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Porto Alegre, Brazil

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.

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.

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.

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.

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.,Instituto Agronomico Of Campinas Iac
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.

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