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Search Results: 1 - 10 of 31465 matches for " Paulo Ademar Martins;Pellegrino "
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Estudo de simula??es de microclimas em casas de vegeta??o visando à aclimata??o de mudas micropropagadas de bananeira cv Grande Naine
Scaranari, Ciro;Leal, Paulo Ademar Martins;Pellegrino, Giampaolo Queiroz;
Revista Brasileira de Fruticultura , 2008, DOI: 10.1590/S0100-29452008000400027
Abstract: in acclimatization processes, the environment control takes over a part of vital importance, since in in vitro condition banana seedlings do not efficiently operate the absorption of light, water and nutrients. therefore, they should be submitted to controlled environments under feasible conditions of luminosity, temperature (around 28oc, with minimum of 18oc and maximum of 34oc), and relative humidity above 75%. for this purpose, it was installed five mini tunnels with controlled temperature and relative humidity. for the control of temperature it was used pad-fan evaporative coolers at 28/25oc. for the control of relative humidity it was used fogging during the day at 75% under intermittence of 6s at each 40s. for temperature and relative humidity monitoring, it was installed three aspirate psychrometers in each mini tunnel connected to a data logger for daily acquisition every 60s. temperature and relative air humidity were adequate for plants development, however significant differences were observed between the different environment conditions. for luminosity study, under transparent plastic film (low density polyethylene) of 100μm thickness, it was used four meshes with average shading in the par spectrum band (400 to 700nm) of 69.92%, 50.73%, 29.73%, and 57.77%, being the first three in red color (with top level at 580nm, and abrupt reduction after that), the fourth mesh was black (linear behavior). the fifth tunnel had only transparent plastic film, showing 12.74% of solar radiation interception. these values were obtained from paired samples (mesh and plastic film) for the first four tunnels, and only the transparent plastic film for the last, using a spectral radiometer (400 to 1100nm), with spectral resolution of 2nm. inside and outside of each environment it was obtained global and par irradiance by using calibrated photovoltaic sensors at 9:00, 12:00, and 3:00, under clean and cloudy sky, during the summer of 2004/05, and winter of 2005. the red mesh pr
Avalia??o da biomassa foliar de morangueiro hidrop?nico em diferentes ambientes protegidos
Costa, Edilson;Leal, Paulo Ademar Martins;
Ciência e Agrotecnologia , 2008, DOI: 10.1590/S1413-70542008000600038
Abstract: analyses were made in the experimental field of the agricultural engineering college at state university of campinas (unicamp). four varieties of strawberry [fragaria x ananassa (weston) duchesne ex rozier] were tested in four hydroponics production systems (100mm and 150mm channels and 150mm channel with a vase containing coconut fiber and a vertical pipe containing carbonized rice rusk). three greenhouses were tested: i) a greenhouse without air evaporative cooling nor co2 aerial injection, ii) a greenhouse with co2 aerial injection and without air evaporative cooling and iii) a greenhouse with co2 aerial injection and air evaporative cooling. it was analyzed the leaf fresh (mff) and dry mass in gram (msf) and the leaf area in mm2 (af). the best hydroponics system was 150mm channel with a vase containing coconut fiber. the best environment condition was the one with air evaporative cooling and aerial injection of co2.
Shading and periods of acclimatization of micropropagated banana plantlets cv. Grande Naine
Scaranari, Ciro;Leal, Paulo Ademar Martins;Mazzafera, Paulo;
Scientia Agricola , 2009, DOI: 10.1590/S0103-90162009000300008
Abstract: banana plantlets obtained by micropropagation need to be submitted to a period of acclimatization since they do not use light, water, and nutrients in an efficient way. the acclimatization must be carried out under greenhouse conditions where temperature, light, and air humidity are adequate for a gradual hardening of the plantlets. in this study, the development of banana plantlets was evaluated during acclimatization under a full light condition including covered surfaces with red shade cloth (70%, 50%, and 30% shade) and black shade cloth (50% shade), both under a transparent plastic film of 100 μm. temperature, relative air humidity, irrigation, and nutrition conditions were also controlled. physical and physiological parameters were recorded at various stages in the greenhouses after three, six, and nine weeks and also after seven weeks of transplanting to field conditions. treatments were hierarchically graded according to their statistic classification. combined results indicated superior outcomes of plantlets maintained under black 50% shade cloth for nine weeks, both in the summer and winter seasons. similar results, but in a shorter time, were obtained with plantlets cultivated under red 70% shade cloth, for six weeks in the summer.
