Poços de Caldas, Brazil
Poços de Caldas, Brazil

Time filter

Source Type

Fonseca e Cruz C.A.,Instituto Estadual Of Florestas | de Paiva H.N.,Federal University of Viçosa | da Cunha A.C.M.C.M.,Instituto Federal Of Educacao | Neves J.C.L.,Federal University of Viçosa
Ciencia Florestal | Year: 2011

Senna macranthera has great natural occurrence, with potential use in the recovery of degraded areas. However, there is need for information on the nutrition of native forest species. In that sense, the objectives of this study were to evaluate the effect of doses of N, P, K, Ca, Mg and S on growth and quality indices of seedlings of Senna macranthera and to determine their recommended doses. This study was carried out in a greenhouse, using a Red Yellow Argisol, removed from the layer below 20 cm depth, as substratum. The experiment was designed in a Baconian Matrix, and three doses of the six macronutrients and two additional treatments were evaluated, one with reference doses (fertilizer used by default for native species) and the other one without the addition of nutrients. An entirely casualized design was adopted, with four repetitions. The morphologic parameters and quality indices of seedlings were analyzed. Through orthogonal contrasts, a significant response of all the variables studied was verified in relation to the macronutrients applied. The species was most demanding of P and K in comparison to the other macronutrients, and the recommended doses were of 600 mg dm-3 of P and 200 mg dm-3 of K. It is recommended that further studies with lower doses of the nutrients N, Ca, Mg and S be carried out, since, according to this study, the best doses for these nutrients were found for the original soil used as substrate and the lowest dose of the applied treatment.


Santana A.P.,Federal University of Minas Gerais | Santana A.P.,Instituto Estadual Of Florestas | Isaias R.M.S.,Federal University of Minas Gerais
Acta Botanica Brasilica | Year: 2014

Galls are well distributed across the World and among plant families. Their diversity can support the status of conservation of an area as an urban park, once inventories are presented. These inventories also help to understand the morphological patterns of the galls, based on their most common shape, color, host botanical families, inducers and galled organs. This study is about an inventory of galls at Parque Estadual Serra Verde, Brazil. This conservation unit is an urban park strongly anthropized in a transition area of Cerrado and Mata Atlântica. Galls from four different trails were observed, and collected monthly during one year. The terminology morphospecies was used to distinguish the galls because the identification of the inducers were not always possible. Seventy five morphospecies of galls belonging to 43 host plant species of 24 botanical families were observed. Mostly of the galls was induced by Diptera:Cecidomyiidae, in Fabaceae and Myrtaceae. The most common traits were the globoid shape and green color. The leaves were the most frequent galled organ and followed by the stems. All these tendencies had been already observed in other inventories. Comparing current results with other studies at similar areas, we can assume that the Parque Estadual Serra Verde is very important for conservation. Urban green areas are subject to high disturbance and degradation but also increase the quality of life for the population inhabiting the areas nearby. The diversity of galls at Parque Estadual Serra Verde reflects an area with high levels of stress but with moderate botanical diversity. These features make this protected area an important site for the continuous conservation and regeneration, and highlight the environmental value of Parque Estadual Serra Verde. © 2014, Sociedade Botanica do Brasil. All rights reserved.


Fonseca e Cruz C.A.,Instituto Estadual Of Florestas | da Cunha A.C.M.C.M.,Instituto Federal Of Educacao | de Paiva H.N.,Federal University of Viçosa | Neves J.C.L.,Federal University of Viçosa
Revista Arvore | Year: 2011

