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Search Results: 1 - 10 of 61 matches for " Galbiatti "
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NITRATE AND SODIUM CONTAMINATION IN PERCOLATED WATER AND LEAF TISSUE IN LETTUCE CROP IRRIGATED WITH DOMESTIC SEWAGE WATER = CONTAMINA O POR NITRATO E SóDIO DA áGUA PERCOLADA E DA PLANTA DE ALFACE IRRIGADA COM áGUA RESIDUáRIA
Adriano Gerim Ribeiro,Jo?o Antonio Galbiatti
Holos Environment , 2004,
Abstract: With the objective of characterizing and simulating the contamination of the percolated water in the soil, were analyzed lettuce crops fertilized with organic and mineral compounds and irrigated along furrows with residual water contaminated by total and fecal coliforms that originated from the dilution of domestic sewers with treated water. The experiment was conducted using thirty 500L amianthus boxes with a surface area of 1 m2 per box filled with sifted soil with a bottom layer of broken stones, 10cm thick. Three lettuce crops were used. The incorporation of organic and mineral fertilizers occurred during the first and third crops. Four irrigation furrows were used, which resulted in five rows of planted lettuce. Collectors of percolated water were made using inch plastic tubes, sawed length-wise and covered with a sieve, and were installed at depths of 15 and 30 cm. A water collector was placed at 60cm depth of at the bottom of the boxes, and remained closed except for when collecting the two water samples taken during each crop cycle: 15 days after plantingthe lettuce seedlings and right before harvesting the lettuce. Chemical, physical and bacteriological analyses of the water collected at depth were carried out. The average concentration of nitrate and sodium in the three crops is indicative that feathers ofcontamination move slowly at depth in agricultural soils and in areas of organic and inorganic residue deposition. The microbial analyses of the water collected from the lower layer at a depth of 60 cm did not show contamination from fecal coliforms. = O trabalho foi desenvolvido no Centro de Estudos Ambientais/UNESP (CEA), em ambiente protegido, com o objetivo de se estudar os efeitos da fertiliza oorganica, da fertiliza o mineral e da irriga o por sulcos, com água tratada e servida, em cultura da alface (Lactuca sativa L.), observando-se a presen a de nitrato (NO3-) e sódio (Na+) no tecido foliar e bactérias coliformes totais (CT) e coliformes fecais (CF)na água percolada. As parcelas experimentais distribuídas em um delineamento experimental em blocos casualizados, constituíram-se de 30 caixas de amianto com volume de 500 L e área superficial de 1 m2 , preenchidas com solo previamente peneirado. Os tratamentos caracterizaram-se pela associa o entre fertilizantes e água contaminada e tratada. Três cultivos de alface foram realizados. Coletores de água foram instalados a 15, 30 e 60 cm de profundidade. Duas coletas de água foram realizadas em cada cultivo, 15 dias após o transplante e uma na colheita, para verificar a presen a de NO3-,
THE BAUXITE RESIDUE APPLIED IN SUGAR CANE = APLICA O DO RESíDUO DA MINERA O DE BAUXITA EM CANA-DE-A úCAR
Adriano Gerim Ribeiro,Jo?o Antonio Galbiatti
Holos Environment , 2009,
Abstract: The experiment was carried through in protecting environment with the objective to evaluate the effect of the bauxite residue in the macronutrients and dry mass concentrations in the sugar cane. Vases of 10 L had been used that they had received the following rates from bauxite residue: 0, 28, 56, 84, 112 e 140 t ha-1, the used culture was the sugar cane (SP92 4221). The incorporation of the bauxite residue in the soil provided increase in the soil macronutrients concentration’s, being that only for sulphur levels above of 83 t ha-1 had provided reductions of this nutrient. Already for the macronutrients concentration’s determined in the leaf, levels above of 70,5; 125; 101; 56 t ha -1 diminished the nitrogen, phosphorum, potassium and sulphur concentration’s, respectively. However, for calcium and magnesium the use of the residue provided the reduction of foliar concentration. The level of the bauxite residue in which had the biggest production of dry mass was of 64 t ha-1. = O experimento foi realizado em ambiente protegido com o objetivo de avaliar o efeito do resíduo da minera o de bauxita nos teores de macronutrientes e massa seca da cana-de-a úcar. Foram utilizados vasos de 10 L que receberam as seguintes doses de resíduo de bauxita: 0, 28, 56, 84, 112 e 140 t ha-1, utilizando-se o clone de cana-de-a úcar SP92 4221. A incorpora o do resíduo de bauxita no solo proporcionou aumento nos teores dos macronutrientes do solo, sendo que apenas para o enxofre doses acima de 83 t ha-1 proporcionaram redu es deste nutriente. Já para os teores de macronutrientes determinados na folha, doses acima de 70,5; 125; 101; 56 t ha-1 diminuíram os teores de nitrogênio, fósforo, potássio e enxofre, respectivamente. Para o cálcio e o magnésio, entretanto, a utiliza o do resíduo proporcionou a diminui o dos seus teores foliares. A dose do resíduo de bauxita na qual houve a maior produ o de massa seca foi de 64 t ha-1.
