Empresa de Pesquisa Agropecuaria e Extensao Rural Epagri

Campos Novos, Brazil

Empresa de Pesquisa Agropecuaria e Extensao Rural Epagri

Campos Novos, Brazil
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da Veiga M.,Empresa de Pesquisa Agropecuaria e Extensao Rural Epagri | Durigon L.,Autonomo | Pandolfo C.M.,Epagri | Balbinot Jr. A.A.,EMBRAPA - Empresa Brasileira de Pesquisa Agropecuária
Ciencia Rural | Year: 2012

Continued use of the crop-livestock system in agricultural areas can promote changes in soil physical attributes, as well as affect the productivity of crops grown in rotation with pasture. The aim of this study was to evaluate the effects of methods of sowing and the interval between the withdrawal and desiccation of pasture on soil physical attributes, aboveground biomass of pasture and productivity of crops sown in succession. It was conducted an experiment in a rural property in Campos Novos, which uses the crop-livestok system, with the following treatments: two types of pasture seeding in autumn (direct seeding without and with subsequent soil harrowing), allocated in main plots, and four intervals of removing animals from the pasture before desiccation (removal of the animals at 28, 14 and 1 day before the desiccation and control, without grazing), allocated as subplots. It was determined the aboveground biomass of pasture, the soil physical attributes after desiccation of grassland and yield of soybeans and corn. The form of winter pasture seeding does not affect the soil physical attributes and crop productivity, while increasing the interval between the withdrawal and desiccation of winter pasture increases the production of the aboveground biomass of the pasture.

Branca G.,University of Tuscia | Hissa H.,Embrapa Solos e Superintendencia de Desenvolvimento Sustentavel | Benez M.C.,Empresa de Pesquisa Agropecuaria e Extensao Rural EPAGRI | Medeiros K.,Investment Center Division | And 4 more authors.
Land Use Policy | Year: 2013

This paper presents the results of the EX-Ante Carbon-balance Tool (EX-ACT) application on two rural development projects in Brazil. The analysis provides an estimate of project impact on GHG emissions and C sequestration indicating net mitigation potential: results show that the Santa Catarina Rural Competitiveness Project has the potential to mitigate 12.2Mt CO 2e and the Rio de Janeiro Sustainable Rural Development Project 0.85Mt CO 2e. Both projects are successful at promoting activities aimed at reducing rural poverty and also contribute to climate change mitigation, demonstrating the potential importance of sustainable agriculture (improved cropland and grassland management, expansion of agro-forestry systems and protection of forested areas) in delivering environmental services. EX-ACT has also been used as a tool to guide project developers in refining components and activities to increase project environmental benefits. Cost-benefit analysis shows that while both projects generate environmental benefits associated with climate change mitigation, the Santa Catarina Rural Competitiveness Project has significantly higher potential due to the size of the project area and the nature of activities, thus a higher likelihood of potential co-financing from climate finance sources. © 2012 Elsevier Ltd.

Miranda M.,Empresa de Pesquisa Agropecuaria e Extensao Rural Epagri | Miranda M.,University Of Passo Fundo | Scheffer-Basso S.M.,University Of Passo Fundo | Scheffer-Basso S.M.,Brazilian National Council for Scientific and Technological Development | And 5 more authors.
Revista Brasileira de Zootecnia | Year: 2012

This study assessed the effect of successive applications of pig slurry on the dry matter (DM) production and the nitrogen use efficiency of giant missionary grass along two years. A total of 55, 110, 165, 220 and 275 m3 of pig slurry/ha/year were applied in order to supply 100, 200, 300, 400 and 500 kg of total N/ha/year, respectively. These treatments were compared with the ammonium nitrate (200 kg of N/ha/year) source of N and with a control (no nitrogen application). Annually, nitrogen was applied in four divided doses, after the cutting of forage grasses, which takes place five times a year. The total DM yield did not differ between years and increased linearly as a function of pig slurry application, ranging from 2,698 kg of DM/ha/year (control) to 11,371 kg of DM/ha/year (275 m3 of pig slurry/ha/year). There was an increment of 32.3 kg of DM/m3 of pig slurry/ha or 17.7 kg of DM/kg of N/ha. The highest average daily DM accumulation rate (66.8 kg of DM/ha/day) was achieved with the highest pig slurry rate, from February/2007 to April/2008. Nitrogen use efficiency did not differ across pig slurry rates (19.0 kg of DM/kg of N), but it was lower than that obtained with ammonium nitrate (30.3 kg of DM/kg of N). The efficiency index of pig slurry ranged from 0.52 to 0.72. © 2012 Sociedade Brasileira de Zootecnia.

