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Search Results: 1 - 10 of 181446 matches for " Leonardo Angelo de Aquino "
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Avalia o Agron mica de Cultivares de Soja Sob Irriga o no Semiárido Mineiro
Leonardo Angelo de Aquino,Tatiane Carla Silva,Rosiane Filomena Batista Almeida de Aquino,Carlos Henrique Batista
Revista Brasileira de Agricultura Irrigada , 2011, DOI: 10.7127/rbai.v5n300055
Abstract: O alcance de produtividade satisfatória da cultura da soja parte da escolha adequada das cultivares de acordo com as condi es edafoclimáticas da regi o de cultivo. Objetivou-se, nesse trabalho, avaliar aspectos agron micos de cultivares de soja sob condi es de irriga o no semiárido mineiro. O experimento foi conduzido no Instituto Federal do Norte de Minas Gerais, Campus de Januária. Os tratamentos consistiram de oito cultivares de soja: M-SOY 9350, M-SOY 8787 RR, M-SOY 8352 RR, CD 219 RR, P98Y51, P98Y70, P99R01, P99R91. Adotou-se o delineamento em blocos casualizados com quatro repeti es. Cada parcela foi composta por quatro linhas de 10 m. Como área útil adotou-se as duas linhas centrais, menos 50 cm das extremidades. A instala o da cultura e os tratos culturais foram os comumente preconizados para o cultivo da soja. O experimento foi irrigado por aspers o convencional. Avaliaram-se as seguintes características: altura de inser o de primeira vagem e de plantas, número de vagens por planta, ciclo, massa de 100 sementes e produtividade de gr os. A cultivar M-SOY 8352 RR n o apresentou altura de plantas adequada para a colheita mecanizada. Todas as cultivares avaliadas apresentaram altura de inser o de primeira vagem desfavorável à colheita mecanizada. A cultivar mais tardia foi a P99R01. As cultivares mais produtivas foram P98Y70 e P99R01.
Pests populational dynamics in industrial tomato plant in the North of Minas Gerais state, Brazil Dinamica populacional de pragas em tomateiro industrial no norte de Minas Gerais. DOI: 10.7902/ecb.v2i1.25
Rosiane Filomena Batista Almeida de Aquino,Renildo Ismael Félix da Costa,Leonardo Angelo de Aquino,Laís Pacheco Sá
Evolu??o e Conserva??o da Biodiversidade , 2011, DOI: 10.7902/ecb.v2i1.25
Abstract: The aim of this work was to sample and learn about the populational dynamics of insect pests present in the industrial tomato in northern Minas Gerais, in the municipality of Itacarambi. Ten random points were sampled and four plants in each section, weekly, based on the standard procedure suggested for the tomato plant IPM (Integrated Pest Management). Viruses transmitters (aphids, whiteflies, and thrips) and leaf miners (tomato pinworm and leafminer fly) were evaluated. Whiteflies occurrence throughout the collection period was observed. In the first fortnight of the culture cycle, there was a higher thrips population. There was a populational peak of leafhoppers (Empoasca sp) at the cycle beginning, and a populational peak of thrips in the second fortnight of the culture cycle. Other key pests for the tomato crop as aphids and mites were not observed in the samples. Informations of this study allow directing control tactics for the periods in which the insect pests populations are higher. Keywords: Solanum lycopersicum, integrated pest management, whitefly. Objetivou-se, com este trabalho, amostrar e reconhecer a dinamica populacional de insetos-praga presentes em tomate industrial na regi o Norte Mineira, no município de Itacarambi. Amostraram-se semanalmente dez pontos aleatórios e, em cada ponto quatro plantas, semanalmente; com base no procedimento padr o sugerido para o MIP tomateiro. Foram avaliados: transmissores de viroses: pulg es, mosca branca e tripes; minadores de folha: tra a-do-tomateiro e mosca minadora. Observou-se a ocorrência de mosca branca durante todo o período de coleta. Na primeira quinzena do ciclo da cultura houve maior popula o de tripes. Observou-se a presen a populacional de Cigarrinha (Empoasca sp) no início do ciclo da cultura; e aumento populacional de Tripes na segunda quinzena da cultura. Outras pragas-chave para a cultura do tomateiro como pulg es e tra as n o foram observados nas coletas. As informa es deste trabalho permitem direcionar as táticas de controle para os períodos em que as popula es dos insetos-praga s o mais elevadas. Palavras-chave: Solanum lycopersicum, manejo integrado de pragas, mosca branca.
