Determination of Total Phosphorus in Soils: A Rapid Perchloric Acid Digestion Procedure

Sommers, L. E.; Nelson, D. W.

doi:10.2136/sssaj1972.03615995003600060020x

Cited by 380 publications

(166 citation statements)

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“…Soil-chemical parameters of particular study plots were analyzed (Table 2), i.e., soil pH (Kubíková 1970), carbon content (Králová et al 1991), total nitrogen content (Tahovská et al 2010), phosphorus content (Murphy & Riley 1962;Watanabe & Olsen 1965;Sommers & Nelson 1972), and soil sodium, potassium and calcium (Kubíková 1970;Nedoma 1990). Soil acidity and the content of soil nutrients were measured once in 2007.…”

Section: Methodsmentioning

confidence: 99%

Community structure of soil oribatida (acari) two years after windthrow in the high tatra mountains

et al. 2013

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Abstract:In November 2004 a catastrophic windstorm destroyed a large part of the spruce forest in the Tatra National Park (Slovakia). The majority of the windthrown area was cleared; only a small part was left uncleared, thereby allowing regeneration by natural succession. The aim of the present study was to assess the impact of the different forestry practices on soil Oribatida. Three different stands were selected for the study, where sampling took place in June and The mean abundance of adults and juveniles was several times higher in stands left for natural development (NEX) than in EXT stands. The highest species richness was observed in REF, followed by NEX and EXT stands. Ordination method showed differences in species composition between studied treatments. Furthermore, a much lower abundance of Hermannia gibba, a dweller of leaf litter and upper soil layers, was recorded in cleared stands compared to the other stands. Indeed, windthrown stands had an obvious lower species richness than control stands. The ordination method used demonstrated a significant influence of both treatment and sampling date on the abundance and species richness of Oribatida. The present study showed that clear-cutting of wind-damaged spruce forest markedly decreases the abundance of soil Oribatida compared with windthrown forest stands left to natural succession.

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Section: Methodsmentioning

confidence: 99%

Community structure of soil oribatida (acari) two years after windthrow in the high tatra mountains

et al. 2013

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“…Total nitrogen in all samples was determined by the Kjeldahl method (Hinds and Lowe 1980). Total P were extracted with perchloric-nitric acid, sulfuric acid and 0.5M NaHCO 3 (pH 8.5), respectively, and were determined spectrophotometrically as blue molybdate-phosphate complexes under partial reduction with ascorbic acid (Sommers and Nelson 1972).…”

Section: Methodsmentioning

confidence: 99%

Soil water potential effects on the cellulase activities of soil treated with sewage sludge

Sinegani¹,

Mahohi²

2010

PLANT SOIL ENVIRON

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To better understand how water stress and availability affect the enzyme activity and microbial communities in soil, we measured the changes of organic carbon (OC), bacteria and fungi populations, and endoglucanase and exoglucanase activities in a semiarid soil treated with air-dried primary sewage sludge at a rate of 20 g/kg. The water potentials established for soil incubation were: saturation (SA, 0 bar), field capacity (FC, -0.3 bar), and permanent wilting point (PWP, -15 bar). An irrigation treatment was a drying-rewetting cycle (DWC) between -0.3 to -15 bars. After 0, 20, 60 and 90 days of incubation soils were sampled for analysis. The addition of sewage sludge increased soil OC, endoglucanase and exoglucanase activities significantly. The effects of soil moisture, incubation time and their interactions on OC, and endoglucanase and exoglucanase activities in soil were significant. During 20 days of incubation, OC, endoglucanase and exoglucanase activities decreased significantly. Soils incubated in DWC and FC compared to soils incubated in SA and PWP had lower OC contents due to organic matter mineralization. Organic C, exoglucanase and endoglucanase activities significantly increased with increasing soil water potential. The activities of exoglucanase and endoglucanase in soils incubated in SA were significantly higher than those in soils incubated in PWP.

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“…Soil-chemical parameters in plots were analyzed from soil samples taken in 2007 from depth of 5-15 cm, i.e. soil pH (Kubíková 1970), carbon (Králová et al 1991), total nitrogen (Tahovská et al 2010), and phosphorus (Sommers & Nelson 1972). Because not all data were normally distributed, Spearman's correlation coefficient was calculated to test relationship between activity of selected species and soil-chemical parameters in study plots.…”

Section: Methodsmentioning

confidence: 99%

The effect of windthrow, wild fire, and management practices on epigeic Collembola in windthrown forest stands of the High Tatra Mts (Slovakia)

2013

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Epigeic communities of Collembola were studied after a windthrow in differently managed spruce forest stands in the High Tatras, Slovakia. Investigations were carried out in following treatments: reference forest stands (REF), windthrown stands left to natural regeneration (NEX), windthrown stands from which fallen wood had been extracted (EXT), and windthrown stands from which fallen wood had been removed and which had been affected by fire (FIR). A KruskalWallis nonparametric ANOVA revealed significant differences of Collembola community composition and activity between the treatments studied, which was also further supported by the results from NMS ordination and cluster analysis using indicator species analysis. EXT stands had communities with remarkably high activity and diversity of Collembola, whereas FIR stands had low species richness and diversity indices compared to other treatments (REF, NEX, EXT). Windthrown stands had greater collembolan activity and diversity (NEX, EXT) than intact forest stands. However, forest specialists and bryophilous species were sensitive to forest clearing and fire disturbance and were replaced by xeroresistant and generalist species, or species preferring open habitats. The collembolan community most similar to that found in REF stands, in terms of community homogeneity and the magnitude of diversity indices, was found in NEX stands.

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Determination of Total Phosphorus in Soils: A Rapid Perchloric Acid Digestion Procedure

Cited by 380 publications

References 0 publications

Community structure of soil oribatida (acari) two years after windthrow in the high tatra mountains

Community structure of soil oribatida (acari) two years after windthrow in the high tatra mountains

Soil water potential effects on the cellulase activities of soil treated with sewage sludge

The effect of windthrow, wild fire, and management practices on epigeic Collembola in windthrown forest stands of the High Tatra Mts (Slovakia)

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