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Search Results: 1 - 10 of 16882 matches for " Walter Veriano;Fernandes "
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Resíduos organicos como recondicionante de subsolo degradado e efeitos na atividade microbiana e fertilidade em cultivo de barbatim?o
Calgaro, Hemerson Fernandes;Cassiolato, Ana Maria Rodrigues;Valério Filho, Walter Veriano;Fernandes, Francisco Maximino;Maltoni, Kátia Luciene;
Revista árvore , 2008, DOI: 10.1590/S0100-67622008000600012
Abstract: following the construction of the hydroelectric power station of solteira island in the late 1960s, some areas were deforested and used as "lending areas". the soil was extracted from these areas, which acquired chemical and biological characteristics far from the ideal. this work aimed to evaluate the use of organic residues as a reconditioner of degraded subsoil and quantify its effects on soil microbial activity and fertility in 'barbatim?o' (stryphnodendron polyphyllum mart.) cultivation. the area is located at the unesp/ ilha solteira campus farm, in selvíria - ms. four sections (repetitions) of 250 m2 (10 x 25 m) were allocated, with 10 treatments for each, as follows: control; liming; fertilizing+n+p; liming+n+p; n+p+water hyacinth; n+p+sugar cane bagasse; n+p+water hyacinth+sugar cane bagasse; liming+n+p+water hyacinth; liming+n+p+sugar cane bagasse and liming+n+p+water hyacinth+sugar cane bagasse. the chemical characteristics of the subsoil were evaluated as well as plant growth, carbon microbial biomass (cmb) and released c-co2 , metabolic quotient (qco2) and microbial quotient (qmic), in 5 subsoil sample collecting times (june, august, november and december, 2005 and march, 2006). the subsoil displayed the same acid and poor nutrient level characteristics after a year. during the experiment, the cmb presented stabilization tendencies and the qco2 and qmic decreased in the same period. in all, even below the ideal level, the organic residues showed better results, with small positive differences for water hyacinth. cmb exhibited seasonal variations.
Aduba??o química e organica na recupera??o da fertilidade de subsolo degradado e na micorriza??o do Stryphnodendron polyphyllum
Calgaro, Hemerson Fernandes;Valério Filho, Walter Veriano;Aquino, Sueli da Silva;Maltoni, Kátia Luciene;Cassiolato, Ana Maria Rodrigues;
Revista Brasileira de Ciência do Solo , 2008, DOI: 10.1590/S0100-06832008000300041
Abstract: due to the building of the hydroelectric power plant of ilha solteira, in the late 60s, some areas have been deforested and were used as "loan areas". thus, the soils belonging to these locations were subtracted and these areas' physical, chemical and biological properties became inappropriate. this work aimed at evaluating the use of chemical and organic fertilization to improve the degraded subsoil and replanting with mycorrhizal stryphnodendron polyphyllum ("barbatim?o"). the area is located at the experimental station (fepe), unesp/ilha solteira campus, in selvíria - ms. using the design of randomized blocks with four replications of 250 m2 plots (10 x 25 m), 10 treatments were evaluated: control; liming; fertilizing n + p; liming + n + p; n + p + water hyacinth; n + p + sugar cane bagasse; n + p + water hyacinth + sugar cane bagasse; liming + n + p + water hyacinth; liming + n + p + sugar cane bagasse; and liming + n + p + water hyacinth + sugar cane bagasse. chemical characteristics of the subsoil and plant growth were evaluated five times (june, august, november and december 2005, and march of 2006) and the root percent colonization was evaluated in march 2006. after a year the subsoil still remained acidic and of low chemical fertility. the steam diameter and plant height showed increasing results along the period, with the highest values for the treatments that received liming, n + p and organic residues. the percent mycorrhizal colonization and number of spores were positively influenced by the presence of organic residues.
