Assessment of nutrient returns in a tropical dry forest after clear-cut without burning

Abstract

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Propiedades del suelo afectadas por el tiempo de descanso en un sistema de roza-tumba-quema

“…Mientras que Kotto-Same et al (1997) encontraron una fuerte correlación lineal positiva entre el tiempo de descanso y el carbono total del sistema en un área tropical húmeda. La biomasa de la hojarasca en los bosques tropicales secos no es tanta, comparada con la producida en áreas de trópico húmedo, aun así, representa un reservorio significativo en el reciclaje del carbono y otros nutrientes (Amorim et al 2014). No obstante, el suministro más importante de carbono proviene de la constante regeneración de las raíces finas, fenómeno que fue descrito por Castellanos et al (2001), quienes señalan que el tiempo medio de residencia de las raíces finas es menor que el de otros residuos vegetales, incorporándose más pronto al suelo, llegando a tener aportes de biomasa significativos en condiciones naturales.…”

“…El cambio de uso de tierra mediante esta técnica, en condiciones de trópico seco, modifica el ciclo de nutrientes (Amorim et al 2014), y presenta mayor disponibilidad de estos después de la quema (Giardina et al 2000a); aunque hay evidencia de que estos incrementos son significativos después del primer mes del fuego (Singh et al 2017). Con frecuencia, el carbono lábil resultante de la quema incrementa la actividad microbiológica, misma que facilita múltiples procesos en el ambiente edáfico (Giardina et al 2000b).…”

Manipulation of Natural Grassland in Semiarid Region: A Review

“…According Araújo Filho (2013) the deforestation in the Caatinga already reaches 46% of the entire biome, and this number has increased on average by 2.7% per year, reflecting in the botanical composition. Amorim et al (2014), point out that in most cases the degradation process begins with agriculture, and when it is no longer satisfactory, the area is abandoned and others are deforested.…”

Fallow Reduces Soil Losses and Increases Carbon Stock in Caatinga

“…However H D was not favoured by this dynamic because, besides the absence of Mimosa hostiles, animals continually consume the vegetation, incorporating into their bone structure and milk most of the Ca accumulated in the plants (Ebeledike et al, 2010). The concentrations of Na and K in the runoff in H F are also due to greater amounts of these elements in plant debris from the species that developed on the fallow area (Amorim et al, 2014). Because these elements are not bound as compounds in the plant tissue, they are easily released into the soil solution by decomposition, making them susceptible to loss through runoff (Araújo & Costa, 2013).…”