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El modelo sistémico para la fertilización nitrogenada en brócoli (Brassica oleracea itálica). Colegio de Postgraduados
Cartagena Ayala, Yamil Everaldo.
La aplicación de nitrógeno para la producción de brócoli suele ser ajustada con base en criterios empíricos con el riesgo de llegar a dosis excesivas. En este sentido, una alternativa para precisar la cantidad de nitrógeno que debe agregarse es a través de la evaluación cuantitativa de la demanda nitrogenada del cultivo, el suministro de nitrógeno del suelo y la eficiencia de la fertilización nitrogenada. Se realizaron dos experimentos (octubre de 2012 a enero de 2013 y abril a julio del 2013) en el Campo Experimental Tlapeaxco de la Universidad Autónoma Chapingo, México. Los factores en estudio para el primer experimento fueron: láminas de riego (3 y 6 mm) y dosis de nitrógeno (80, 160, 240 y 320 kg ha-1), y para el segundo experimento las dosis de...
Palavras-chave: Peso fresco; Biomasa; Nitrógeno acumulado; Inflorescencia; Fresh weight; Biomass; Accumulated nitrogen; Inflorescence; Edafología; Doctorado.
Ano: 2014 URL: http://hdl.handle.net/10521/2390
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Yield and postharvest quality of winter growing crisphead lettuce as affected by doses of nitrogen and molybdenum Horticultura Brasileira
Resende,Geraldo M de; Alvarenga,Marco Antônio R; Yuri,Jony E; Souza,Rovilson José de.
The trial was carried out at Três Pontas, Minas Gerais State, Brazil, from April to July 2003, to evaluate the influence of nitrogen and molybdenum rates on productive characteristics and postharvest quality of crisphead lettuce (Lactuca sativa L.). A randomized complete block design with three replications was used. Treatments were a factorial combination of four nitrogen rates (0.0; 60.0; 120.0 and 180.0 kg ha-1) applied in additional the dose commonly used by growers (60 kg ha-1 of N) and five foliar molybdenum rates (0.0; 35.1; 70.2; 105.3 and 140.4 g ha-1). The total and commercial fresh weight and head circumference showed significant effects for doses of nitrogen and of molybdenum, as well as for their interaction. No significant effects of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lactuca sativa L.; Fresh weight; Nutrition; Storage.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362010000400011
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Influence of genotype on protein and oil concentration of soybean seeds BABT
Santos,Esmael Lopes dos; Pípolo,Antonio Eduardo; Faria,Ricardo Tadeu de; Prete,Cássio Egidio Cavenaghi.
Aiming at evaluating genotype influence on the concentration of protein and oil, immature seeds of cultivars CD 202 and CD 206 were removed from the mother-plant, in the stage R5, and were grown in vitro, in a liquid culture medium which contained 20, 40 and 60 mM of glutamine, during eight days. Afterwards, the concentrations of oil and protein were compared to the contents of the seeds cultivated in vivo. With a higher availability of glutamine for the seed, there was an increase of protein content. The genotypes were statistically different as far as the protein concentration was concerned,which confirmed that the genotype had influence on the concentration of protein in the seed. Oil and protein concentrations were inversely related when a variation of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glutamine; Fresh weight; Seed composition; In vitro growth and Glycine max.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000400007
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