Tanque Evaporimétrico Alternativo e Equa es para Estimativa da Evapotranspira o de Referência na Regi o Norte de MG
Thiago Mendes Lisboa,Carlos Henrique Batista,Leonardo Angelo de Aquino,Heider Rodrigo Ferreira de Silva
Revista Brasileira de Agricultura Irrigada , 2011, DOI: 10.7127/rbai.v5n100044
Abstract: A quantifica o da evapotranspira o na regi o semiárida é de grande importancia, visto que essa regi o apresenta grande ocorrência de períodos de déficit hídrico que limitam a produ o agrícola.Objetivou-se com este trabalho avaliar a correla o entre a evapotranspira o de referência (ET0),determinada pelo método de Penman-Monteith (ET0 – PM), com a estimada pelos métodos do Tanque Classe A (ET0 – TA), de Linacre (ET0 – L), de Hargreaves-Samani (ET0 – H&S), e a evapora o de um tanque alternativo denominado de Minitanque (EV – MT), na regi o Norte de Minas Gerais. Os dados foram coletados durante 12 meses de uma esta o automática e de um minitanque alocados na Unidade de Pesquisa do Instituto Federal do Norte Minas Gerais, Campus Januária, sob coordenadas geográficas de latitude 15o28’55’’ S e longitude 44o22’41’’ W, altitude 474 m. Foram ajustadas equa es de regress o linear, tendo como variável independente, a ET0 –PM, e, como variáveis dependentes, a ET0 – H&S, a ET0 – L, a ET0 – TA e a EV – MT. Os valores de ET0 – H&S, ET0 – L, ET0 – TA e EV – MT apresentaram boa correla o e superestimaram a ET0 – PM. As regress es entre a ET0 – PM (método padr o) e a ET0, calculadas pelos métodos estudados e, entre ET0 – PM e a evapora o do minitanque, apresentaram maiores coeficientes de determina o no período sem chuvas.
Crescimento e Produtividade da Cultura do Algod o em Resposta a Aplica o de Fósforo e Métodos de Irriga o
Carlos Henrique Batista,Leonardo Angelo de Aquino,Tarcísio Ramos Silva,Heider Rodrigo Ferreira Silva
Revista Brasileira de Agricultura Irrigada , 2010, DOI: 10.7127/rbai.v4n400035
Abstract: O teor de água do solo tem grande influência sobre a absor o de fósforo e produtividade do algodoeiro. Objetivou-se avaliar a influência de diferentes métodos de irriga o e doses de aduba o fosfatada sobre o crescimento e produtividade do algodoeiro na regi o norte do estado de Minas Gerais. O experimento foi conduzido no Instituto Federal do Norte de Minas (IFNMG), Campus Januária. Os tratamentos consistiram de três doses de P (0, 50 e 120 kg ha-1 de P2O5) e de três sistemas de cultivo (Aspers o, Gotejamento e Sequeiro). Adotou-se o delineamento em blocos casualizados, em esquema fatorial, com três repeti es. Aos 50 e 80 dias após a emergência (DAE) coletaram-se folhas, caules e estruturas reprodutivas. Cada órg o foi seco, e após triturado foi determinado o teor de P. Aos 80 DAE foi avaliado a altura e o número de estruturas reprodutivas por planta. Na colheita avaliou-se a massa e o número de capulhos por planta, o rendimento de fibra e a produtividade de algod o em caro o. A irriga o aumentou o número de estruturas reprodutivas, a altura de plantas, o número de capulhos por planta e a produtividade do algodoeiro. A aplica o do P aumentou o número de capulhos por planta e a produtividade de algod o em caro o. N o houve diferen a na altura de plantas, número de capulhos por planta e na produtividade de algod o em caro o entre os cultivos irrigados por aspers o convencional ou por gotejamento. O maior rendimento de fibra ocorreu nos cultivos irrigados, especialmente no irrigado por gotejamento. O maior conteúdo de P foi observado nos cultivos irrigados, independente do método de irriga o.
