Agricultural Ecology
Mostrando 25-36 de 49 artigos, teses e dissertações.
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25. Estrutura e dinâmica da família sertaneja : estudo exploratório das famílias agricultoras da região do Maciço de Baturité/CE
The main objective of the study is to get know some aspects of the structure and dynamics of the agriculturist families of the Maciço de Baturité/CE region, that are related to the Familiar Agriculture, Agroecology and Market Project (AFAM), that disclosures in the above mentioned region, the practice of the ecological agriculture based on the maintainable
Publicado em: 2007
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26. Indicadores de qualidade do solo sob sistema de produção agrícola convencional em conversão para agroecológico
Microbial and biochemical indicators of soil quality, mainly those related to carbon and nitrogen cycling, are useful to access the effect of soil management and its effects on the sustainability of the agroecosystems. The aim of this work was to access changes occurring in the soil due to the transition from conventional to agroecological agricultural syste
Publicado em: 2007
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27. A paisagem como elemento de sustentabilidade do Vale do RibeirÃo da Prata
The Vale do RibeirÃo da Prata is located in the edges of the Bulk of the MaciÃo de PoÃos de Caldas, in the cities of Ãguas da Prata and SÃo JoÃo da Boa Vista. The valley is part of the Serra da Mantiqueira, region of mounts, with hillsides of accented declivity and is formed by a great amount of springs that if originate in the hillsides and the tops o
Publicado em: 2007
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28. The humic fractions of a Luvissol under different agroforestry systems in the city of Sobral / FraÃÃes hÃmicas em luvissolos sob diferentes sistemas agroflorestais no municÃpio de Sobral - CE
Investigations about agroforestry systems, which has been carried out in the arid region in Ceara, Brazil, comparatively to a conventional tillage system in the same area, showed an increase in the concentration of fulvic fraction (FAF) and humic acid (FAH) fractions. These results are related to the conditions in which soil was plowed similar to what is usu
Publicado em: 2007
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29. DOSSIÊ DE AMBIÊNCIA E TRANSIÇÃO AGROECOLÓGICA NO MANEJO DA MICROBACIA HIDROGRÁFICA DO LAJEADO BIGUÁ, ALECRIM-RS / AMBIENCE DOSSIER AND AGRO ECOLOGY TRANSITION IN THE MANAGEMENT IN THE WATERSHED OF LAJEADO BIGUÁ, ALECRIM - RS
The atrophic disordinated action over an area leads to degradation of the natural resources, mainly the soil, water and native vegetation, changing the landscape, altering the ambience and bringing negative consequences to the social and economical conditions of the population. In such context, the current study had as its aims assess, through an ambience do
Publicado em: 2007
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30. Assessment in the global warning context : case study Monjolinho rural basin, Piracicaba, São Paulo, Brazil / Avaliação de cenarios no contexto do aquecimento global : estudo de caso da bacia rural do Monjolinho, Piracicaba-SP
One of the global warming effects is the increase of extreme rainfalls, which can cause many negative impacts to rural areas, such as floods and erosion. So, it is important that an equitable land use is distributed along river basins, especially in the ones where there are agricultural fields, since it can help to minimize runoff and soil erosion caused by
Publicado em: 2007
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31. Distribution and abundance of birds in relation to land use in Passa-Cinco river basin, state of São Paulo, Brazil / Distribuição e abundância de aves em relação ao uso da terra na bacia do rio Passa-Cinco, estado de São Paulo, Brasil
Landscape mosaics composed by fragments of natural vegetation and artificial habitats are becoming widespread all around the world due mainly by agriculture. For this reason, wildlife inventories and conservation programs should take into account not only pristine habitats but also agroecosystems. This study is part of a multitaxa survey carried out at the s
Publicado em: 2006
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32. CHARACTERIZATION OF ENVIRONMENTAL CHANGES BY USE OF NATURAL RESOURCES FOR WORKERS IN RURAL HIGH COURSE PERICUMÃ RIVER / CARACTERIZAÇÃO DAS ALTERAÇÕES AMBIENTAIS SEGUNDO O USO DOS RECURSOS NATURAIS POR TRABALHADORES RURAIS NO ALTO CURSO DO RIO PERICUMÃ.
The characterization of the environment changes from the development of activities is approached in this study caused by human activities in their different ways of interaction society-nature, in the area of the high course of river Pericumã, one of the main basins of the area called Baixada Maranhense. It was considered that the population that use natural
Publicado em: 2006
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33. Indicadores de sustentabilidade em sistemas agroecolÃgicos por agricultores familiares do semi-Ãrido cearense / AgroecolÃgicos pointers of sustentabilidade in system lead by family agriculturists at the Cearà state semiarid
To evaluate the farmerâs perception about the changes in their systems and in some production pointers, the present work was developed with farmers that adopt cotton production systems in agroecolÃgicas bases at the Cearà state semiarid. The cotton plant production proposal in the commented bases has the effective participation of farmers in the whole pro
Publicado em: 2006
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34. Energetic balance in organic farming of vegetables / Balanço energético em cultivos orgânicos de hortaliças
The concerning with preservation of the natural sources and to the human health have been outstanding in the last decades. Therefore the organic agriculture has been developed in several countries, including Brazil, searching to attend these longings of the society. This mission can be reached with efficiently only if this agriculture is implemented in agric
Publicado em: 2006
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35. Nitrogen balance in paired small catchments (forest vs. pasture) in Rondonia state. / Balanço de nitrogênio em microbacias pareadas (floresta vs. pastagem) no estado de Rondônia.
The nitrogen cycle has been altered by anthropogenic activities, in response to the increment of cultures such, as the leguminous, fossil fuel use, and deforestation for agricultural uses and cattle raising. In temperate regions, there is considerable information about the biogeochemical cycle of nitrogen and the role of anthropogenic alterations on this cyc
Publicado em: 2005
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36. Nutrição e ecologia nutricional de cervídeos brasileiros em cativeiro e no Parque Nacional das Emas - Goiás / Nutrition and nutritional ecology of brazilian cervids in captivity and in the Emas National Park - Goias
There are limited data on energy requirements of brazilian cervids. Thus, it is difficult to succeed in their management and reproduction in captivity. Knowing the energy requirements is also important to determine the necessary nutritional resources for their conservation in parks and reserves. The first objective was to study the nutritional requirements o
Publicado em: 2005