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Search Results: 1 - 10 of 272219 matches for " Napole?o Esberard de Macêdo;Morais "
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Indicadores agroecon?micos na avalia??o do consórcio algod?o herbáceo + amendoim
Araújo, Afranio César de;Beltr?o, Napoleo Esberard de Macêdo;Morais, Martival dos Santos;Araújo, Jussiara de Lima Oliveira;Cunha, Jorge Luiz Xavier Lins;Paix?o, Stênio Lopes;
Ciência e Agrotecnologia , 2008, DOI: 10.1590/S1413-70542008000500017
Abstract: one aimed with this work to study the influence of cotton and peanut cultivars and relative planting times as intercropping, being verified the relationships of competitiveness among the two cultures. the experiment was carried out in miss?o velha, ceará state, brazil, at cotton experimental field of embrapa in the agricultural year of 2002. twenty treatments were tested with 4 repetitions, in a randomized block with 2 x 2 x 4 + 2 + 2 factorial, the factors being two cultivars of cotton (brs 186 - precocious 3 and brs 201), two cultivars of peanut (l7 and br-1), four planting times (0; 7; 14 and 21 days) plus the isolated controls of the two cultivars of cotton and peanut crops. considering the results obtained for rude income, surrender liquid and rates of return, one considered that there was not economical advantage for the producer when the cotton was planted in intercrop with the peanut, since the referring values to the intercrop were smaller than the isolated cultivations.
Fisiologia e produtividade do algodoeiro em solo encharcado na fase de plantula
Souza, José Gomes de;Beltr?o, Napoleo Esberard de Macêdo;Santos, José Wellington dos;
Pesquisa Agropecuária Brasileira , 2001, DOI: 10.1590/S0100-204X2001000300005
Abstract: annual cotton (gossypium hirsutum l. r. latifolium hutch.) is known as a sensitive plant to oxygen deficient soil. the purpose of this work was to investigate the physiology and yield of cotton cnpa 7h cultivar, grown under greenhouse conditions and exposed to oxygen shortage, by soil flooding, at seedling stage. two experiments were carried out and the experimental design was a randomized complete block with seven flooding periods and six replications. at the fourth day of flooding regime a decrease of 76.69% invertase activity, 77.37% of b-amilase, and 51.10% of nitrate reductase was observed. the photosynthesis activity was affected from the first day, being reduced to 58.63% in the fourteenth day of flooding; the carbohydrates were accumulated on leaves, stem and roots. cotton yield was reduced to 35.76% at the tenth day of flooding stress.
Fisiologia e produtividade do algodoeiro em solo encharcado na fase de plantula
Souza José Gomes de,Beltr?o Napoleo Esberard de Macêdo,Santos José Wellington dos
Pesquisa Agropecuária Brasileira , 2001,
Abstract: O algodoeiro herbáceo (Gossypium hirsutum L. r. latifolium Hutch.) é uma planta considerada sensível à deficiência de oxigênio do solo. O objetivo deste trabalho foi avaliar a fisiologia e produtividade do algodoeiro cultivar CNPA 7H, em casa de vegeta o, submetido à anoxia, por encharcamento do solo, na fase de plantula. Foram conduzidos dois experimentos em blocos ao acaso, com sete períodos de encharcamento e seis repeti es. No encharcamento de quatro dias ocorreu uma redu o na atividade da invertase de 76,69%, da beta-amilase de 77,37% e da redutase do nitrato de 51,10%. A fotossíntese foi afetada a partir do primeiro dia e alcan ou decréscimo de 58,63% no décimo quarto dia de encharcamento; os carboidratos foram acumulando-se nas folhas, caule e raízes. O rendimento de algod o em caro o foi reduzido em 35,76% no décimo dia do estresse anoxítico.
Micronutrientes in the sugarcane irrigated: correction of the soil with siderurgical slag
Lúcio Bastos Madeiros,Andreia de Oliveira Vieira,Boanerges Freire de Aquino,Napoleo Esberard de Macêdo Beltr?o
Engenharia Ambiental : Pesquisa e Tecnologia , 2009,
Abstract: The beneficial effects of manuring with siderurgical slag has been researched in several species, mainly among grassy such as sugarcane (Saccharum officinarum L.). The experiment was installed in the field, using one of the most representative sugarcane soils of Alagoas State, was cultivated in Dystrophic AGREY ARGISSOIL. The siderurgical slag source was containing 11% of soluble SiO2. The objective this research was quantify foliate micronutrients in the sugarcane and pH of soil due siderurgical slag application submitted the different irrigation water in S o Sebasti o city. For such the design was band of randomizered blocks, with five doses of siderurgical slags (band) and five water (sub band) and four repetitions. The analyzed variables were the micronutrients concentrations (Zn, Cu, Fe and Mn) in the leaf. The slag application increased the concentrations significantly foliate of Zn while concentrations of Cu and Fe decreased. The foliate concentration of Mn, in the interaction of slag and irrigation water, it decreased in the cane plants and first it would beat, when the factor was slag inside of irrigation water however, when the factor was sheets inside of slag, there was increase of the concentration this element us of the cycles. The foliate concentration of Mn, due the interactive effect of slag and irrigation water, decreased in the first cut. However, when the factor was irrigation water inside of slag, there was increase of concentration of this in the two cycles.