Níveis de irriga??o e de composto de lixo organico na forma??o de mudas cítricas em casa de vegeta??o
Fachini, Emerson;Galbiatti, Jo?o A.;Pavani, Luiz C.;
Engenharia Agrícola , 2004, DOI: 10.1590/S0100-69162004000300010
Abstract: the research studied the association between irrigation levels and types of substrate utilizing organic waste compost, in the production of orange trees. a randomized block experiment design with split plots, with four repetition, three levels of irrigation and five types of substrate was used. the substrates were: 100% pine bark, 80% pine bark + 20% organic waste compound, 60% pine bark + 40% organic waste compound, 20% pine bark + 80% organic waste compound, and 100% organic waste compound. the irrigation levels were 50%, 100% and 150% the evaporation of modified atmometer, and the irrigation was done by dropping system. the development valuation was done fortnightly, been measured diameter and height of the plant. the results showed that, orange trees need different levels of water in different stage of development and types of substrate, the substrate 3 (60% pine bark + 40% organic waste compound) detached from the others because it gave better condition to development of the plant roots and disposal of nutrients by decomposition of organic waste compost. the irrigation 3 (150% the evaporation of modified atmometer) propitiated better development to orange trees.
EFECT OF IRRIGATION AND USE OF ORGANIC URBAN RESIDUES ON GROWING EUCALYPTUS SEEDLINGS = EFEITO DA IRRIGA O E UTILIZA O DE LIXO ORG NICO NA FORMA O DE MUDAS DE EUCALIPTO
Jandislau José Lui,Jo?o Antonio Galbiatti,Euclides Braga Melheiros
Holos Environment , 2008,
Abstract: Even if not specifically for agricultural areas, the disposal of organic residues seldom occurs according to adequate specifications. In this context, the search for safer parameters for the use of these residues in order to allow the sustainability of ecosystems is increasingly important. The use of Urban Organic Solid Residue (UOSR) shortly after collection without the practice of composting techniques, submitted to desiccation, grinding and applied in soil, may be the solution to avoid contamination of the ground water caused by the concentrated and localized accumulation of this material either in the open or through the practice of composting techniques. Studies in Brazil and the world on the characteristics and possibilities of using Urban Solid Residue (USR), and more specifically UOSR, have not yet yielded information that would result in sufficient knowledge for making decisions, which are necessary to respond to immediate demands due to the increasing volume of residues produced. With the intention of contributing more information, the aim of this study was to examine the effects of irrigation associated with the use of UOSR on growing eucalyptus seedlings. This research was developed in the School of Agricultural and Veterinary Sciences - UNESP (Universidade Estadual de S o Paulo) Campus of Jaboticabal. The statistical delineation used was fully random in a factorial design. Eleven substrata were formulated using two types of soil, a purple latossol and a dark red latossol, with and without chemical fertilization, six soil mixtures containing UOSR, and UOSR alone. In direct seeding in soil blocks, Citriodora Hooker eucalyptus seeds were used, using two water quantification methods to be applied through irrigation, class "A" tank methods and through weighing the substrata in four levels (50%, 75%, 100% and 130% of evapotranspiration). The data collected were statistically analyzed and show that mixtures with 20% or more of UOSR presented harmful effects on plant development, being more evident in doses above 20%, and irrigation based on the weighting method was more efficient in the production of eucalyptus seedlings through direct seeding. = Mesmo quando n o se encontram em áreas agrícolas, o descarte de resíduos organicos, quase sempre n o ocorre dentro de especifica es adequadas. Dentro desta ótica fica clara a necessidade de se buscarem parametros mais seguros para o uso desses resíduos, permitindo a sustentabilidade dos ecossistemas, com mínimas altera es. O uso imediato à coleta, do Resíduo Sólido Organico Urbano (R.S.O.U.), sem a práti
Efeito de diferentes períodos de irriga??o no desenvolvimento, produ??o e qualidade de sementes na cultura do milho (Zea mays L.)