Climatiza??o e armazenamento refrigerado na qualidade pós-colheita de bananas 'nanic?o'
Fernandes, Enrique Georgette;Leal, Paulo Ademar Martins;Sanches, Juliana;
Bragantia , 2010, DOI: 10.1590/S0006-87052010000300027
Abstract: this work aimed to evaluate, through physical and chemical parameters, the postharvest quality of banana 'nanic?o' totally green and acclimatized after 17 days of storage, and totally green and submitted to two storage conditions (room temperature and cooling). fruits were harvested at totally green color stage and the experiment was conducted in a completely randomized design with four treatments: (stored at 13 °c; stored at 25 °c; stored for 17 days at 13 °c, ripened and stored at 13 °c; stored for 17 days at 13 °c, ripened and stored at 25 °c). the performed evaluations were: loss of fresh mass, titratable acidity, ph, soluble solids and total and reducing sugars. totally green non-acclimatized bananas 'nanic?o' stored for 38 days at 13 °c and 28 days at 25 °c did not complete the ripening process. also they exhibited a small increase of soluble solids, total and reducing sugars, and a high percentage of loss of fresh mass. the totally green fruit stored for 17 days at 13 °c and subsequently brought into the process of acclimatization ripened completely. however, these fruits exhibited lower sugar content and high mass loss, regardless the storage temperature. the period of 17 days is not recommended for storage of bananas 'nanic?o' totally green for further acclimatization. the cooling temperature (13 °c) was effective in delaying fruit ripening.
Crescimento de mudas de mamoeiro conduzidas em diferentes ambientes protegidos, recipientes e substratos na regi?o de Aquidauana, Estado do Mato Grosso do Sul
Costa, Edilson;Leal, Paulo Ademar Martins;Santos, Léia Carla Rodrigues dos;Vieira, Laura Caroline Rodrigues;
Acta Scientiarum. Agronomy , 2010, DOI: 10.4025/actasciagron.v32i3.4449
Abstract: an experiment with growth and formation of papaya seedlings was carried out in the state university of mato grosso do sul, unit of aquidauana, mato grosso do sul state, brazil, from september to november 2006. four protected environments, two kinds of pots and three substrate compositions were evaluated. the height of plants (cm) and leaf number were evaluated. the environments covered with screen (black and aluminized monofilament) showed best results to height and leaf number during experimental development. polyethylene bags were the best containers to grow papaya seedlings. the substrate with vermiculite showed the best results in both containers and all environments. in the end phase of seedling formation, the aluminized screen led to bigger plants in better substrates. polystyrene trays with 72 cells were not viable for growing papaya seedlings. the substrate with higher percentage of sawdust showed the worst results.
Resfriamento rápido de piment?o amarelo com ar for?ado
Antoniali, Silvia;Leal, Paulo Ademar Martins;Magalh?es, Ana Maria de;Sanches, Juliana;
Ciência Rural , 2012, DOI: 10.1590/S0103-84782012005000030
Abstract: in the present research it was determined the cooling time of yellow bell pepper 'zarco hs' submitted to forced air cooling, using different types of packaging, as well its postharvest conservation under refrigeration at 5,1±0,2°c and 98,6±0,3% rh during a period of 30 days under. the temperature was measured by thermocouples in the chamber, the evaporator, fruit and packs for a total of 48 thermocouples. the analysis of mass loss, humidity content, and firmness index were realized. it was possible to conclude that the forced air cooling process it's a feasible technology for postharvest conservation of yellow bell pepper 'zarco hs' reducing the temperature of 7/8 cooling time to the maximum of 56 minutes.
Ambientes de cultivo, recipientes e substratos na produ??o de biomassa foliar e radicular em mudas de maracujazeiro amarelo em Aquidauana - MS
Costa, Edilson;Leal, Paulo Ademar Martins;Santos, Léia Carla Rodrigues dos;Vieira, Laura Caroline Rodrigues;
Ciência e Agrotecnologia , 2010, DOI: 10.1590/S1413-70542010000200027
Abstract: the objective of the work was to evaluate the effects of environment, recipients, and substrate compositions in passion fruit (passiflora edulis sims f. flavicarpa deg.) seedlings biomass production in pantanal region from september to november of 2006. experimental trials were conducted in four protected environments, in two types of containers and three different substrate compositions. the environments were: a1 (greenhouse covered with low-density, 150-microns-thick polyethylene film), a2 (monofilament black screened with mesh for 50% of shade), a3 (aluminized screened with mesh for 50% of shade) and a4 (environment covered with straw of native coconut palm); the recipients were: polyethylene bags (r1) (15 x 25 cm) and polystyrene trays (r2) (with 72 cells). there substrates were: s1 (soil + organic compost + vermiculite, 1:1: 1 v/v), s2 (soil + organic compost + sawdust, 1:1: 1 v/v) and s3 (soil + organic compost + vermiculite + sawdust, 1:1: 1/2: 1/2 v/v). the experimental design was completely randomized statistical analysis in split-split-plot, with fifteen replications. the treatments in the plot were environments, in the subplots were pots, and subsubplots were substrates (4 x 2 x 3 = 24 treatments). fresh and dry mass of aerial and root system parts were evaluated. environments with screen showed better results for seedlings of yellow passion fruit biomass in polyethylene bags. polyethylene bags promoted higher biomasses. the substrate with vermiculite showed better results for both types of containers. the substrate with a higher percentage of sawdust showed the worst result.