Peltophorum dubium is a fast growing tree species, rustic and excellent for using in mixed forestation in degraded areas. Due to lack of information on the nutrition of this species, the objective of this work was to evaluate the effect of doses of N, P, K, Ca, Mg and S on the growth, biomass production and quality indexs of H/D, H/MSPA, MSPA/MSR and IQD seedlings, and to determine the recommended doses of those elements. In this work, carried out in a greenhouse, a dustrophycous red yellow latosoil was used as substratum. The experiment was designed in a Baconian Matrix, evaluating three doses of the six macronutrients and two additional treatments, one with reference doses and the other one without the addition of nutrients. It was used a complete random experimental design with four replicates. It was noted through the orthogonal contrasts, a significant response of all the variables studied with the application of macronutrients. The nutrients with the best significant effects were P and Mg, and the recommended doses were 600 mg/dm 3 of P, 0.2 cmolc/dm 3 of Mg, and minimum doses of 50 mg/dm 3 of K and 0.8 cmolc/dm 3 of Ca. It was not verified response to application of N and S, for any of the characteristics evaluated, which indicates that the species have a low need of these nutrients.


Do Nascimento I.A.,Federal Rural University of Rio de Janeiro | Braz-Filho R.,State University of Norte Fluminense | De Carvalho M.G.,Federal Rural University of Rio de Janeiro | De Carvalho M.G.,Federal University of Rio de Janeiro | And 2 more authors.
Quimica Nova | Year: 2012

This the first phytochemical investigation of Mimosa artemisiana (Leguminosae-Mimosoideae) describing the isolation and identification of quercitrin, myricitrin, 3,5,4'-trihydroxi-6,7-dimethoxyflavone (6,7-dimethylkaepferol), flavolignans, 3-O-β-D-glucopyranosil sitosterol, lupeol, sitostenone, stigmastenone, campestenone, sitosterol, stigmasterol, campesterol, methyl indole-3-carboxilate and indole-3-carboxaldehyde in the extracts from the leaves and wood of this plant. This is the first registry of 6,7-dimethoxy,4'-hydroxy-flavona and the flavonolignans in this genera. The isolation of all metabolites was made by chromatographic methods and the structures were established on the basis of IR, MS, 1H and 13C NMR spectra analysis, comparison with literature data and GC-MS of mixtures analysis.


Pereira J.A.A.,Federal University of Lavras | Goulart R.M.,Instituto Estadual Of Florestas | Silva M.L.N.,Federal University of Lavras | Loschi R.A.,Instituto Estadual Of Florestas | And 2 more authors.
Revista Brasileirade Ciencias Agrarias | Year: 2012

The objective of the current study was to evaluate chemical and physical soil properties in different site conditions of a gully in the county of Nazareno, Campo das Vertentes region, Minas Gerais State, Brazil. Six transects were located along the gully water insurgency, with the purpose evaluating the moisture gradient, along the slope segments humid depression and lower, medium and upper slope sections. In these segments, soil samples were collected for determination of chemical properties, particle size distribution, penetration resistance and moisture content. The results of the moisture content measurements (Standard Oven Method) were: 38 % - 47 % for the humid lowland - lower slope interface; 28 % - 38 % for the medium slope position; and 17 % - 36 % for the upper slope. Soil temperature showed an inverse relationship with soil moisture, varying from 26° C in the upper slope (area 4) and 15° C in the lower slope (area 1). The application of the Principal Component Analysis (ACP) showed high complexity of the environment: the lower slopes presented an increased correlation with soil moisture, sand content and base saturation, whilst the upper slopes correlated better with soil penetration resistance and silt content.


do Nascimento D.F.,Aloisio Amancio | dos Santos Leles P.S.,Federal Rural University of Rio de Janeiro | de Oliveira Neto S.N.,Federal University of Viçosa | Moreira R.T.S.,Instituto Estadual Of Florestas | Alonso J.M.,Federal Rural University of Rio de Janeiro
Cerne | Year: 2012