Galbiatti, Jo?o A.;Borges, Maurício J.;Bueno, Lara F.;Garcia, Anice;Vieira, Roberval D.;
Engenharia Agrícola , 2004, DOI: 10.1590/S0100-69162004000200008
Abstract: the experiment was conducted at the experimental area of the rural engineering department of the faculdade de ciências arárias e veterinárias, campus de jaboticabal, universidade estadual paulista (fcav/unesp), brazil. the aim of this work was to verify the effect of the water deficit on maize (zea mays l.) crop during vegetative growth, in its production and physiological seed quality. a completely randomized statistical design with four replications, in a 3 x 2 factorial array was used. the treatments consisted of three irrigation periods (during maize growth; after the emission of the 12th leaf, and 20 days after flowering time), using cross hybrids seedling br201 and dina-70. results indicated that the water deficit on the vegetative growth (irrigation only after the emission of the 12th leaf) was the most harmful to maize plants and their production; the water deficit didn't affect the physiological seed quality. the physiological and production parameters were better in the cross hybrid dina70 than in the hybrid br201.
Qualidade da água de nascentes com diferentes usos do solo na bacia hidrográfica do córrego rico, S?o Paulo, Brasil
Donadio, Nicole M. M.;Galbiatti, Jo?o A.;Paula, Rinaldo C. de;
Engenharia Agrícola , 2005, DOI: 10.1590/S0100-69162005000100013
Abstract: with the objective of verify the remainders influence of ciliary vegetation and of the human action on the water quality, four springs were studied, with two springs on presence of remaining natural vegetation and two springs with agricultural activities predominance. these springs are part of córrego rico watershed, being located in the municipal districts of taquaritinga and guariba, s?o paulo state, brazil, in two classes of soil: argisoil and latosoil, respectively. points of collection of water were defined on the spring and along the water flow (among 0 to 50 m of the spring), in two periods (rainy and dry). the following variables were analyzed: color, ph, temperature, turbidity, alkalinity, total hardness, magnesium hardness, calcium hardness, phosphorus, nitrogen and dbo. it was concluded that, in a general way, a separation for springs and also for periods was observed, confirming that the sampling periods as well as the characteristics and different uses of the soil influence the water quality of the watersheds. color, turbidity, alkalinity, and total nitrogen are the variables that presented the better relative importance in the canonic variables.
Desenvolvimento do feijoeiro sob o uso de biofertilizante e aduba??o mineral
Galbiatti, Jo?o A;Silva, Flávia G. da;Franco, Claudenir F;Caramelo, Anaira D;
Engenharia Agrícola , 2011, DOI: 10.1590/S0100-69162011000100017
Abstract: the intensive production requires appropriate management of soil to ensure the productivity and to avoid deterioration. one of the alternatives in improving the environmental quality in agriculture is the use of organic waste in the development of crops, reducing the dependence on mineral fertilizers. to evaluate the development of beans (phaseolus vulgaris) using mineral fertilizer and biofertilizer, the experiment was conducted with six treatments randomly distributed in four blocks, with plots of 8.0 x 5.0 meters. the experimentation treatments were characterized as: with and without biofertilizer (wb e wob, respectively), and for mineral fertilization it was used the recommended dose at planting, ? dosages and no mineral fertilization (mf, ? mf, and womf). it was adopted conventional cultural practices to prepare the initial soil, followed by irrigation with bovine biofertilizer in dosage of 100 m3 ha-1, three months ahead of sowing. it was evaluated the accumulated mass of the dry matter from different parts of the plant, leaf area and the culture productivity. the results showed similarities between the parameters examined, resulting in better development in the culture that received biofertilizer, either with the combination of half or equivalent amount of mineral fertilizer or only with the use of the effluent biodigester. the analysis of variance proved to be significant for the use of biofertilizer.