Influence of siderurgical slag on productivity and crop growth of irrigated sugarcane
Lúcio Bastos Madeiros,Andréia de Oliveira Vieira,José Dantas Neto,Napoleo Esberard de Macêdo Beltr?o
Engenharia Ambiental : Pesquisa e Tecnologia , 2008,
Abstract: The main goal of this research was to evaluate the influence of siderurgical slag and irrigation depth on the growth and productivity of sugarcane. The experiment was installed at county of Sao Sebastiao, state of Alagoas, Brazil, on the soil Dystrophic Agrey Argissoil cropped to sugarcane (Saccharum officinarum). The experimental design was bend in randomized blocks in 5x2 factorial scheme with five siderurgical slag doses: 0, 2.5, 5.0, 10.0 and 15.0 t ha-1, five irrigation depth 14.1; 9.5; 5.2; 2.3 e 0.0 mm h-1 and four replications. It was evaluated length, diameter mean, stem number and sugarcane weight. The application 15.92 e 9.84 mm irrigation water for hectare results increasing of length, diameter and stem number. Applications of 2.12; 3.17 e 2.78 t ha-1 of siderurgical slag result increasing of length, diameter mean and stem numbers of sugarcane raising values of 154.29 cm, 22.97 cm e 266 stem, respectively. The sugarcane yield raised 89 t ha-1 with 1,233 mm ha-1 of water apllied, so, the application of this waste on the soil increased the growth and productivity of the irrigated sugarcane.
Effect of calcium and magnesium silicate on the growth of the castor oil plant subjected to salinity levels Efeito de silicato de cálcio e magnésio sobre o crescimento de plantas de mamoneira submetidas a níveis de salinidade
José Félix Brito Neto,Napoleo de Esberard Macêdo Beltr?o,Jo?o Paulo Gonsiorkiewicz Rigon,Silvia Capuani
Semina : Ciências Agrárias , 2012,
Abstract: Salt stress decreases the osmotic potential of soil solution causing water stress, causing toxic effects in the plants resulting in injuries on the metabolism and nutritional disorders, thus compromising the plant growth, resulting in lower production. The calcium silicate and magnesium can perform the same function as limestone, besides providing silicon to plants, may also contribute to the resistance of plants to salt stress. Thus, the objective of this study was to evaluate the effect of calcium and magnesium silicate on the growth of the castor oil plant BRS Energia cultivated under saline conditions. This study evaluated plant height, stem diameter, number of leaves, leaf area, dry weight of shoot and root, and soil chemical characteristics. There was no interaction between factors of salinity level and of silicate level regarding the evaluated variables. There was a direct relationship between salinity levels and plant growth in height and stem diameter. The K concentration in soil were affected by salinity levels. O estresse salino diminui o potencial osmótico da solu o do solo causando estresse hídrico, provocando efeitos tóxicos nas plantas que resultam em injúrias no metabolismo e desordens nutricionais, comprometendo assim o crescimento das plantas, resultando em menor produ o. O silicato de cálcio e magnésio pode desempenhar a mesma fun o do calcário, além de fornecer silício para as plantas, podendo ainda, contribuir para a resistência de plantas ao estresse salino. Nesse sentido, objetivou-se com esse trabalho avaliar o efeito do silicato de cálcio e magnésio no crescimento da mamoneira BRS Energia cultivada sob condi es salinas. Avaliou-se a altura da planta, diametro do caule, número de folhas, área foliar, massa seca da parte aérea e da raiz e as características químicas do solo. N o houve intera o entre os fatores níveis de salinidade e silicato sobre as variáveis analisadas. Houve rela o direta entre os níveis de salinidade e o crescimento da planta em altura e diametro do caule. Os teores de K no solo foram influenciados pelos níveis de salinidade.
Volume de recipientes e composi??o de substratos para produ??o de mudas de mamoneira
Lima, Rosiane de Lourdes Silva de;Severino, Liv Soares;Silva, Maria Isabel de Lima;Vale, Leandro Silva do;Beltr?o, Napoleo Esberard de Macêdo;
Ciência e Agrotecnologia , 2006, DOI: 10.1590/S1413-70542006000300014
Abstract: castor (ricinus communis l.) is an oilseed crop well adapted for growing at semi-arid region for its rusticity and resistance to water deficit. it is usually planted by seeds, but planting by seedling can become attractive as a strategy for better use of the short rainy season. before the adoption of this technology some aspects have to be set in order to succeed, such as recipient volume, substrate composition and period of seedling at nursery. a trial was run in greenhouse at embrapa algod?o, campina grande, paraíba state, brazil, in a randomized block design with four replications and 25 treatments in 52 factorial distribution of five recipient volumes and five substrate compositions. between 15 and 43 days after emergence, five destructive measurements were weekly performed for obtaining data on plant height, stem diameter, leaf area, number of leaves and dry weight of shoot and roots. significant effects of treatments were detected on all variables analyzed. seedlings growth stabilized about 36 days after emergence regardless recipient volume. substrates composed by soil mixed to peanut hulls or bovine manure propitiated the best seedlings growth, while those ones containing sugarcane bagasse or agave mucilage were the worst. recipients with 2 l of volume were the most appropriated to castor seedlings production.