Effect of two methods on rotational grazing in contorl gastrointestinal parasites and performance in lambs from birth to weaning/ Efeito de dois métodos de pastejo rotacionado no controle dos parasitas gastrintestinais e no desenvolvimento ponderal de cordeiros do nascimento ao desmame
Hyldeth de Souza,Maria Concei??o Zocoller Seno,Luís Henrique Fernandes,Walter Veriano Valério Filho
Semina : Ciências Agrárias , 2005,
Abstract: The effects of two methods of rotational and grazing involving cattle and sheep on the control of gastrointestinal parasites and performance in lambs from birth to weaning were evaluated. Three areas with 1, 67 ha were sub-divided by electric fence into eight paddocks. Each paddock was grazed for 5 days and rested 35 days through June/01 to January/ 02. In treatment 1, 14 lambs and 20 ewes grazed in area 1 while 4 adults’ bovines grazed in area 2. After 40 days the animals inverted areas, that is, lambs and ewes grazed in area 2 and steers in area 1. At the same time in treatment 2, 14 lambs and 20 ewes were kept in area 3 under a simple rotational grazing system. Nematode egg counts (FEC) and larval culture weredetermined from fecal samples and live weight was obtained each 14 days. Packed cell volume (PCV) was determined every 28 days from blood samples. Data of FEC, PCV and live weight were statisticallyanalyzed using the Statistical Analysis System (SAS). The parasites found in lambs were, Haemonchus and protozoa Eimeria spp. The genera Strongyloides and Eimeria and PCV there were not differencestatistical between treatments (p<0,01). The alternated grazing method between sheep and cattle reduced the parasitic infection (p<0,01) of Haemonchus in ages 43-56 days and 57-70 days. The average lamb weights were: 31, 53 kg in T1 and 30 kg in T2 and there were no statistical difference between treatments (p<0,05) on lamb performance Estudou-se o efeito de dois métodos de pastejo, um rotacionado e alternado com bovino adulto e o outro rotacionado sem alternancia com bovino no controle dos parasitas gastrintestinais e no desenvolvimento ponderal de cordeiros, do nascimento ao desmame. Utilizou-se uma área experimental constituída por três módulos de 1,67 ha cada. Os módulos foram subdivididos em oito piquetes com cerca eletrificada. Cada piquete foi pastejado por cinco dias totalizando 40 dias em cada módulo, durante junho de 2001 a janeiro 2002. No tratamento 1 (T1) foram utilizados dois módulos, o primeiro iniciou com 14 cordeiros e 20 ovelhas e o segundo com 4 bovinos adultos. As trocas de módulos entre ovinos e bovinos foram a cada 40 dias. No tratamento 2 (T2) um terceiro módulo foi usado com 14 cordeiros e 20 ovelhas, também em sistema rotacionado, porém sem a alternancia com bovino. A cada 14 dias realizou-se a colheita de fezes para contagem de ovos por grama de fezes (OPG) e coprocultura e a pesagem dos cordeiros. A cada 28 dias colheu-se sangue para exames do volume globular (VG). Os dados de OPG, VG e do peso foram submetidos à análise estatística
Atributos químicos de um latossolo vermelho sob diferentes sistemas de preparo, aduba??es e plantas de cobertura
Moreti, Dolorice;Alves, Marlene Cristina;Valério Filho, Walter Veriano;Carvalho, Morel de Passos e;
Revista Brasileira de Ciência do Solo , 2007, DOI: 10.1590/S0100-06832007000100017
Abstract: soil management systems and fertilization types make differentiated amounts of mineral elements in the soil profile available. the objective of this study was to verify alterations in chemical attributes of a red latosol (typic haplustox) of brazilian savannah under organic and mineral fertilization, vegetation cover in no tillage and conventional tillage systems, and with bean and cotton crops. the experiment had a randomized complete block design with split-plots. two treatments of soil preparation (no tillage and conventional tillage) were installed in the plots. six treatments of fertilization were installed in the subplots: chicken manure fertilizer, chicken manure fertilizer + half of the recommended mineral fertilization, mineral fertilizations, crotalaria juncea, pennisetum americanum and control. soil samples were collected at depths of 0.00-0.10 m and 0.10-0.20 m for the evaluation of p, m.o., ph, k+, ca2+, mg2+, h + al, al3+ sb, ctce and v. the organic fertilizer only or associated with mineral fertilizer were the best treatments. the cover plants performed similarly regarding the recovery of chemical attributes. the distribution of mineral nutrients in the surface layer (0.00-0.20 m) was similar for no tillage and conventional tillage.
Severidade da mela da soja causada por Rhizoctonia solani AG-1 IA em fun??o de doses de potássio
Basseto, Marco Antonio;Ceresini, Paulo Cezar;Valério Filho, Walter Veriano;
Summa Phytopathologica , 2007, DOI: 10.1590/S0100-54052007000100008
Abstract: the fungus rhizoctonia solani, belonging to anastomosis group 1ia (ag-1 ia) is one of the most important pathogens affecting soybean in brazil. this fungus causes aerial or foliar blight of soybean, and cultural measures are thought as important choices for the control before the establishment of the disease. based on evidences that potassium amendments can substantially reduce the severity of several soybean diseases such as cercospora leaf blight (cercospora kikuchii), pod and stem blight (phomopsis phaseoli var. sojae) and stem canker (diaporthe phaseolorum f. sp. meridionalis). despite all evidence, there is no information in the literature about the effect of potassium controlling the soybean foliar blight. the hypothesis tested went that the foliar blight could be controlled by potassium amendments. in general, under controlled conditions, the increments of potassium in soil did not result in disease control. therefore, to corroborate this observation it is necessary to conduct follow-up field experiments and to evaluate the effects of the soybean foliar blight and its impact on yield.