Kinceler L.M.,Federal University of Santa Catarina | Massignam A.M.,Empresa de Pesquisa Agropecuaria e Extensao Rural Epagri | Todesco J.L.,Federal University of Santa Catarina
KEOD 2011 - Proceedings of the International Conference on Knowledge Engineering and Ontology Development | Year: 2011

The importance of meteorological and hydrological data observation stations has grown substantially in recent years to meet the most diverse demands; ranging from environmental studies related to climate change and hydrological studies for water use, up to traditional monitoring work to prevent disasters through the use of forecast models of weather and water level control to contain the flow of rivers. The effort by governmental institutions, with support from the private sector expanded the network of observation stations in the State of Santa Catarina, Brazil. However, access to such data is still restricted to few technical people or to a group of users that access a web information system tailored for them. This paper presents the steps for developing a prototype of an ontology which serves to facilitate data access for web users not familiar with either specific concepts or the domain terminology. The goal for building the prototype is to understand the steps and implications using two complementary tools such as OntoKEM and Protégé for ontology construction.

Zabot V.,University Of Passo Fundo | Scheffer-Basso S.M.,UPF | Miranda M.,Empresa de Pesquisa Agropecuaria e Extensao Rural Epagri | Kotwittz D.K.,University Of Passo Fundo | Brustolin K.D.,Chapecó Region Community University
Ciencia Rural | Year: 2014

The morphogenesis of giant missionary grass (Axonopus jesuticus x A. scoparius) was evaluated in this study in response to the application of 0, 40, 80, 120, 160, and 200m³ ha-1year-1 of pig slurry, calculated to provide 0, 100, 200, 300, 400, and 500kg N ha-1year-1, respectively. The experiment was carried out in the fi eld, at Chapecó, Santa Catarina, Brazil, in 2010–2011. The doses were fractioned in four applications, performed after the pasture cuttings, during the growth season of the grass. Morphogenetic evaluations were performed weekly between 10/26/2010 and 12/07/2010 (spring), 12/14/2010 and 01/11/2011 (late spring/early summer), 01/18/2011 and 02/07/2011 (summer), and 02/15/2011 and 03/21/2011 (late summer). The leaf senescence, leaf elongation, and pseudoculm elongation rates, canopy and pseudoculm heights, leaf blade length, and tillering increased because of fertilization. The application of pig slurry as a source of nitrogen alters the tissue fl ow of giant missionary grass, which requires attention to pasture management in order to maximize the effi ciency of forage use and to prevent losses of herbage by leaf senescence. © 2014 Universidade Federal de Santa Maria. All rights reserved.

Travi M.R.L.,University Of Passo Fundo | Scheffer-Basso S.M.,UPF | Escosteguy P.A.V.,UPF | Brustolin K.D.,University Of Passo Fundo | And 2 more authors.
Ciencia Rural | Year: 2014

This study aimed to evaluate the morphogenesis of carpet grass fertilized for two years with pig slurry (PS). On the average of two years were applied 0, 51, 102, 153, 204 and 255m3 of PS ha-1, calculated to provide 0, 100, 200, 300, 400 and 500kg of N ha-1 year-1, respectively. The morphogenesis was evaluated in the spring and summer of 2008-2009 and 2009-2010, considering 10°C as threshold temperature to evaluate the thermal sum in degree-days (DD) between the samplings. The fertilization linearly increased the tiller number, tiller elongation rate, leaf elongation rate and leaf area index. There was no effect of the fertilization on pseudoculm elongation rate (0.004cm DD-1), leaf appearance rate (0.004 leaf tiller-1 DD-1) and phyllochron (274DD).

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