Ayuda
Ir al contenido

Dialnet


Nitrogen mineralization in an Alfisol amended with thermoelectrical industry by-products

  • Autores: Claudio Fernández Herrera, Neal Stolpe Lau, José E. Celis, Marco Sandoval Estrada
  • Localización: Agricultura técnica = Chilean Journal of Agricultural Research, ISSN-e 0718-5839, ISSN 0365-2807, Vol. 77, Nº. 4, 2017, págs. 400-405
  • Idioma: inglés
  • Enlaces
  • Resumen
    • In thermoelectric industry, synthetic gypsum and coal ash are generated as industrial by-products. The objective of this work was to evaluate the effect of different mixtures of synthetic gypsum and coal ash on N mineralization in an Alfisol. Nitrogen mineralization was evaluated by soil incubations under controlled conditions and potential mineralization using the nonlinear first order kinetics model Nmt = N0 [1 - ℮(-k t )] , where Nmt is the mineral N accumulated at a specific time, N0 is the potentially mineralizable N, k is the mineralization rate, and finally t is the incubation time. Treatments consisted of different mixtures of synthetic gypsum, coal ash and urea (M1: 50% synthetic gypsum, 50% coal ash, M2: 50% synthetic gypsum, 35% coal ash, 15% urea, M3: 45% synthetic gypsum; 40% coal ash, 15% urea, M4: 65% synthetic gypsum, 20% coal ash, 15% urea, M5: 55% synthetic gypsum, 30% coal ash, 15% urea). Each mixture was applied to the soil at 2 t ha-1. The results shown the highest concentration (p < 0.05) of net mineral N (NMN) applying M3 (166.14 mg kg-1), while the lowest NMN (p < 0.05) was found applying M5 (98.30 mg kg-1). Treatment M1 presented the highest N0 value (579.0 mg kg-1) respect to treatments with urea in its composition, with exception of M3 (523.4 mg kg-1). Where the highest and lowest k were determined in M5 (k = 0.44990) and M3 (k = 0.04470), respectively. Mixtures of synthetic gypsum, coal ash and urea increased N mineralization over mixtures without urea. Respect N potential mineralization, in some cases N0 and k values would respond more to the fit of the mathematical model employed than to the biological process.

Los metadatos del artículo han sido obtenidos de SciELO Chile

Fundación Dialnet

Dialnet Plus

  • Más información sobre Dialnet Plus

Opciones de compartir

Opciones de entorno