Desenvolvimento inicial de mudas de jatobazeiro do cerrado em Aquidauana-MS
Costa, Edilson;Leal, Paulo Ademar Martins;Rego, Norton Hayd;Benatti, Jarbas;
Revista Brasileira de Fruticultura , 2011, DOI: 10.1590/S0100-29452011005000035
Abstract: nowadays, the consumption of fruits and vegetables increased, mainly fruit trees from cerrado. this work aimed to study the growth of "jatobazeiro do cerrado" seedlings under protected cultivation using different substrates, in the uems, from november 2008 to march 2009. three protected cultivation environments were used: greenhouse with transparent low density polyethylene plastic; nursery of black shading screen and nursery of reflector thermal screen; and six substrates: soil; plantmax?; fine coconut fiber; chips coconut fiber vermiculite and organic compound. the experiment was analyzed in a completely randomized design using a split-plot scheme with ten replications. there was interaction between environment and substrate on the growth of "jatobazeiro do cerrado" seedlings. at the greenhouse is indicated the use of the plantmax? and at nurseries screen is recommended the vermiculite. the plantimax? promoted uniform seedling growth in all environments, especially in greenhouse. the substrate with 100% organic compound is not indicated the formation "jatobazeiro do cerrado" seedling. the dickson quality index is a good standard pattern for seedling quality.
Principal components analysis for quality evaluation of cooled banana 'Nanic?o' in different packing
Sanches, Juliana;Leal, Paulo Ademar Martins;Saravali, José Henrique;Antoniali, Silvia;
Revista Brasileira de Fruticultura , 2003, DOI: 10.1590/S0100-29452003000200009
Abstract: this work aims determinate the evaluation of the quality of 'nanic?o' banana, submitted to two conditions of storage temperature and three different kinds of package, using the technique of the analysis of principal components (acp), as a basis for an analysis of variance. the fruits used were 'nanic?o' bananas, at ripening degree 3, that is, more green than yellow. the packages tested were: "torito" wood boxes, load capacity: 18 kg; "? box" wood boxes, load capacity: 13 kg; and cardboard boxes, load capacity: 18 kg. the temperatures assessed were: room temperature (control); and (13±1oc), with humidity controlled to 90±2,5%. fruits were discarded when a sensory analysis determined they had become unfit for consumption. peel coloration, percentages of imperfection, fresh mass, total acidity, ph, total soluble solids and percentages of sucrose were assessed. a completely randomized design with a 2-factorial treatment structure (packing x temperature) was used. the obtained data were analyzed through a multivariate analysis known as principal components analysis, using s-plus 4.2. the conclusion was that the best packages to preserve the fruit were the ? box ones, which proves that it is necessary to reduce the number of fruits per package to allow better ventilation and decreases mechanical injuries and ensure quality for more time.
Manual transportation within the plot and physical damages to bananas
Magalh?es, Mário Jorge Maia de;Abrah?o, Roberto Funes;Leal, Paulo Ademar Martins;
Scientia Agricola , 2004, DOI: 10.1590/S0103-90162004000100006
Abstract: the manual transportation of banana bunches within plots provokes physical damages to fruits compromising their quality. to assess the influence of the distance banana bunches travel on the shoulders of harvesters within the plot, on the incidence of physical damages present on the peel of fruits of the nanic?o cultivar, two experiments were carried out in the vale do ribeira region (sp), in sites with slope < 1%. each experiment divided the plot in different distance bands, two of which were included in this study: one located far away from the collection roads (30-50 m and 80-100 m distance bands) and another in an intermediate position (70-80 m and 130-150 m distance bands). for each distance band, six banana bunches of 36 mm gauged fruits were randomly sampled. four banana hands were cut from the middle region of each bunch and ten fruits were assessed per hand, totaling 240 fruits per treatment. bunches were harvested at the same maturity degree and those served as control were not transported. a total of 1440 fruits was assessed in the two experiments. the physical damages on the fruit surface were graded on a scale with 6 divisions: 0-0.25 cm2; 0.25-0.5 cm2; 0.5-1.0 cm2; 1.0-1.5 cm2; 1.5-2.0 cm2; 2.0-2.5 cm2. the bunches transported on the shoulders of harvesters on distances over 70 m suffered increased (p < 0.01) damaged area. most damages presented areas up to 0.5 cm2.
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