Porto Alegre, Brazil
Porto Alegre, Brazil
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Coser S.M.,Federal University of Viçosa | Ferreira M.F.S.,CCA UFES | Ferreira A.,CCA UFES | Saraiva S.H.,CCA UFES
Revista Brasileira de Fruticultura | Year: 2014

Brazil is one of the largest producers of guava, Psidium guajava L., of the world. Orchards from seminal propagation, owing to cross-pollination, result in large variability, allowing the selection of genotypes for crop improvement. The aim of this essay was to study the genetic diversity of genotypes selected from seminal origin orchard (named Cortibel I to XIII) and compare them to Paluma and Pedro Sato and Roxa genotype (purchased in nursery), by morphological and quality of fruit characteristics. There was divergence between Cortibel selections. Cortibel I was the most divergent between red pulp genotypes and between all the others, showing the best performance for fruit characteristics. CVIII and CIV genotypes obtained the best performance between light pulp genotypes. Cortibel selections presented similar performance about fruit quality to commercial crops, providing good material for use as new cultivars or for hybridizations in breeding programs. © 2014, Sociedade Brasileira de Fruticultura. All rights reserved.

Germination is a biological process that depends on adequate water supply to embryo development. Water deficit slows this process and depending on intensity and extent of this deficit may cause seed death. Nevertheless, it has not yet been reported whether seed size influences physiological potential, or tolerance to water stress. This study aimed at assessing the effects of seed size, as well as of water stress on germination of the seeds and on early soybean seedling development. The experiment was composed by seeds of 10 soybean cultivars classifed by metallic screens with three sizes of oval holes (S12, S13 and S14) and subjected to three water potentials (0, -0.1, and -0.2 MPa), with four replications. Data on genotypes were grouped as replications and arranged on a factorial 3 × 3 (size × water potential), with 40 replications. Data assessed were: first and final count of germination; length and seedling dry weight; and correlation between length/mass of radicle and hypocotyl. It was concluded that under ideal moisture conditions larger seeds have better physiological quality, producing more vigorous seedlings; but, that under water potential of -0.2 MPa smaller seeds produce larger seedlings; and that the hypocotyl is more infuenced by water stress than the radicle.

De Sousa A.C.M.,University of Campinas | Matsura E.E.,University of Campinas | Dos Santos L.N.S.,CCA UFES | Montes C.R.,University of Sao Paulo | De M. Pires R.C.,CNR Institute of Biophysics
Engenharia Agricola | Year: 2013

Irrigation with domestic sewage effluent (DSE) has been recommended bysubsurface dripping, as it can obtain a high rate of irrigation efficiency and faster use of salts in comparison with other irrigation methods. The study aimed at evaluating the area, the length and the effective depth of theroot system of sugarcane irrigated with DSE by subsurface drip system and with different irrigation rates at depths of 0.00-0.20, 0.20-0.40, 0.40-0.60and 0.60-0.80m. The experiment was carried out in the municipality of Piracicaba, in the state of São Paulo (SP), Brazil, in a sugarcane area irrigated with DSE in a completely randomized blocks set up in furrows, with three replications and four treatments, which are: one area without irrigation (AWI) and three irrigated areas meeting 50% (T50%), 100% (T100%) and 200% (T200%) of the crop's water need between each round of irrigation. T100% and T200% provided smaller areas and lengths of roots in the two deepest layers,as compared to AWI and T50%, which stimulated the development of deeper roots due to the water stress. TWI, T100% and T200% presented 80% of the rootsup to a depth of 0.40m and T50% treatment presented 76.43% of roots total.

Tomaz M.A.,Federal University of Espirito Santo | Costa A.V.,CCA UFES | Rodrigues W.N.,CCA UFES | Pinheiro P.F.,CCA UFES | And 3 more authors.
Bioscience Journal | Year: 2014

Essential oils consist of a type of secondary metabolite that holds great economic importance, they have been increasingly studied and used as potent inhibitors of seeds and growth of various plants. The present work aimed at the qualitative and quantitative chemical analysis and evaluation of the allelopathic activity of the essential oil extracted from fresh leaves of eucalyptus (Eucalyptus citriodora) over the germination and root development of seeds of sorghum (Sorghum bicolor L.) and cucumber (Cucumis sativus L.), grown in a Petri dish. The essential oil was obtained by steam distillation, using a Clevenger apparatus, and analyzed by chromatography in gas phase with flame ionization detector and mass spectrometry. It was possible to identify twelve chemical constituents corresponding to 97.69%, with predominance of oxygenated monoterpenes citronellal (64.92%) and iso-isopulegol (10.20%) and citronellol (8.25%). The biological essays using the essential oil showed the presence of an allelopathic effect, affecting the germination and radicule length of sorghum and cucumber seeds, the germination reduction being more pronounced in sorghum, also the increase of the oil concentration leads to a linear decrease in the germination and in the radicule length. © 2014, Universidade Federal de Uberlandia. All rights reserved.

Filho T.L.,Federal University of Espirito Santo | Della Lucia S.M.,Programa de Pos Graduacao em Ciencia e Tecnologia de Alimentos | Saraiva S.H.,Programa de Pos Graduacao em Ciencia e Tecnologia de Alimentos | Sartori M.A.,CCA UFES
Semina:Ciencias Agrarias | Year: 2013

Espirito Santo State is the largest producer of conilon coffee in Brazil. However, there is a lack of information about physico-chemical composition and sensory characteristics of this coffee submitted to different processing forms. Therefore, the objective of this work was to investigate physico-chemical and sensory characteristics of the Espirito Santo conilon coffee submitted to three forms of processing. The harvest was performed selecting only cherry grains, which were submitted to three forms of processing (dry process, semi dry process or wet process). Sensory analysis was performed by two professional classifiers. Analysis of moisture, pH and titratable acidity were determined in samples of raw and roasted coffee and aqueous extract were determined in samples of roasted coffee. The processing forms and types of grains did not differ in terms of pH and acidity. Natural and peeled coffee showed higher levels of aqueous extract. In sensory classification, all samples showed good overall evaluation. The use of raw material within the quality standards, grains of cherry type and the proper conduction of post-harvest stages allow the obtainment of a beverage with good sensory ratings and without changes in pH and acidity regardless the processing form used. Therefore, it is possible to obtain good quality beverages using dry processing, which is less expensive than the other types of coffee processing.

