Institute Ciencias Agrarias UFU
Institute Ciencias Agrarias UFU
Peixoto M.G.,Federal University of Sergipe |
de Oliveira A.C.L.,IFS |
Silva J.H.S.,Graduado em Agronomia UFS |
Luz J.M.Q.,Institute Ciencias Agrarias UFU
Bioscience Journal | Year: 2017
The aim of this work was to develop an in vitro conservation protocol for Lippia alba that involved mineral oil and to study the leaf anatomy of L. alba genotypes in in vitro and ex vitro environments. In vitro conservation involved five genotypes; LA-13 and LA-57 (carvone chemotype); LA-22 (linalool chemotype); and LA-29 and LA-44 (citral chemotype). Each genotype was treated with mineral oil, with water, and a control at 18°C and 23°C. Survival (%), shoot height (cm) and leaf color were assessed at 180 and 270 days. The genotypes with the best in vitro conservation outcomes (LA-13 and LA-57) were used to study the anatomy of the leaves. Midrib thickness, leaf blade thickness, adaxial and abaxial cuticles and the number of glandular and tector trichomes were assessed. A temperature of 18°C was optimal for the conservation of genotypes of the carvone chemotypes. The explants were short and had green leaves. This was especially true for LA-57, whose height did not exceed 2.0 cm. At 270 days, the LA-13 and LA-57 genotypes continued to have green and viable leaves, especially LA-57, which had the lowest mean height. Field plants of the carvone chemotype had thicker midribs, leaf blades, and cuticles and had more trichomes. The LA-57 genotype had the most glandular and tector trichomes. © 2017, Universidade Federal de Uberlandia. All Rights Reserved.
Resende T.M.,Federal University of Uberlandia |
de Moraes E.R.,Federal University of Uberlandia |
Franco F.O.,Federal University of Uberlandia |
Arruda E.M.,Federal University of Uberlandia |
And 4 more authors.
Bioscience Journal | Year: 2012
The region of Mining Triangle is inserted in the Cerrado, with 66.79% of its area under Oxisols Reds, who have low natural fertility and high levels of exchangeable aluminum, requiring correction and fertilization for insertion in the production process. The physical attributes of the soil are good indicators of its quality and permits monitoring of areas that suffered some type of interference, determining the best use of that which causes less degradation. Therefore, this study aimed to evaluate the structure of an Oxisol in the Cerrado area in the region of Minas Gerais, Uberlandia, MG, under different uses and receiving organic wastes. With the intervention of the research, wastes generated in the activities related to animal production can leave the condition of polluting the environment to the condition of basic materials of high added value for agriculture, therefore, beyond action fertilizer that are present and conditioning effects repair of physical attributes of soils, could mean, then, a factor of adding value both for the activity of intensive rearing, agriculture and environment. The transformation of the native savannah in production environments changed the soil structure. The conversion to pasture areas and crops (corn and sugar cane) decreased macroporosity and increased soil density. This conversion also influenced the state of aggregation of soil, measured by the increase in the dispersion of clay fraction.
Lana R.M.Q.,Federal University of Uberlandia |
Rezende R.V.,Federal University of Minas Gerais |
Lana A.M.Q.,Federal University of Minas Gerais |
Silva A.A.,Institute Ciencias Agrarias UFU |
And 2 more authors.
Bioscience Journal | Year: 2014
This study aimed to evaluate the dynamics of the micronutrients iron and manganese in the soil, resulting from fertilization with organic manure and mineral fertilization on cane sugar. The experiment was conducted in Uberlândia-MG, in the experimental area of the Mining Company of Sugar and Alcohol of Minas Gerais Ltda. The experiment was arranged in a complete randomized blocks with factorial split-plot in space 5×2×6 (type of fertilizer, gypsum and depth). The variety of sugar cane was planted 867, 515 RB medium cycle / late. The treatments, applied at the bottom of the furrow, were the sources of fertilizers poultry litter, bedding turkey, cattle manure, compost and mineral fertilizer, all combined with and without agricultural gypsum. There were soil samples for analysis of iron and manganese, taken along the lines of planting depths 0-15, 15-30, 30-45, 45-60, 60-75, 75-90 cm. The interaction manure without application of agricultural gypsum had the highest content of iron and manganese. There was an increase in the levels of iron in the agricultural gypsum treatments with mineral fertilizer, turkey litter and composted manure. The agricultural gypsum didn't increase the levels of manganese in the soil. There was an increase of manganese with the use of poultry litter and cattle manure in the absence of gypsum. There was no mobilization along the profile of the iron manganese applications of agricultural gypsum.
da Cunha J.P.A.R.,Institute Ciencias Agrarias UFU |
da Silva L.L.,Institute Ciencias Agrarias UFU
Revista Ciencia Agronomica | Year: 2010
This study aimed to evaluate the effect of the aerial and ground application of fungicide in the control of corn diseases and in the spray deposition on the canopy. The hybrid AG7010 was sown and the spray deposition on the bottom, middle and upper canopy of the crop, disease severity and yield were evaluated after the application of the fungicide (pyraclostrobin + epoxiconazol), at the V8-V10 stage. The aerial application was accomplished with spray volumes of 15 and 30 L ha-1, using flat-fan spray nozzles, and the ground one with 100 L ha-1, using turbo twin flat-fan and air induction turbo flat-fan spray nozzles. An additional treatment that received no fungicide was also evaluated. The study of the deposition was achieved using water sensitive papers. It was concluded that that the conventional treatments presented larger droplet density in the corn canopy; however all of the treatments provided the minimum deposition recommended for fungicide application. The aerial application using spray volume of 30 L ha-1 provided similar yield to the conventional treatments, showing to be technically feasible to use.
de Melo Junior H.B.,Federal University of Uberlandia |
Borges M.V.,Federal University of Uberlandia |
Domingues M.A.,Federal University of Uberlandia |
Borges E.N.,Institute Ciencias Agrarias UFU
Bioscience Journal | Year: 2012
We evaluated the action putrefactive Californian worms (Lumbricus rubellus) in the chemical composition of an organomineral fertilizer produced from the mixture in different proportions of organic waste is not degraded in the rumen of cattle (ROND), Chicken manure (CFG) dolomitic limestone (Cal D) and 4-14-8 granular mineral fertilizer (FM). The experimental design was randomized blocks with nine treatments consisting of ROND; ROND + Cal D; ROND + ROND + Cal D + FM (four concentrations) and Cal D + CFG (three concentrations) and, with three replicates, which were subjected to vermicomposting for a period of 80 days under controlled conditions of humidity and temperature. Among the chemical characteristics evaluated, it was observed that the best effect of the use of poultry litter has been a source of P 2O 5, and phosphorus availability was increased through the use of lime. However, liming showed a significant effect in reducing the nitrogen content in the compost. The loss of nitrogen was observed in all treatments, and to a lesser extent in the treatment where residues were used only under the action of earthworms rumen. Regarding the use of raw materials with C:N ratio low, we observed greater loss of nitrogen, and recommended addition to the mix carbonrich materials. The use of vermicompost in combination with other materials used showed significant benefits in improving the chemical composition of the organomineral fertilizer.