Results: 32

Ingreso de nitrógeno y fósforo al lago Atitlán (Guatemala) vía deposición atmosférica

Cienc. tecnol. salud; 9 (1), 2022
La deposición de nutrientes por vía atmosférica tiene graves impactos sobre la ecología de bosques y cuerpos de agua templados. Sin embargo, su importancia en cuerpos de agua neotropicales casi no ha sido estudiada. En este artículo se cuantifica la contribución de nitrógeno inorgánico disuelto (...

Efficiency of nitrogen use by sesame genotypes under brazilian semi-arid conditions

Biosci. j. (Online); 37 (), 2021
Nitrogen (N) is an essential macronutrient for plant growth and rate applications can influence the performance of sesame, and when applied in excess can cause nitrogen loss in the environment, and consequently make the cost of production more costly to the producer. Therefore, the objective of this work...

Cytogenotoxic effects of nitrogen on hydroponic lettuce

Biosci. j. (Online); 36 (Supplement1), 2020
Nitrogen accumulation in hydroponically-grown lettuce may pose a health risk to consumers. Thus, the objective of this study was to analyze different concentrations of nitrogen applications in hydroponic lettuce cultivation and their effect on toxicity, cytotoxicity and genotoxicity. A nutrient film tech...

Nutritional assessment in chronic kidney disease: the protagonism of longitudinal measurement

J. bras. nefrol; 42 (1), 2020

Dinámica del consumo y aporte de nutrientes de fitoplancton, dominado por Microcystis sp. (Cyanophyceae) del lago de Amatitlán

Cienc. tecnol. salud; 7 (1), 2020
El impacto antrópico cercano al lago de Amatitlán ha generado niveles altos de eutrofización que conllevan cambios en la dinámica del ecosistema. Uno de ellos es la proliferación de cianobacterias del género Microcystis que pueden llegar a ser perjudiciales para la fauna y flora de lugar e incluso ...

Evaluación anual del fitoplancton y su respuesta a la calidad de agua en el lago de Amatitlán, Guatemala

Cienc. tecnol. salud; 7 (2), 2020
Se realizó un estudio sobre la composición y abundancia del fitoplancton en el lago de Amatitlán, y el efecto de la calidad de agua sobre su biodiversidad. Para ello, se colectaron muestras de agua en cuatro puntos específicos del lago, en la superficie del agua y a profundidades de 5, 10 y 20 m, de ...

Environmental Soil Phosphorus Threshold under No-Tillage and Swine Manure Application

Braz. arch. biol. technol; 63 (spe), 2020
Abstract Swine manure is applied in agricultural fields as a source of nutrients for plant growth, however, excessive application over the years can promote soil phosphorus (P) accumulation. The objective of this study was to establish the environmental soil P threshold based on the degree of P saturatio...

System Fertilization: a Viable Practice for Black Oat-soybean Crop

Braz. arch. biol. technol; 63 (spe), 2020
Abstract System fertilization is characterized by partial or total fertilizer application at the predecessor crop; and it can be a viable practice to soybean crop. This study aimed to determine the fertilizer management and fertilizer levels for black oat-soybean cropping system, in high fertility soils ...

Does Dairy Liquid Manure Complementary to Mineral Fertilization Increase Grain Yield Due to Changes in Soil Fertility?

Braz. arch. biol. technol; 63 (spe), 2020
Abstract The main destination of manure is the application to croplands near livestock farms as nutrient source to enhance crop production. The aim of this study was to define the dairy liquid manure (DLM) dose, complementary to the mineral fertilizer, for higher crops yield, in rotation black oat-maize-...

Soil Microbiological Attributes Under Ecological Restoration Technologies in Subtropical Forest

Braz. arch. biol. technol; 63 (spe), 2020
Abstract To accelerate the recovery of degraded environments, it is necessary to use ecological restoration techniques, which require validation according to the ecosystem conditions where are implemented. This work aimed to evaluate soil microbiological attributes under different ecological restoration ...