Nitrogênio no feijoeiro em sistema de plantio direto sobre gramíneas = Nitrogen in common bean in no-tillage system over gramineae
Francisco Guilhien Gomes Junior,Marco Eustáquio de Sá,Walter Veriano Valério Filho
Acta Scientiarum : Agronomy , 2008,
Abstract: O adequado suprimento de N é primordial para se obter alta produtividade de sementes de feij o, entretanto, as respostas a esse nutriente, em sistema de plantio direto, podem variar em fun o da espécie e quantidade de palha. O objetivo do trabalho foi avaliara resposta do feijoeiro à aplica o de N, em sistema de plantio direto, sobre palhada de milho, milheto e braquiária. Foram realizados três experimentos, um para cada espécie de gramínea. O delineamento experimental foi o de blocos casualizados disposto em esquema fatorial 5x2x2, correspondente a cinco doses de N (0, 30, 60, 90, 120 kg ha-1) aplicadas em duas épocas da fase vegetativa (3a e 6a folha trifoliolada) e duas cultivares (IPR Juriti e Pérola), com quatro repeti es. A cultivar IPR Juriti produziu maior número de vagens por planta e apresentou menor massa de 100 sementes em rela o à cultivar Pérola. N o houve diferen a na produtividade do feijoeiro quando a aplica o do N em cobertura foi realizada no estádio de três ou seis folhas trifolioladas. Com base nos resultados obtidos, conclui-se que a produtividade de sementes de feij o aumenta linearmente com as doses de N em sistema de plantio direto sobre palhada de milho. An adequate supply of nitrogen is essential for high yield of common bean seeds; however, the responses to this nutrient in no-tillage systems can vary in function of the species and the amount of straw present. The aim of this research was to evaluate response of the common bean to N in no-tillage systems over maize, millet and Brachiaria brizantha crop residues. Three experiments were conducted, one for each gramineous species. The experimental design was a randomized block in a 5x2x2 factorial scheme, with five N doses (0, 30, 60, 90, 120 kg ha-1), in two distinct stadia during the vegetative development (3rd and 6th trifoliate leaf) and two common bean cultivars (IPR Juriti and Pérola), with four replications. The IPR Juriti produced a greater number of pods per plant and showed lower mass per 100 seeds than Pérola. It did not show variation in bean yield when the sidedressing N application was carried out in the 3rd or 6th trifoliate leaf stadia. Based on the obtained results, one concludes that the seed productivity of common beans increases linearly with N doses in a no-tillage system over maize residues.
O papel de Rhizoctonia spp. binucleadas na indu o de resistência a mela da soja = The role of binucleate Rhizoctonia spp. inducing resistance to the soybean foliar blight
Marco Antonio Basseto,Walter Veriano Valério Filho,Elaine Costa Souza,Paulo Cezar Ceresini
Acta Scientiarum : Agronomy , 2008,
Abstract: O papel de Rhizoctonia spp. binucleadas (RBN), no biocontrole de doen as causadas por R. solani Kühn em várias culturas, tem sido relatado na literatura. No entanto, n o há informa o, no Brasil, sobre o potencial de RBN como agentes de biocontrole contradoen as causadas por Rhizoctonia na soja. A hipótese testada foi de que isolados de RBN podem induzir resistência na soja contra a mela, causada por R. solani do grupo de anastomose (AG) 1 IA. Desta forma, o objetivo deste trabalho foi avaliar isolados de RBN, obtidos de amendoim, feij o e soja quanto à capacidade de induzir resistência na soja contra a mela, em condi es de casa de vegeta o. Esta pesquisa evidencia a a o de RBN na indu o de resistência em plantas de soja contra a mela. Entretanto, a manifesta o e a efetividade do fen meno de indu o de resistência s o dependentes da época de cultivo da soja. The role of non-pathogenic binucleate Rhizoctonia spp. (BNR) onthe biocontrol of diseases caused by R. solani on many crops has been reported in the literature. However, in Brazil, there is no information about the potential of BNR as biocontrol agents against Rhizoctonia diseases on soybean. On this research we tested thehypothesis that BNR can induce resistance on soybean against the foliar blight caused by R. solani anastomosis group (AG) 1 IA. Thus, the objective of this research was to evaluate BNR isolates isolated from peanuts, snapbeans and soybean according to their ability forinducing resistance on soybean against the foliar blight disease, under greenhouse conditions. This research evidenced the role of BNR inducing resistance on soybeans against the foliar blight. However, both the occurrence and effectiveness of the phenomenon of induced resistance are dependent on the soybean cultivation season.