Parcelamento de fósforo em algodoeiro irrigado
Aquino, Leonardo Angelo de;Berger, Paulo Geraldo;Neves, Júlio César Lima;Lima, Tricia Costa;Aquino, Rosiane Filomena Batista Almeida de;
Pesquisa Agropecuária Tropical , 2012, DOI: 10.1590/S1983-40632012000100001
Abstract: most regions where cotton is cultivated in brazil present low soil fertility, especially concerning the available phosphorus (p). this study aimed to evaluate the phosphorus split application on irrigated cotton, for reaching a higher phosphate fertilization efficiency, in comparison to the traditional application at sowing. the experiment was conducted in quartzarenic neosol with 22 mg dm-3 of p (medium availability), in the north region of the minas gerais state, brazil. the design used was randomized blocks, in a (4x3) + 3 factorial scheme, with three replications. treatments consisted of p2o5 doses (0 kg ha-1, 30 kg ha-1, 60 kg ha-1, 120 kg ha-1, and 180 kg ha-1) and three split applications (80% and 20%; 60% and 40%; 40% and 60% of the p dose applied respectively at sowing and at 35 days after emergence (dae)), plus the application of 0 kg ha-1, 60 kg ha-1, and 120 kg ha-1 of p2o5 at sowing. the p source was the granulated triple superphosphate, and the p content in the shoots increased according to the doses applied. nutrient contents in the index leaf, except for p, were not influenced by p levels and split applications. the p content in the index leaf and the number of cotton bolls per plant increased with the increment of p doses, but were not affected by the phosphate fertilizer split application. the application of 40% of the p dose at sowing and the remaining amount split at 35 dae decreased the cotton boll yield, with no significant effect for the other split applications.
Estimativa da área foliar do girassol por método n?o destrutivo
Aquino, Leonardo Angelo de;Santos Júnior, Valdeir Celestino dos;Guerra, Jo?o Victor Santos;Costa, Marileide Moreira;
Bragantia , 2011, DOI: 10.1590/S0006-87052011000400015
Abstract: simple, rapid, and non-destructive methods that help to estimate leaf area accurately are very important to assess plant growth under field conditions. the objective of this study was to adjust equations to estimate the area of a single sunflower leaf and also the area of total leaves per plant as a function of linear measurements of them. it was also verified the possibility of using common models for the sunflower cultivars br-122 and m-734. six plants of each cultivar in the early stage of flowering and full flowering were harvested. the area of each leaf was determined by the direct method. the length along the midrib and the width perpendicular to leaf insertion in the petiole were determined. linear, quadratic, cubic, exponential, and potential models were adjusted. the potential models ?i = 1.6329xi1,7164 and ?i = 0.5405xi1,0212 using the width measurements and width x length, respectively, were the most adequate to estimate the leaf area. the model ?i = 5.1014xi2,4383 allowed to precisely estimate the total leaf area according to the number of leaves per plant. the accuracy of the adjusted equations to estimate each leaf are and total leaves area was not reduced when common models were adjusted to the two cultivars used.
Produ??o de biomassa, teor e exporta??o de macronutrientes em plantas de repolho em fun??o de doses de nitrogênio e de espa?amentos
Aquino, Leonardo Angelo de;Puiatti, Mário;Lélis, Marcelo Magri;Pereira, Paulo Roberto Gomes;Pereira, Francisco Hevilásio Freire;
Ciência e Agrotecnologia , 2009, DOI: 10.1590/S1413-70542009000500014
Abstract: the effects of three plant spacings (80x30, 60x30, and 40x30 cm) and five nitrogen rates (0, 75, 150, 225, and 300 kg ha-1) were evaluated on biomass yield, macronutrient uptake and tissue concentration of cabbage. a field experiment was carried out at the universidade federal de vi?osa from 09/23 to 12/20/2002. the experiment was set in a split-plot design with four replications. spacings were assigned to the main plots and the n rates were set in the split-plot, arranged in a completely randomized design. at the harvest time, leaves were detached, oven dried and analyzed for n (n-no3- and n-total), p, k, ca, mg, and s contents. increasing n rates led to an increase in biomass yield, n (n-no3- and n-total), p, and mg contents and macronutrient uptake of cabbage. increasing plant spacings led to lower biomass yield and k uptake and increase in n (n-no3- and n-total), p, s, and ca contents of cabbage.
