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| Beckmann-Cavalcante,Márkilla Z.; Amaral,Genilda C.; Silva,Alcimar de S. e; Brito,Leonardo P. da S.; Lima,Augusto M. N.; Cavalcante,Ítalo H. L.. |
| ABSTRACT This study aimed to evaluate the effect of nitrogen (N) and potassium (K) fertilization in yield and contents of macronutrients in heliconia plants (Heliconia psittacorum x Heliconia spathocircinata Aristeguieta) cv. Golden Torch. The experiment was set in a randomized block design, in a 4 x 4 factorial, corresponding to N doses (0, 120, 180 and 240 g of N hole-1) and K doses (0, 120, 180 and 240 g of K2O hole-1) with four replicates and five rhizomes per plot, under field conditions. After one year of cultivation, yield (number of flower stems per square meter) and the leaf contents of N, P, K, Ca, Mg and S were determined. The applied N doses did not influence either yield or the leaf contents of the evaluated macronutrients. K fertilization... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heliconia psittacorum; Floriculture; Fertilization; Nutritional status. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000400337 |
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| Santos,João B. dos; Santos,Delfran B. dos; Azevedo,Carlos A. V. de; Rebequi,Alex M.; Cavalcante,Lourival F.; Cavalcante,Ítalo H. L.. |
| Um experimento foi conduzido na estação experimental de Irrigação e Drenagem do Instituto Federal Baiano, para avaliar o crescimento da mamoneira BRS Energia, em função da salinidade da água de irrigação, em sistema de lisimetria. Os tratamentos foram constituídos dos níveis de salinidade da água de 0,12; 0,8; 1,6; 2,4; 3,2; 4,0 e 4,8 dS m-1, dispostos em delineamento inteiramente casualizado, com três repetições e quatro plantas por tratamento. Quinzenalmente foram avaliados, dos 20 até os 80 dias após a emergência, o crescimento e as taxas de crescimento absoluto e relativo da altura de plantas, diâmetro do caule e a área foliar das plantas. O crescimento avaliado pela altura, diâmetro do caule, área foliar e as taxas de crescimento absoluto e relativo... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ricinus communis; Água de qualidade inferior; Biodiesel. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662013000200005 |
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| Miranda,João M. de S.; Cavalcante,Ítalo H. L.; Oliveira,Inez V. de M.; Lopes,Paulo R. C.; Assis,Joston S. de. |
| ABSTRACTThe production of high quality fruits is a necessary factor for the adaptation and production of plant species with economic viability. Thus, an experiment was conducted from July 2012 to January 2013 to evaluate the fruit quality of the ‘Eva’ and ‘Princesa’ apple cultivars as a function of nitrogen fertilization in Petrolina, PE, Brazil. The experimental design consisted of randomized blocks, with treatments distributed in a factorial arrangement 2 x 4, corresponding to apple cultivars (Eva and Princesa) and nitrogen doses (40; 80; 120 and 160 kg of N ha-1), with four replications and three plants in each plot. The fruit characteristics, such as fruit mass, skin color (luminosity, chromaticity, and colour angle), size (width and length), pulp... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Malus domestica; Nitrogen; Post-harvest. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001000967 |
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| Silva Júnior,Gabriel B. da; Santos,Eduardo M. dos; Silva,Roberto L.; Cavalcante,Ítalo H. L.. |
| ABSTRACT As a strategy to minimize N losses in the soil, mineral N sources, such as polymer-coated urea, have been studied as possibility to increase the synchronization of N release by the fertilizer and its absorption by plants. Thus, this study aimed to evaluate the contents of macronutrients and the production of Formosa papaya as a function of sources and doses of N fertilizer applied as top-dressing in the region of Bom Jesus-PI, Brazil. The treatments were arranged in a 2 x 4 factorial scheme corresponding to N sources (coated urea and conventional urea) and N doses (350, 440, 530 and 620 g plant-1 of N), with four replicates and four plants per plot. The contents of macronutrients in the leaf dry matter and fruit production were evaluated. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carica papaya L.; Controlled release fertilizer; Plant nutrition; Fruit yield. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000400322 |
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| Carneiro,Marcio A.; Lima,Augusto M. N.; Cavalcante,Ítalo H. L.; Cunha,Jailson C.; Rodrigues,Marcos S.; Lessa,Thiago B. da S.. |
| ABSTRACT Irrigated fruit crops have an important role in the economic and social aspects in the region of the Sub-middle São Francisco River Valley. Thus, the aim of this study was to evaluate soil salinity and the productive aspects of the mango crop, cv. Tommy Atkins, fertigated with doses of potassium chloride (KCl) and potassium sulfate (K2SO4) during two crop cycles (from January to March 2014 and from January to March 2015). The experiment was carried out in a strip-split-plot design and five potassium doses (50, 75, 100, 125 and 150% of the recommended dose) as plots and two potassium sources (KCl and K2SO4) as subplots, with four replicates. Soil electrical conductivity (EC), exchangeable sodium (Na+) and potassium (K+) contents and pH were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Electrical conductivity; Plant nutrition; Mangifera indica L.; Semi-arid region. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000500310 |
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| Cavalcante,Lourival F.; Cavalcante,Ítalo H. L.; Pereira,Kátia S. N.; Oliveira,Francisco A. de; Gondim,Saulo C.; Araújo,Fernanda A. R. de. |
| The present study was carried in order to evaluate the effect of saline water irrigation with electrical conductivity (ECw) of 0.5; 1.5; 3.0; 4.5 and 6.0 dS m-1, on germination and some growth variables during the seedling formation process of four guava cultivars (Psidium guajava L.): Pentecoste, Paluma, Surubim and IPA B-38. Water salinity inhibited the germination process, plant height, stem diameter, leaf area and dry matter production of roots, stems and leaves, independently of cultivar. After germination, the seedlings did not survive due to saline water effects of ECw 4.5 and 6.0 dS m-1. After 180 days of sowing, the seedlings irrigated with ECw more than 1.5 dS m-1 did not present agronomic quality for planting. Dry matter production sequence of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seedling production; Salinity; Psidium guajava. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662005000400012 |
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| Albano,Francisca G.; Cavalcante,Ítalo H. L.; Machado,Jailson S.; Lacerda,Claudivan F. de; Silva,Esdras R. da; Sousa,Humberto G. de. |
| ABSTRACT The use of organic waste in the composition of substrates for seedlings constitutes an alternative to the recycling of these materials. Thus, an experiment was conducted with the objective to evaluate the production of ‘Formosa’ papaya seedlings in substrate containing carnauba wax residue, under foliar fertilization. The experimental design was completely randomized with five replicates, with treatments distributed in a 5 x 2 factorial scheme, corresponding to five materials used as substrates, in the presence and absence of foliar fertilization. The materials used were: earthworm humus, carnauba residue + fresh rice husk; carnauba residue in powder; carnauba residue semi-decomposed and mixture of carnauba residues: carnauba residue + fresh rice... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carica papaya; Quality seedlings; Mineral nutrition. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000200128 |
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