Efeitos da desseca??o de plantas de soja no potencial fisiológico e sanitário das sementes
Lacerda, André Luiz de Souza;Lazarini, Edson;Sá, Marco Eustáquio de;Valério Filho, Walter Veriano;
Bragantia , 2005, DOI: 10.1590/S0006-87052005000300015
Abstract: the objective of this paper was to verify the ideal moment of application of desiccants on the soybeans crop, to obtain seeds with maximum physiological and sanitary quality. the cultivar iac-15 was sowed at the experimental area of fe/unesp - campus of ilha solteira, located in the district of selvíria, state of mato grosso do sul (20o 22's, 51o 22'w at approximately 335 m of altitude). the experimental design was a randomized block, with treatments in a factorial scheme of 3x3 and 4x4 (dessicant x application time), in 1996/97 and 1997/98, respectively. the desiccants applied during the season agricultural year 1996/97 were: paraquat, diquat, paraquat+diquat mix at the doses 400; 300; 200+150 e 400 g a.i.ha-1, respectively. in 1997/98 the same desiccants were used, at the same doses, with additional treatment application of ammonium glufosinate at the dose of 400 g a.i.ha-1. the desiccants were applied three times in 1996/97 and four times in 1997/98 with 5 days intervals starting at the r6 stage. according to the environmental conditions of this research the best desiccation time was when soybean plants had 80% to 90% of pods with yellow and brown coloration and seeds with 45% to 60% of water content. there were no effects of any of the desiccants tested in the physiological and sanitary potential required for commercialization of the seeds.
Armazenamento de sementes de soja dessecadas e avalia??o da qualidade fisiológica, bioquímica e sanitária
Lacerda, André Luiz de Souza;Lazarini, Edson;Sá, Marco Eustáquio de;Valério Filho, Walter Veriano;
Revista Brasileira de Sementes , 2003, DOI: 10.1590/S0101-31222003000400014
Abstract: the objective of the study was the evaluation of the physiologic, biochemical and sanitary characteristics of soybeans seeds after dessication with four dessicants, in different times, stored for six months and treated with fungicide. the experiment was carried out, in the seed laboratory, at unesp - ilha solteira. the soybean plants of the cultivar iac-15 were desiccated, in the agricultural year 1997/98, with: paraquat, diquat, paraquat + diquat (mixed in tank) and ammonium glufosinate at rates of 400, 300, 200+150 and 400 g.i.a. ha-1. starting in the r6 stage till r7, at five-day intervals. the seeds were harvested and placed in a dry chamber with relative humidity around 40% and temperature between 17 and 20oc for six months. the analyses were carried out with non treated seeds and seeds treated with thefungicide thiabendazole (20 g.i.a/100 kg of seeds). the conclusions were: the seeds did not present enough physiologic qualities for commercialization, and the dessicant ammonium glufosinate presented, significantly, smaller germination values. the protein content was not affected by the dessication, however, for the ethereal extract there was reduction in this component in thes dessicated seeds. the product paraquat applied in the first times resulted in larger incidence of fusarium spp. in the soybean seeds, while, for the phomopsis spp. smaller indifferent incidence of the times of applications.
Parametros reprodutivo e metabólico de vacas da ra?a Guzerá suplementadas no pré e pós-parto
Godoy, Marcelo Marcondes de;Alves, Jo?o Batista;Monteiro, Alda Lúcia Gomes;Valério Filho, Walter Veriano;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000100014
Abstract: thirty guzera cows (10 by treatment), supplemented in the prepartum (pre) and postpartum (pos) and without supplementation (ss) were used to evaluate, in the postpartum, the variation of body weight (bw), body condition score (bcs) (1 = very thin to 9 = very fat) and levels of serum total cholesterol (tc), rate pregnancy at 112 days postpartum and economic viability of pre and pos treatments, where the animals fed 1 kg/day/animal of concentration (16% cp; 3000 kcal de/kg). bw and the ecc were evaluated every 28 days, and blood collections were weekly performed for tc analysis until 112 days postpartum. days postpartum x treatment interaction was observed for bw and ecc. pre treatment increased the bw and ecc of the cows at parturition: 477.80 kg and 6.20, respectively, in relation to pos and ss treatments, of the 453.37 kg and 5.5, 447.57 kg and 5.28, respectively. treatment pre showed highr values of bw and ecc from 28 to 84 days, when compared to ss, while pos treatment shwed higher values from 84 to 112 days postpartum. pos treatment did not differ from pre in bw from 56 to 112 days postpartum and in ecc from 28 to 112 days postpartum. bw and ecc increased in the pos treatment and bw and ecc decreased in the pre and ss treatments until 112 dayspostpartum. bw and ecc in the pre, pos and ss treatments at 112 days postpartum were 457.79 kg and 5.38, 461.87 kg and 5.66, 436.57 kg and 4.78, respectively. tc showed days postpartum effect, but not of treatment, and increased as the postpartum days increased. rp was not influenced by pre, pos and ss treatments (50.00, 62.20, and 57.14%, respectively). the supplementation was not viable.
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