Períodos de interferência das plantas daninhas em algodoeiro de fibra colorida 'BRS Safira'
Cardoso, Gleibson Dionízio;Alves, Pedro Luís da Costa Aguiar;Beltr?o, Napoleo Esberard de Macêdo;Vale, Leandro Silva do;
Revista Ciência Agron?mica , 2010, DOI: 10.1590/S1806-66902010000300019
Abstract: this study aimed to determine the late-season presence of weeds in reddish brown cotton (cultivar brs safira) and the critical times for removing weeds. the experiment was carried out in the area of embrapa in miss?o velha-ce, brazil, located at 7o42'07" s latitude and 39o24'18" wgr. longitude, during the 2007/2008 season. the treatments consisted of two control groups: weed-free crop during the initial period after crop emergency, and crop kept with weeds during initial period after plant emergency. both consisted, 0; 20; 40; 60; 80 e 120 days after crop emergency (dae), the weed community was evaluated by two phytosociological indices (relative dominance and relative importance). regression analysis was performed as the model of sigmoidal boltzman, using data from productivity separately within each type of competition, to identify the critical periods of competition, considering 2; 5 and 10% reduction in yield. the community of weeds was composed by 21 species, standing out among them: richardia grandiflora, amaranthus deflexus, eleusine indica, merremia aegyptia, eragrotis pilosa, cenchrus echinatus and waltheria indica. considering 2; 5 and 10% reduction in yield fiber as acceptable, the critical period before weed interference were, respectively, 8; 14 and 20 dae. the critical period of weed interference, for those same levels of losses, were respectively, 100; 82 and 60 days.
Crescimento da mamoneira sob diferentes tipos de águas residuárias e níveis de água no solo
Josilda de Fran?a Xavier,Carlos Alberto Vieira de Azevedo,Napoleo Esberard de Macêdo Beltr?o,Antonio Ricardo Santos de Andrade
Ambiente e água : An Interdisciplinary Journal of Applied Science , 2009,
Abstract: This work evaluated the effect of different levels of water into the soil and types of treated wastewaters from industries of Campina Grande city, Paraíba state, on the growth of castor bean plant, variety BRS Nordestina. The experiment was conducted in greenhouse of the National Center of Research of Cotton. The experimental design was in entirely randomized blocks with 15 treatments in scheme of additional factorial analysis [(4 x 3) + 3] with three replications, having the following factors: three types of treated wastewaters and water of provisioning (A1 = IPELSA - Industry of Cellulose and Paper of Paraíba S/A; A2 = COTEMINAS - Industry of improvement of cotton fiber S/A; A3 = ILCASA - Industry of dairy products of Grande S/A (LEBOM); A4 = Water of the network of public provisioning of Campina Grande city, three levels of available soil water (AW) (N1 = 100%, N2 = 80% and N3 = 70%) and three controls, one for each AW with water of provisioning and with inorganic fertilizer in the foundation (A4C). In order to evaluate the growth of the castor bean plant during a period of 135 days, biweekly measures of the plant height, diameter of the stem and total foliar area variables were accomplished. For all growth variables there were significant interactions among the studied factors, denoting the interdependence among them, what was reflected on the growth of the plants. The castor bean plant, variety BRS Nordestina, responded well to irrigation with treated wastewater, especially from COTEMINAS industry mainly when associated to the level of 100% of the available soil water.
Casca de mamona associada a quatro fontes de matéria organica para a produ??o de mudas de pinh?o-manso
Lima, Rosiane de Lourdes Silva de;Severino, Liv Soares;Ferreira, Gilvan Barbosa;Sofiatti, Valdinei;Sampaio, Lígia Rodrigues;Beltr?o, Napoleo Esberard de Macêdo;
Revista Ceres , 2011, DOI: 10.1590/S0034-737X2011000200015
Abstract: substrates composed by blends of soil and organic materials has been usually recommended for production of jatropha curcas seedlings, and castor hull is an alternative to compose such substrate. this by-product produced in large amount in the peeling process has high content of macronutrients. in order to evaluate blends of four organic materials with soil and castor hull, a trial was run in a greenhouse at embrapa algod?o between october and december 2006 in a completely randomized design with four replications and two plants per plot. treatments were blends of soil and castor hull with one of the following materials: garbage compost, bovine manure, sewage sludge, and castor meal. control was a blend of soil and castor hull. at 55 days after planting, data on plant height, number of leaves, leaf area, stem diameter, dry weight of shoot and root, and leaf content of n, p, k, ca, mg and s were measured. all substrates were appropriate for growing jatropha seedlings, although the blend of the soil and castor hulls without an additional organic source resulted in the lowest plant growth. the best seedlings growth and plant nutrition were observed when the blend contained garbage compost, sewage sludge or castor meal. the leaf content of macro nutrients had limted influence from the content of the same nutrient measured in the organic material used for the substrate composition.
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