Variáveis biométricas da cana-de-a?úcar fertilizada com resíduos organico e industrial e irrigada com água servida e potável
Nobile, Fabio O. de;Galbiatti, Jo?o A;Muraishi, Reginaldo I;Araujo, José R;
Engenharia Agrícola , 2011, DOI: 10.1590/S0100-69162011000100019
Abstract: the agricultural use of organic and industrial residues is an alternative of exploitation with fertilization and source of organic matter to the soil. in this direction, the objective of this research was to evaluate the use of the urban solid waste and biofertilizer as nutrient source, and residue of the bauxite processing as agricultural liming materials of the soil for sugar cane (cane plant) and culture yields, irrigated with potable water and wastewater. for in such an experiment in vase was lead, under alfisol soil, cultivated with the variety rb855536. it had been evaluated biometric variable of the plant such as: plant height, diameter of stem, tillering, leaf number, dry matter of the root and dry matter of the aerial part. the data showed that the quality of the irrigation water, potable and wastewater, did not influence the evaluated parameters. the application of urban solid waste and biofertilizer had consisted in an efficient source of nutrients for sugar cane plants, but is necessary to apply additional fertilizer for the attainment of stem production similar to the treatment with conventional mineral fertilization. now the residue of the bauxite processing revealed efficient in the correction of the acidity presenting similar physical parameters to the treatment with mineral fertilization and lime, with exception of the dry matter of the root.
Quantifica??o de macronutrientes no solo e em folhas de cana-de-a?úcar em fun??o de doses de resíduo da minera??o de bauxita
Nobile, Fabio O. De;Galbiatti, Jo?o A.;Muraishi, Reginaldo;Ribeiro, Adriano G.;Freddi, On? da S.;
Engenharia Agrícola , 2010, DOI: 10.1590/S0100-69162010000100018
Abstract: the experiment was carried out in green house with the objective of evaluating the effect of the bauxite mining residue in the rates of macronutrients in sugarcane and soil. containers of 10 l were used. they received the following rates of bauxite residue: 0; 28; 56; 84; 112 and 140 t ha-1 . the used culture was the sugarcane (sp92 4221). the incorporation of the bauxite residue in the soil provided an increase in the levels of the soil macronutrients, and only for sulphur levels above 83 t ha-1, it was possible to provide reductions of this nutrient. for rates of determined macronutrients in the leaf, levels above 70, 5; 125; 101; 56 t ha -1 diminished the rates of nitrogen, phosphorum, potassium and sulphur, respectively. however, for calcium and magnesium the use of the residue provided the reduction of leaf rates. the level of the bauxite residue which had the largest production of dry mass was 64 t ha-1.
Degrada??o ambiental da bacia hidrográfica do rio Uberaba: uma abordagem metodológica
Candido, Humberto G.;Galbiatti, Jo?o A.;Pissarra, Teresa C. T.;Martins Filho, Marcílio V.;
Engenharia Agrícola , 2010, DOI: 10.1590/S0100-69162010000100019
Abstract: the present study is about the evaluation of the environmental degradation of the uberaba river watershed situated in a region called triangulo mineiro. it possesses an area of 241,904.30 ha, which encloses the cities of uberaba, veríssimo, concei??o das alagoas and a small portion of planura. in this study the map of ambient degradation was produced containing four levels: low, moderate, accented and severe. the parameters used in this classification were: vegetation, topography, soil/geology, natural potential for erosion, mechanization, agricultural area, population density, cattle-raising and area of conflict for which it was attributed values. for "the low" level of degradation it was defined values ≤ 13 points. for "the moderate" level, values situated in the interval of 14 to 16. values between 17 and 19 for "the accented" level, and "the severe" level with values ≥ 20 points. this study consolidates the consequences of the inadequate use of land when it is not respected its natural aptitude. the areas with moderate level of degradation represent 47%; however the areas of accented level (48%) and severe (4%) represent 52%, what discloses a strong indication in the advance of the destruction of natural resources. the areas classified with low level represent only 1%, sufficiently inexpressive, detaching the indifference in the preservation of natural resources.
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