Alves P.F.S.,State University of Montes Claros |
dos Santos S.R.,State University of Montes Claros |
Kondo M.K.,State University of Montes Claros |
Pegoraro R.F.,1000 Bairro Universitario |
Araujo E.D.,Federal University of Viçosa
Engenharia Agricola | Year: 2015
The feasibility of using sewage wastewater as a water and nutrient source for plants is an alternative to harness agricultural natural resource, observing its influence on the organic matter dynamics and soil energy. Our objective here was to evaluate the effects of applying different doses of effluent from a sewage treatment plant, in Janaúba - MG, Brazil, over the physical attributes of a soil grown with "Prata Anã" banana. From soil sample collection at depths of 0-20, 20-40, and 40-60 cm, we determined the following soil properties: soil density, total porosity, macroporosity, microporosity, organic matter, clay dispersed in water and stability of soil aggregate. The experimental design was in randomized blocks with four repetitions. Wastewater raising doses promoted increase in suspended solids, contributing to macroporosity reduction at 20-40 and 40-60 cm depths; as well as a reduction in organic matter within 0-20 cm layer. Clay dispersal was observed in the depths of 0-20 cm, being derived from an increase in sodium content. Concurrently, there was a reduction of soil aggregate stability.
Morais-Costa F.,1000 Bairro Universitario |
Bastos G.A.,1000 Bairro Universitario |
Soares A.C.M.,1000 Bairro Universitario |
Nunes Y.R.F.,State University of Montes Claros |
Geraseev L.C.,1000 Bairro Universitario
Revista Caatinga | Year: 2015
It was objective to evaluate the influence of vegetation structure in the selection of plant species by sheep in Cerrado (Brazilian savanna). The research was conducted in an area of Cerrado sensu stricto in the north of Minas Gerais between January 2009 and March 2010. A phytosociological survey conducted the anal-ysis of the vegetation structure, using the plot method. In the tree stratum were delimited 38 continuous plots of 20 m × 20 m. In the regenerant stratum, were allocated sub-plots of 5 m × 5 m. In herbaceous stratum were made two transects in the area of pasture and every 2 m, with the movable square of 0.50 cm × 0.50 cm, 283 points for each transect (566 m).To the identification of the selected species, were used three sheep of the breed Santa Inês, which were kept by grazing in the experimental area and accompanied by observers. In the vegetation were identified 1288 tree, 102 regenerating and 1388 herbaceous individuals, grouped in 117 species distributed in 72 genera and 33 families, among these species: Tachigali rugosa, Heteropterys by sonimifolia, Astronium fraxinifolium, Lantana fucata, Evolvulus sp. e Rhynchospora sp. were important. The selected spe-cies by sheep in grazing, both in the rainy and dry season, in more than 50% species were: Casearia sylvestris, Erythroxylum deciduum, Heteropterys by sonimifolia e Ximenia americana. The feeding preference of sheep in the rainy season was by the species of herbaceous stratum, in the dry period by the species of the tree and re-generating strata. These species are structural bio-indicators of the Cerrado biome, for the grazing of sheep. It is necessary to evaluate, identify and quantify the chemical compounds of selected vegetal species because these can act as nutritional bio-indicators and potential in sheep feeding. © 2015, Universidade Federal Rural do Semi-Arid. All rights reserved.