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Neri A.V.,Federal University of Vicosa | Soares M.P.,Instituto Federal Goiano Campus Rio Verde | Neto J.A.A.M.,Federal University of Vicosa | Dias L.E.,Federal University of Vicosa
Revista Arvore | Year: 2011

The objective of this work was to study species that can be tested in the recovery of Arsenio high concentration areas. Therefore, 10 cerrado areas degraded by gold exploration in Paracatu-MG, Brazil were studied. It was used the Braun-Blanquet cover value and abundance scale. The species were classified by the Raunkiaer life form. The areas were floristically compared by Sørensen index. Out of 197 woody and herbs morpho-species found, 102 were identified at specific level, 35 at genus level and 40 at family level. Twenty morpho-species could not be identified. There was a great floristic richness among sample units (21-53 species), which influenced the formation of three groups in floristic similarity analysis. The more abundant and probably more adapted species to the environmental conditions were Axonopus marginatus, Simarouba amara, Aristida ekmaniana, Digitaria ciliaris, Stylosanthes viscosa, Andropogon bicornis, Maprounea guianensis and Sabicia brasiliensis. The most frequent form of life was phanerophyte followed by hemicryptophyte and chamephyte. In the biological spectra, it was possible to visualize the different structure of the studied areas, emphasizing the environmental diversity present despite presenting low floristic richness.

Santos F.R.,Instituto Federal Goiano | Stringhini J.H.,Federal University of Goais | Minafra C.S.,Instituto Federal Goiano | Almeida R.R.,Instituto Federal Goiano Rio Verde | And 4 more authors.
Arquivo Brasileiro de Medicina Veterinaria e Zootecnia | Year: 2014

We conducted this work aiming to evaluate the effect of using the metabolizable energy of food, determined by different strains (AMEn Cobb and AMEn Isa Label), on diet formulation for slow growing broilers on the performance, carcass characteristics, biometrical morphometry measures of digestive organs and energetic values of the experimental diets. A total of 72 male broiler chickens, Isa Label, were used and the experiment followed a randomized blocks design with two treatments (feedstuff energy), and six replicates of six birds each. The averages were compared by Tukey test at 5% probability. The treatments consisted in formulating diets using the energy of corn and soybean meal determined by Cobb and Isa Label strains. The experiment was conducted in the starter phase and the birds consumed the diets for 28 days. The diet formulated based on AMEn Cobb or Isa Label did not affect the performance, biometrical and morphometry measures of digestive organs and carcass characteristics. However, the diet formulated according to AMEn Isa Label resulted in better caloric conversion, bioeconomic energetic conversion and lower deposition of abdominal fat. AMEn of the diets similar to those calculated levels were determined with the formulation based on AMEn of corn and soybean meal determined for theline Isa Label (2.750 x 2.728 kcal/kg). Values of AMEn of corn and soybean meal determined with Isa Label strains not affect the performance of slow growing broilers, but resulted in lower abdominal fat according to the desires of consumers for alternative poultry.

Cardoso D.F.,Sao Paulo State University | de Souza G.F.P.,Sao Paulo State University | Aspilcueta-Borquis R.R.,Sao Paulo State University | Araujo Neto F.R.,Instituto Federal Goiano Campus Rio Verde | And 6 more authors.
Journal of Dairy Science | Year: 2015

The diacylglycerol-O-transferase 1 gene is a positional and functional candidate for milk composition traits. The objective of this study was to evaluate the segregation of the variable number of tandem repeat polymorphisms in the regulatory region of diacylglycerol-O-transferase 1 gene in a water buffalo herd, and to assess the association of this mutation with milk production traits. For this purpose, 196 Murrah buffalo cows were genotyped by PCR. The association of the marker with total milk, fat, and protein yields at 305 d of lactation, milk fat and protein percentage, and somatic cell scores were evaluated by single-trait analyses using a generalized mixed model. Two segregating alleles were identified in the population. The allele with 2 repeats affected fat percentage favorably. The present results suggest that this polymorphism is an interesting marker to include in the genetic evaluation of buffaloes. © 2015 American Dairy Science Association.

Da Silva H.W.,Federal University of Lavras | Costa L.M.,Instituto Federal Goiano Campus Rio Verde | Resende O.,Instituto Federal Goiano Campus Rio Verde | De Oliveira D.E.C.,Instituto Federal Goiano Campus Ipora | And 2 more authors.
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2015

The hygroscopicity in seeds provide essential information to optimize the drying process, storage and packaging development. The objective of this study was to determine the sorption isotherms of pepper seeds (Capsicum chinense L.), variety Cabacinha for different conditions of temperature and water activity. The sorption isotherms were determined at temperatures of 10, 20, 30 and 40 °C using the static indirect method and the water activity (aw) for each moisture content of seeds was determined by Hygropalm Model Aw1 equipment. The mathematical models often used to represent the hygroscopicity of agricultural products were adjusted to experimental data. For a constant water activity, increase in temperature decreased the equilibrium moisture content of pepper seeds. The desorption isotherms exhibit sigmoidal shape of type II. The models of Cavalcanti Mata, Clayton Chen, Chung Pfost, Modified Chung Pfost, Modified Henderson and Henderson are suitable to represent the hygroscopicity of seeds of pepper Cabacinha for the temperature range of 10 to 40 °C and water activity of 0.213 to 0.975. © 2015, Departamento de Engenharia Agricola - UFCG/Cnpq. All rights reserved.

Schwerz T.,Instituto Federal Goiano Campus Urutai | Jakelaitis A.,Instituto Federal Goiano Campus Rio Verde | Teixeira M.B.,Instituto Federal Goiano Campus Rio Verde | Soares F.A.L.,Instituto Federal Goiano Campus Rio Verde | Tavares C.J.,Instituto Federal Goiano Campus Posse
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2015

The objective of this research was to evaluate the production of sunflower in the off-season, supplemented or not with irrigation and cultivated after the crops of soybeans, corn or palisade grass. The treatments were allocated in a randomized blocks design in split plot (2×3), the supplemental irrigation by center pivot and without irrigation in the plots, and in the subplots the crops predecessors: soybeans, corn and palisade grass, with four replications. The height, stem diameter, shoot dry weight, number of leaves per plant and leaf area were evaluated at 15, 30, 45, 60, 75 and 90 days after emergence of sunflower plants. Sunflower plants were tall under all cultivation conditions, without variability in the evolution of stem diameter and of number of leaves. Leaf area was less in sunflower plants grown under corn straw and palisade grass under non-irrigated conditions. No significant effects on yield components - mass of thousand seeds, head diameter and oil and grain yield were observed. After cultivation of soybean, sunflower plants produced greater dry mass of shoots and higher oil content in the seed compared to plants established under corn stalk. © 2015, Departamento de Engenharia Agricola - UFCG/Cnpq. All rights reserved.

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