Controle alternativo da mancha de Ramularia do algodoeiro
Aquino, Leonardo Angelo de;Berger, Paulo Geraldo;Rodrigues, Fabrício de ávila;Zambolim, Laércio;Ogoshi, Fernando;Miranda, Lucas M.;Lélis, Marcelo Magri;
Summa Phytopathologica , 2008, DOI: 10.1590/S0100-54052008000200004
Abstract: areolate mildew, caused by the fungus ramularia gossypii (speg.) cif., is the most important foliar disease on cotton. there are a few products available to the growers to manage this disease among them the fungicides tryazol and strobilurine. this study aimed to evaluate the effect of foliar application of potassium silicate, 'calda vi?osa' e protector fungicides (mancozeb and clorothalonyl) to control areolate mildew on cotton. the potassium silicate was not efficient to control the disease with severity of 15.38%, canopy quality at 166 days after plant emergence of 38.19%, yield of 2041.65 kg ha-1 and area under areolate mildew progress curve of 644, 598 and 172 at the lower, medium and higher canoy, respectively, with these all values being similar to the check treatment (no fungicide applied). the treatment with 'calda vi?osa' gave the best disease control and did not differ from the treatments with pyraclostrobin or tebuconazole in terms of yield, but showed an increase of 88% in yield compared to the check treatment. the fungicides mancozeb and clorothalonyl mixed with 'calda vi?osa' or with tebuconazole were efficient to control the disease, especially the mixture of mancozeb with tebuconazole.
Crescimento e produ??o de taro 'Chinês' influenciados por tipos de mudas e camadas de baga?o de cana-de-a?úcar
Puiatti, Mário;Pereira, Francisco H.F.;Aquino, Leonardo Angelo;
Horticultura Brasileira , 2004, DOI: 10.1590/S0102-05362004000400011
Abstract: two consecutive experiments were carried out, in the same area, from 11/19/1997 to 08/08/1998 (experiment i) and from 09/01/1998 to 06/06/1999 (experiment ii), with taro 'chinês' (bgh 5928). the experiments consisted of 28 treatments, in a randomized complete block design, arranged in a factorial 4 x 7 (types of seedlings x layers of sugar-cane mulch), with three repetitions. in experiment i the effect of four types of seedlings were evaluated (corm and comels large, medium and small, with 80; 55; 35 and 20 g of medium fresh mass, respectively) and seven thickness of mulch layers on covering (0; 4; 8; 12; 16; 20 and 24 cm). in experiment ii the residual effect of the mulch layers used in experiment i was evaluated, the same types of seedlings staying with similar masses. the stand and height of plants, leaf area index (lai) and final corm yield and classes of cormels were evaluated. smaller stands were obtained in experiment i and for the type of seedling graded as small cormel, mainly in the absence of mulch. seedlings with larger masses and intermediate layers of mulch provided more vigorous plants and with higher values of lai. there was no interaction between mulch layers x types of seedlings, for yield of corm and cormels, in both experiments. in experiment i significant effect was verified for both factors, separately, with larger yield of total and commercial cormels obtained for the type seedling corm (head), followed by large cormel, and mulch layer from 16.4 to 17.4 cm of thickness. in experiment ii, an evident effect of types of seedlings with larger yield of total and commercial cormels for the seedlings types corm and large cormel was observed.
Elabora??o e valida??o de escala diagramática para quantifica??o da mancha de ramularia do algodoeiro
Aquino, Leonardo Angelo;Berger, Paulo Geraldo;Rodrigues, Fabrício ávila;Zambolim, Laércio;Hernandez, Juan Felipe Rivera;Miranda, Lucas Mattos;
Summa Phytopathologica , 2008, DOI: 10.1590/S0100-54052008000400012
Abstract: this study aimed to elaborate and validate a diagrammatic scale to assess areolate mildew on cotton leaves. the proposed scale showed disease levels of 0.05, 0.50, 1.0, 2.0, 4.0, 8.0, 16.0, 32.0 and 67.20%. the scale showed to be adequate to evaluate areolate mildew due to an increase in accuracy, precision, and reproductibility during disease evaluations.
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