESQUITA, A. M. S.; FERNANDES, F. E. P.. |
| A Caatinga vem sendo utilizada desde tempos do pré-descobrimento como fonte de alimentos para a população humana, seja pela ação catadora de frutos e caçadora pelos indígenas, seja pela exploração agrícola, pastoril e madeireira, intensificadas a partir da colonização pelo homem branco. As características edafoclimáticas da Caatinga impõem severas restrições aos diversos tipos de exploração agrícola de base intensiva, privilégio possível, apenas para alguns setores, porém inviável na maior parte de seu território. Por sua vez, a Agroecologia tem referenciado os Sistemas Agroflorestais (SAFs) como um modelo de produção de alimentos fundamentados no funcionamento dos ecossistemas naturais. Neste contexto, os SAFs podem surgir a partir da interface entre... |
| Tipo: Folhetos |
Palavras-chave: Sistemas agroflorestais; SAFs; Transição agroecológica; Agroecologia; Processo participativo; Sistematização de experiências; Semiárido; Brasil; Agricultura Familiar; Agricultura Sustentável; Desenvolvimento Sustentável; Caatinga; Comunidade Rural; Small farms; Rural communities; Rural development; Rural families; Agroecosystems; Agroecology; Brazil; Semiarid zones. |
| Ano: 2018 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1101487 |
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| Registros recuperados: 39 | |
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