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| Guimarães,Francisco Valderez Augusto; Lacerda,Claudivan Feitosa de; Marques,Elton Camelo; Abreu,Carlos Eduardo Braga de; Aquino,Boanerges Freire de; Prisco,José Tarquinio; Gomes-Filho,Enéas. |
| The growth and nutrient assimilation was evaluated in CaCl2- and CaSO4-supplemented cowpea plants subjected to salt stress (75 mM NaCl). The salinity significantly reduced the cowpea vegetative growth. The addition of CaCl2 in the growth medium did not significantly affect plant growth, while for the CaSO4, the beneficial effects of Ca2+ were moderate. Salinity increased the Na+, K+, Cl-, N and P content in the plants, however it decreased the content of Ca2+ and Mg2+. Increases in Ca2+ concentration in the nutrient solution caused decreases in the Na+ and Mg2+ contents and increases in Ca2+, K+, P, and Cl- contents. The supplemental Ca2+ may alleviate the Na+ toxicity and may improve nutritional and ionic balance in cowpea, but it cannot overcome the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Calcium; Mineral nutrition; Salinity; Vigna unguiculata. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000100003 |
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| Corrêa,Márcio Cleber de Medeiros; Almeida,Edmilson Igor Bernardo; Marques,Virna Braga; Silva,Júlio César do Vale; Aquino,Boanerges Freire de. |
| Com o objetivo de avaliar a interferência da relação fósforo-zinco sobre o crescimento inicial de pitaia para fornecer informações que subsidiem a definição de sistemas de produção mais adequados para a exploração desta cultura no Brasil, realizou-se o experimento, testando cinco doses de P (0; 75; 150; 225 e 300 mg dm-3) e Zn (0; 2; 4; 6 e 8 mg dm-3), sendo os níveis de cada nutriente arranjados em esquema fatorial 5x5, com quatro blocos. Para a interação significativa (p<0,05), procedeu-se ao ajuste em superfícies de resposta do tipo Y = β0 + β1(A) + β2(A)² + β3(B) + β4(B)² + β5(A).( B) + e. As estimativas das correlações fenotípicas foram obtidas considerando apenas o intervalo das doses de P e Zn que promoveram as melhores respostas do acesso de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adubação; Cactaceae; Frutífera exótica; Hylocereus undatus; Interação entre nutrientes. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452014000100032 |
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| Albuquerque,Gustavo Henrique da Silva; Soares,Ismail; Aquino,Boanerges Freire de; Miranda,Fabio Rodrigues de; Dutra,Indalécio. |
| ABSTRACT The study aimed to evaluate the effect of different NPK doses on the yield components of papaya hybrid 'Caliman 01'. The experiment was carried at the company WG Fruticultura, located in the Chapada do Apodi region. Five nitrogen doses (94, 590, 837, 1088 and 1575 kg N ha-1), five phosphorus doses (10, 72, 96, 133 and 195 kg P2O5 ha-1) and five potassium doses (75, 527, 752, 978 and 1429 kg K2O ha-1), were combined according to the experimental matrix Pan Puebla II, in 16 combinations and distributed in a randomized block design, with five repetitions. The plots consisted of six papaya plants and the four central plants were evaluated. The fertilizers urea, monoammonium phosphate and potassium chloride were used as NPK sources, respectively. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carica papaya L.; Fertilization; Yield. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000400529 |
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