Navegando por Assunto "Manejo dos solos"

Agora exibindo 1 - 4 de 4

Acesso aberto (Open Access)
Avaliação econômica de sistemas agroflorestais no nordeste paraense: os sistemas agroflorestais como instrumento de política pública de desenvolvimento socioeconômico e ambiental regional
(Universidade Federal do Pará, 2013-01-08) OLIVEIRA, Dimitri Maurício Queiroz de; ALMEIDA, Oriana Trindade de; http://lattes.cnpq.br/0325909843645279
This study aims to evaluate the economic viability of two agroforestry (SAF) in the municipality of Tomé First proceeded to the literature of the legal requirements for the use of specially protected areas, then sought to frame the agroforestry systems over an optical environmental and socio- economic, as an instrument of use and recovery of these areas by evaluating the economic returns from two models of SAF observed in Tomé-Açú. For the progress and completion of this study utilize is a documentary research, bibliographical and field research through interviews with local actors production chain in the city of Tome - Açú. The methodology des survey data used for this study was the semi-structured interviews with local stakeholders. The tabulation of this date, as well as the results of analyzes was performed with concepts economic-mathematical engineering economic evaluation of investment projects through cash flow, NPV, IRR and Rb/c of arrangements. The conclusion discusses the concept of viability-studied arrangements for the current economic scenario of cultures composing the models studied as an alternative source of investment.
Acesso aberto (Open Access)
Boas práticas agrícolas: análise de viabilidade financeira em propriedades sojicultoras e pecuaristas do Nordeste Mato-Grossense
(Universidade Federal do Pará, 2010-06-22) CHIACCHIO, Jayne Isabel da Cunha Guimarães; ALMEIDA, Oriana Trindade de; http://lattes.cnpq.br/0325909843645279
According to data from PRODES / INPE (2008), from 1988 to 2008, 369,154 km ² were deforested in the Amazon, an annual average of 17,578 km ². This process has been driven primarily by expansion of cattle ranching and agriculture. Several policies have been created to reduce deforestation. And these are targeted, usually by command and control instruments. A recent innovation, however, has been the search for improvements in environmental quality in medium and large farms through the introduction of Good Agricultural Practice (GAP). Based on this, this paper aims to examine whether the introduction of BPA in medium and large soy farms and ranches located northeast of Mato Grosso represents a financially viable alternative. The survey was conducted in five municipalities located northeast of Mato Grosso, in the Xingu watershed: Água Boa, Canarana, Querência, Bom Jesus do Araguaia and São Félix do Araguaia. First, we collected detailed data from activities in the region of study. For that, 40 farmers were interviewed (20 soy farmers and 20 ranchers). The second step raised the cost data of adoption of good practices on 14 soy farms and ranches found in the Registry of Social-Environmental Responsibility (RSR) of the Aliança da Terra (AT)/Instituto de Pesquisa Ambiental da Amazônia (IPAM). For the analysis of financial viability of Good Practice, we used three instruments: simple return, net present value (NPV) and internal rate of return. The results showed that BPA is capable of implementation, but there is a financial loss for the producer when he chooses to adopt BPA. However, opportunities for gains from adoption of BPA (such as the receipt by REDD, increased productivity, increased selling prices, among others) can reduce these "losses" and equalize the gains to production without BPA.
Acesso aberto (Open Access)
Diagnóstico dos usos múltiplos das águas da bacia do rio Tracuateua - PA e sua associação com as formas de uso e cobertura do solo
(Universidade Federal do Pará, 2016-03-17) SILVA, Dhne Maria Pereira da; ROCHA, Edson José Paulino da; http://lattes.cnpq.br/2313369423727020; LIMA, Aline Maria Meiguins de; http://lattes.cnpq.br/6572852379381594
The various uses of water in economic activities have caused significant changes in the quality and quantity of water resources. Currently, several studies and measures have been used by the federal and state governments in an attempt to reduce the changes of the natural environment caused by the intensification of unsustainable economic activities. From this premise, the study of the river basin Tracuateua aimed to identify the forms of water use and its association to human disturbance factors with greater interference on water resources of the municipality, and propose ways of management and management. To achieve the goal was executed: primary data collection in the field, the characteristics of the basin under study, and secondary, associated with map information, physical and socioeconomic characteristics; interviews to assess the performance of municipal management, representative civil society and of farmers; questionnaires to farmers, livestock farmers and residential users; and evaluation of information on federal and state projects for encouraging conservation practices and recovery of natural resources. Data were associated with the use of classes and soil cover of the study area, obtained by TerraClass project. The results showed that the region has a water user profile associated mainly to domestic uses and agriculture, where the threat to water resources is mainly due to the inadequate relationship between the forms of use and occupation of land and conservation of the basin, with a view to the water supply, in addition to problems related to aspect of sanitation to meet local demand. It is observed that the absence of municipal management of water resources and inadequate forms of occupation and management of land and water has contributed to the impairment of the availability of water in quantity and quality.
Acesso aberto (Open Access)
Microbial biomass and soil chemical properties under different land use systems in Northeastern Pará
(2011-08) LOPES, Elessandra Laura Nogueira; FERNANDES, Antonio Rodrigues; RUIVO, Maria de Lourdes Pinheiro; CATTANIO, José Henrique; SOUZA, Gladys Ferreira de
The increase in agricultural production in the Brazilian Amazon region is mostly a result of the agricultural frontier expansion, into areas previously influenced by humans or of native vegetation. At the same time, burning is still used to clear areas in small-scale agricultural systems, leading to a loss of the soil productive capacity shortly after, forcing the opening of new areas. This study had the objective of evaluating the effect of soil preparation methods that involve plant residue shredding, left on the surface or incorporated to the soil, with or without chemical fertilization, on the soil chemical and biological properties. The experiment was conducted in 1995, in an experimental field of Yellow Latosol (Oxisol) of the Embrapa Amazônia Oriental, northeastern Pará (Brazil). The experiment was arranged in randomized blocks, in a 2x6 factorial design, with two management systems and six treatments evaluated twice. The management systems consisted of rice (Oriza sativa), followed by cowpea (Vigna unguiculata) with manioc (Manihot esculenta). In the first system the crops were planted in two consecutive cycles, followed by a three-year fallow period (natural regrowth); the second system consisted of one cultivation cycle and was left fallow for three years. The following treatments were applied to the secondary forest vegetation: slash and burn, fertilized with NPK (Q+NPK); slash and burn, without fertilizer NPK (Q-NPK); cutting and shredding, leaving the residues on the soil surface, fertilized with NPK (C+NPK); cutting and shredding, leaving residues on the soil surface, without fertilizer (C-NPK); cutting and shredding, with residue incorporation and fertilized with NPK (I+NPK); cutting and shredding, with residue incorporation and without NPK fertilizer (I-NPK). The soil was sampled in the rainier season (April 2006) and in the drier season (September 2006), in the 0-0.1 m layer. From each plot, 10 simple samples were collected in order to generate a composite sample. In the more intensive management system the contents of microbial C (Cmic) and microbial N (Nmic) were higher, while the C (Corg) level was higher in the less intensive system. The treatments with highest Cmic and Nmic levels were those with cutting, shredding and distribution of biomass on the soil surface. Under both management systems, the chemical characteristics were in ranges that classify the soil as little fertile, although P and K (in the rainy season) were higher in the less intensive management system.