Paes J.P.P.,Federal University of Espirito Santo | Rondelli V.M.,University of Pernambuco | Costa A.V.,CCA UFES | Vianna U.R.,CCA UFES | de Queiroz V.T.,CCA UFES
Revista Brasileira de Fruticultura | Year: 2015

The twospotted spider mite, Tetranychus urticae Koch (1836) (Acari: Tetranychidae), is the major pest in strawberry. The objective of this study was the chemical characterization of the essential oil of Chenopodium ambrosioides L. and the evaluation of their effects on twospotted spider mite. The compounds of the essential oil were identified by GC/FID and GC/MS analysis. The mortality and oviposition were evaluated after spraying the oil (2.5, 5.0, 7.5 and 10.0% v v-1) on twospotted spider mite females. The yield of the essential oil was of 0.3% and the compounds identified were (Z)-ascaridol (87%), (E)-ascaridol (5.04%), p-cymeno (4.83%), α-terpinene (1.24%) and piperitone (0.7%). The highest values for mortality and reduction of oviposition observed were 85% and 69%, respectively. C. ambrosioides essential oil is a promising option for the management of twospotted spider mite. © 2015, Sociedade Brasileira de Fruticultura. All rights reserved.

de Oliveira M.J.V.,CCA UFES | Schmildt E.R.,CEUNES UFES | do Amaral J.A.T.,CCA UFES | Coelho R.I.,CCA UFES | Schmildt O.,Bolsista PNPD CAPES
Revista Brasileira de Fruticultura | Year: 2014

This study investigated the use of gibberellin (GA3) in medium in vitro propagation of papaya ‘Tainung 01’ and checking the elongation of shoots and their behavior in the ex vitro rooting.. Shoots less than one cm were subjected to elongation on MS medium containing GA3 treatments as in mg L-1: T1 = 0.0 T2 = 0.5 with sterilized culture medium, T3 = 0.5 sterilized cold, T4 = 2.0 with sterilized culture medium, T5 = 2.0 sterile cold. After these treatments, the shoots were subjected to ex vitro rooting. It was observed that GA3 at levels of 0.5 and 2.0 mg L-1 used in autoclaving after the multiplication has not proved effective for lengthening the shoots, but when sterilized by filtration proved to be effective in lengthening the shoots, however, is harmful in the subsequent stage of rooting and can latter, require subculture to fresh medium supplemented with auxin to induce rooting. © 2014, Sociedade Brasileira de Fruticultura. All rights reserved.

Zucoloto M.,Campus Universitario | Lima J.S.S.,CCA UFES | Coelho R.I.,CCA UFES
Revista Brasileira de Fruticultura | Year: 2011

The aim was to study the spatial variability of the soil chemical properties and the production of banana 'Prata-Anã', by classical statistics and geostatistics, and the correlation between them. Samples were collected at four points around the plants making a composite sample, at a depth of 0-0.2 m in a regular grid, total of 100 sampling points, spaced 6 x 4 m. The production of banana showed a negative correlation of 0.20 with H+Al. All soil chemical properties and the production of banana showed spatial dependence.

Ferreira J.P.,UFES | Schmildt E.R.,CEUNES UFES | do Amaral J.A.T.,CCA UFES | Schmildt O.,UFES | Nascimento A.L.,UFES
Revista Ciencia Agronomica | Year: 2011

The purpose of this study was to assess the variability among clones F2 geration of papaya 'Tainung 01' on the in vitro rooting. The clones were obtained by the multiplication of explants from the F2 geration plants obtained in a greenhouse, keeping the identification during three subcultures. The percentage of rooting and shoot growth were evaluated from branches of 10 clones of papaya Tainung 01' in rooting medium containing salts and vitamins of MS medium, plus 0.2 mg L-1 IBA. The experimental design was completely randomized, with three replications and 10 branches per repetition in individual test tubes of 25 mm x 150 mm. From the results it appears that it is possible to select clones more responsive to in vitro rooting 'Tainung 01' from the segregating F2 generation. The selection of clones more responsive to establishment of trade protocols depends on the field evaluation, due to segregation for yield traits obtained in the F2 generation.

Uliana E.M.,CCA UFES | dos Reis E.F.,CCA UFES | da Silva J.G.F.,INCAPER | Xavier A.C.,CCA UFES
IRRIGA | Year: 2013

The knowledge of monthly and annual probable precipitation is important for the planning of agricultural activities, construction, tourism, transport and other related activities. The objective was to obtain the monthly and annual probable precipitation for the State of Espírito Santo, Brazil, considering the 75% level of probability, and study its spatial distribution. To estimate the precipitation for this level of probability it was used the incomplete gamma distribution, and to check the adherence of this distribution to data series it was used the Kolmogorov-Smirnov test at 10% significance level. It was realized the geostatistical analyses and interpolation of the values of monthly and annual precipitation by ordinary kriging. The highest precipitation volumes in the State occur between October and April, and the lowest ones, between May and September. The cities of north and northwest regions have the lowest annual probable precipitation of the State.

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