Changes in soil phosphorus and acid phosphatase activity immediately following forest fires

Saa, Antonio; Trasar-Cepeda, Carmen; Gil‐Sotres, F.; Carballas, T.

doi:10.1016/0038-0717(93)90218-z

Cited by 123 publications

(53 citation statements)

References 14 publications

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“…Such temperatures are able to strongly modify the quality of organic matter and change, in the meantime, the chemical environment in which the microbial biomass expresses its catalytic performances. In this range of temperatures, potentially detrimental changes in mineral soil composition can also occur, as reported by Saa et al [32].…”

Section: Discussionsupporting

confidence: 54%

Effect of fire on soil C, N and microbial biomass

et al. 2004

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-Fire is recognised as a potent ecological factor in woody and bushy environments. In this investigation the effect of experimental fire on soluble organic C and N, soil microbial biomass C and N, the bacteria/fungi ratio and soil enzymatic activities were measured 12 and 18 months after fire in a Lithic Xerocrept soil. The soil soluble C was changed both by fire and sampling time in burned soils, whereas soluble N did not show any clear trend. The enzymatic activities were decreased by fire, but a peak of activity was recorded in soil burned at 309 °C, which corresponded with the highest recorded soluble C. A quantitative reduction in soil microbial biomass C and N was observed.

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Section: Discussionsupporting

confidence: 54%

Effect of fire on soil C, N and microbial biomass

et al. 2004

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“…Although not significant, enzyme activity in burned subcanopies generally was lower compared to unburned controls. Soil enzyme activities declined due to heat deactivation (Saa et al 1993, Hernandez et al 1997, Staddon et al 1998). The insulating properties of soil and brief exposure of the soil surface to high temperatures generally limits the depth of deactivation to 2 cm (Aston and Gill 1976).…”

Section: Results and Discussion Visible Effects Of Prescribed Burningmentioning

confidence: 99%

Restoring riparian corridors with fire: effects on soil and vegetation

Blank¹,

Chambers²,

Zamudio³

2003

REM

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In many riparian corridors of the semi-arid west, stream incision has resulted in lowered water tables, basin big sagebrush (Artemisia tridentata var. tridentata Nutt.) encroachment and the loss of the dominant herbaceous vegetation. To determine the potential for restoring basin big sagebrush-dominated riparian corridors to greater herbaceous cover, a fall prescribed burn on sites with relatively shallow (-153 to -267 cm) and deep (-268 to > -300 cm) water tables was conducted. We evaluated the separate and interacting effects of water table depth and burning on total soil C and N, soil nutrient availability, and soil enzyme activities by microsite (sagebrush subcanopy, sagebrush interspace), and soil depth (ash/liter, 0-2, 2-5, and 10-20 cm ResumenEn muchos corredores riberenos del oeste semiarido la incision de corrientes ha resultado en mantos freaticos mas bajos, la expansion de "Basin big sagebrush" (Artemisia tridentata var. tridentata Nutt.) y la perdida de vegetacion herbacea dominante.Para determiner el potencial para restaurar los corredores riberenos dominados por "Basin big sagebrush con una mayor cobertura herbacea se llevo a cabo un fuego prescrito en otono en sitios con mantos freaticos relativamente poco profundos (-153 to -267 cm) y mantos freaticos profundos (-268 to > -300 cm). Evaluamos los efectos separados a interactuantes de la profundidad del manto freatico y la quema en el C y N total del suelo, la disponibilidad de nutrientes del suelo y las actividades enzimaticas del suelo por micrositio ("Sagebrush" subcopa, "Sagebrush" interespacio) y profundidad del suelo (ceniza /mantillo, 0-2, 2-5 y 10-20 cm). Tres anos despues del fuego prescrito se midio por micrositio, el contenido de nutrientes de los tejidos de "Silvery lupine" (Lupinus argenteus Pursh) y "Douglas sedge" (Carex douglasii Boott), creciendo en areas quemadas y sin quemar de un sitio con manto freatico somero. La influencia del fuego en los atrrbutos del suelo se limito principalmente a los 5 cm superiores. Como consecuencia del fuego prescrito, los sitios con manto freatico profundo perdieron relativamente mas N y C de los horizontes con mantillo y liberaron mas Ca+2 soluble en agua de los horizontes minerales de 0-2 cm que los horizontes correspondientes en los sitios con manto freatico poco profundo. En general, comparado con los controles sin quemar, la quema (1) incremento el 5042 extractables en agua, K+ y KClextractable NH4, (2) Disminuyo la actividad de las enzimas asparaginasa, ureasa y acido-fosfatasa y (3) disminuyo el KClextractable, N03-y los ortho-P soluble en agua. De los 16 atributos de suelo medidos, 7 fueron influenciados por un efecto principal de micrositio y/o interaccion. El tejido nuevo de "Silvery lupine"en las parcelas quemadas tuvo mayor contenido de N, Zn y Fe (solo en los micrositios de abajo de la copa) y menos Ca que las plantas en las parcelas control; el nuevo tejido del "Douglas sedge"tuvo mas S y menos Na, P y Zn. Z. Los resultados indican que la quema sola es un tratamiento apropiad...

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“…A significant part of the P in microbial tissue may be present as inorganic P, and some inorganic P may be formed by the phosphatase-catalysed hydrolysis of cellular organic P (Brookes et al 1982;Speir et al 1986). Giovannini et al (1990) and Saa et al (1993) found that soil heating produced an intense mineralising effect on organic phosphorus resulting in an increase in inorganic P.…”

Section: Introductionmentioning

confidence: 97%

Changes in heated and autoclaved forest soils of S.E. Australia. II. Phosphorus and phosphatase activity

Serrasolsas

Khanna

1995

Biogeochemistry

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Abstract. The effect of soil heat and autoclaving on labile inorganic P (Bray I), microbial P (P-flush) and on phosphatase activity was studied by heating five forest soils in the laboratory, which simulated the effects of heat during bushfires. Top soil was heated to 60 'C, 120 'C and 250 "C or autoclaved for 30 minutes. Soils were analysed immediately after heating and during seven months of incubation to assess immediate and longer-term effects of heating.Labile inorganic P increased immediately after heating and autoclaving soils, with the highest amount recorded for the 250 'C treatment. Phosphorus associated with microbial biomass decreased with heat, and none or small amounts were detected in soils heated to 250 "C and autoclaved, because high temperatures killed the microbial population. Most of the P released from microbes acted as a source of labile inorganic P in soils low in inorganic P, and some of the released P was fixed by the soil. In one soil high in inorganic labile P and with undetectable amounts of microbial-P, the increase in Bray P on heating could only be assigned to solubilisation of other sources of total P. Because high temperatures denature enzymatic proteins, phosphatase activity diminished with the increase in temperature, and no activity was detected in 250 'C and autoclaved soils.Phosphorus released by heating decreased during incubation in three of the five soils studied, approaching values observed in unheated soils. Simultaneously, an increase in microbial P was observed in these heated soils, indicating that the partial recovery of microbial biomass acted as a sink for the decrease in Bray-P measured. Phosphatase activity recovered only partially during incubation of heated soils.

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Changes in soil phosphorus and acid phosphatase activity immediately following forest fires

Cited by 123 publications

References 14 publications

Effect of fire on soil C, N and microbial biomass

Effect of fire on soil C, N and microbial biomass

Restoring riparian corridors with fire: effects on soil and vegetation

Changes in heated and autoclaved forest soils of S.E. Australia. II. Phosphorus and phosphatase activity

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