This work veriflied the influence of planting spacing on the initial growth of six forest species, at the age of 22 months, in plantations of forest recomposition in the Guandu River Basin. The experiment was installed in the SFE - thermoelectric power plants Barbosa Lima Sobrinho, located in the City of Seropédica-RJ. Forty eight tree species were planted, using the spacings, 1.0 x 1.0, 1.5 x 1.5, 2.0 and 2.0 x 3.0 x 2.0 m, which are the study treatments. At 22 months after planting, it was evaluated the growth in height, diameter at ground level (DNS) and area of the canopy for the species, Anadenanthera macrocarpa Benth. Brenan (angico vermelho), Schinus terebinthifolius Raddi (aroeira pimenteira), Schizolobium parahyba Blake (guapuruvu) Chorisia speciosa St. Hill (paineira), Cordia sp. (babosa branca) and Inga marginata (ingá). It was found that the studied species behaved in a different way in the differents spacing of planting, and that the planting density significantly influenced on the initial growth of all the species. In general, in wider planting spacings, the plants had higher growth.


dos Santos Neto J.A.,State University of Montes Claros | Fontes R.L.F.,Federal University of Viçosa | Victor Hugo Alvarez V.,Federal University of Viçosa | Neves J.C.L.,Federal University of Viçosa | And 3 more authors.
Revista Brasileira de Ciencia do Solo | Year: 2015

Information on rates of nutrient recovery by extractants as a function of added doses of the nutrients is scarce, yet necessary for fertilization and liming recommendation systems. The aim of this study was to determine boron recovery rates by boiling water and boiling CaCl2, with and without liming, in soils of the States of Bahia and Minas Gerais, Brazil. We set up three experiments under greenhouse conditions using a (6 × 2 + 9) × 6 factorial arrangement, consisting of six soils with and without liming, nine soils without liming, and six application rates of B. A randomized block design was used, with three replicates. Experimental units consisted of 0.6 dm3 of soil. We calculated the liming rate based on soil analysis, following the recommendation for the State of Minas Gerais. After 15 days of incubation, the soils received different application rates of B (0, 1.5, 3, 6, 9, and 15 mg dm−3); they then underwent an additional 45-day incubation period. Boric acid (H3BO3) was the B source. After incubation, available B contents were extracted by boiling water and boiling 5 mmol L−1 CaCl2. Azomethine-H reagent was used for B detection. Regression and correlation analyses for the variables were carried out. The B extracted from the soil by boiling water and boiling CaCl2, regardless of liming, increases in a linear manner with the increase in the application rates of this nutrient in the soils. The boiling water and boiling CaCl2 extractants proved not to be sensitive to liming. Rather, the rates of B recovered from the soils by the extractants used vary according to organic matter content, clay quantity and quality, and the moisture equivalent. The extractants used had high correlation in extraction of B from the soil. © 2015, Revista Brasileira de Ciencia do Solo. All rights reserved.


Guadanucci J.P.L.,São Paulo State University | Guadanucci J.P.L.,Federal University of Minas Gerais | Braga P.L.M.,Instituto Estadual Of Florestas | Sa F.D.S.,Federal University of Minas Gerais
Journal of Natural History | Year: 2015

Records of mygalomorphs inhabiting caves have increased in the past years. We present data on a population of Trechona sp. spiders, found in a quartizite cave in Diamantina, Minas Gerais, Brazil. The spiders and their retreats were marked, and this population was followed for 17 months. The population consisted of up to 100 individuals, comprising the worlds’ largest known cave-dwelling population of mygalomophs. The estimated population size (Jolly-Seber model) varied from 50.36 to 853.43, the latter considered much overestimated. We did not find individuals of Trechona sp. in the surrounding epigean areas. The number of spiders was higher in the entrance zone than in the other two zones (twilight and dark zones). We found that individuals at the entrance zone showed similar activity to a nocturnal spider, whereas the other two groups showed conspicuous differences from this pattern, spending longer periods without rest, on the sheet-web as a sit-and-wait predator. © 2014 Taylor & Francis.

Loading Instituto Estadual Of Florestas collaborators
Loading Instituto Estadual Of Florestas collaborators