Organic and inorganic soil phosphates and acid phosphatase activity in the rhizosphere of 80-year-old Norway spruce [Picea abies (L.) Karst.] trees

Häussling, M.; Marschner, H.

doi:10.1007/bf00257756

Cited by 145 publications

(67 citation statements)

References 20 publications

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“…The greatest quantity of roots was found in the E horizon and dropped by about 50% in the B horizons. This pattern of decline in root quantity with depth is typical for Skogaby (Majdi and Persson 1993;, and on other Norway spruce forest sites (Häussling and Marschner 1989). Ammonium sulfate and irrigation treatments increased the quantity of fine roots in the E horizon when compared with control.…”

Section: Resultssupporting

confidence: 61%

Rhizospheric P and K in forest soil manipulated with ammonium sulfate and water

Clegg¹,

Gobran²

1997

Can. J. Soil. Sci.

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Clegg, S., Gobran G. R. and Guan, X. 1997. Rhizosphere chemistry in an ammonium sulfate and water manipulated Norway spruce [Picea abies (L.) Karst.] forest. Can. J. Soil Sci. 77: 515-523. The purpose of this study was to examine how the treatments ammonium sulfate, drought and irrigation changed chemical characteristics of three soil fractions (bulk soil, rhizosphere and soil root interface (SRI)) from E, B h and B s horizons of Podzol in a Norway spruce stand in southwestern Sweden. Regardless of the treatment, the properties of the rhizosphere and SRI nearly always differed from the bulk soil due to the high quantity of organic and root material. Irrigation and ammonium sulfate raised water soluble cations and base saturation in the bulk soil. This was possibly due to leaching from the humus and exchange reactions. In the rhizosphere and SRI, irrigation and ammonium sulfate lowered soluble base cations (BC) and base saturation when compared with control; this is attributed to a combination of leaching and high nutrient demand by trees creating a zone of relative depletion. Drought accumulated more organic matter (OM), acidity and cations in the soil fractions suggesting that the lack of water limited transport and uptake of nutrients. Generally, the magnitude of accumulation/depletion of nutrients in the soil fractions reflected the degree of stress which was in turn linked to root uptake of nutrients or to tree growth. Due to the apparent linkage between tree growth, uptake of nutrients and rhizosphere chemistry, we emphasise that soils must be studied at the rhizospheric rather than the bulk soil scale to further understand the effects of environmental stresses. éléments nutritifs observés dans les fractions de sol traduisaient le degré du stress, lequel à son tour était relié à l'absorption racinaire ou à la croissance de l'arbre. Étant donné le lien apparent entre croissance de l'arbre, absorption des nutriments et chimie de la rhizosphère, il découle que les sols doivent être étudiés au niveau de la rhizosphère plutôt qu'à celui du sol libre, si l'on veut comprendre plus en profondeur les effets des stress ambiantaux.

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Section: Resultssupporting

confidence: 61%

Rhizospheric P and K in forest soil manipulated with ammonium sulfate and water

Clegg¹,

Gobran²

1997

Can. J. Soil. Sci.

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“…However, linking model predictions to nutrient uptake under field conditions may not be straightforward (Wild 1989 (Hiiussling and Marschner 1989;Clemensson-Lindell andPersson 1992 Parmelee et al 1993). In this study we propose a conceptual model for the mineral soil-root system (Fig. l), in which the root and its associated organisms maintain a higher level of nutrient availability in the rhizosphere than in the bulk soil.…”

mentioning

confidence: 99%

A conceptual model for nutrient availability in the mineral soil-root system

Gobran¹,

Clegg²

1996

Can. J. Soil. Sci.

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Sci. 76: lZ5-131. We i."opor. a conceptual model based on our results from rhizospheric studies of a-Norway spruce stand growing on a nutrient poor iodzol in Southwest Sweden. We assume that dynamic linkages exist between three soil fractions: bulk soil, rhizosphere Grrto) and soil root interface (SRI). The soil fractions w ere characteized by organic matter content' electrical conductivity, pH, and soluble and exchangeable cations. Analyses showed great differences among the three soil fractions, especially the pioperties of the SRI. Cation exchange capacity and 'base saturation were higher in the rhizosphere and SRI than in the bulk soil. We athibute this to accumulation of organic matter (OM) in the rhizosphere and SRI. Moreover, the rhizosphere and SRI ftactions had lower pH and higher titratableicidity than the bulk soil. Any possible negative-effects of Al to the roots could be offset by accumulated organicinatter and base cations (BC). The calcium-aluminum balance followed a consistent trend: bulk < rhizo < SRI. The results sluggest that soil around the roots.*itibitr a different chemical composition than that of the root-free (bulk) soil, indicating more favor-a6le conditions for roots. We suggest that trees growing on nutrient-poor acid soils invest their energy around roots to create a favorable microenvironment for both roots and miiroorganisms. Our results suggest that existing models which attempt to connect tree growth to soil acidification need modiflrcation. Such

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“…Según Jenkinson (1992), los factores involucrados en la actividad microbiana, tales como temperatura, pH, humedad, disponibilidad de oxígeno, nutrientes inorgánicos y accesibilidad al sustrato, influyen en la descomposición de la materia orgánica. Así también, ha sido señalado que la actividad y estabilidad de las enzimas en el suelo es regulada por muchos factores como pH (Frankenberger & Johanson, 1983;Trasar-Cepeda & Gil-Sotres, 1987;Dick et al, 1988), biomasa microbiana (Saffigna et al, 1989;Häussling & Marschner, 1989;Srivastava & Singh, 1991), vegetación (Juma & Tabatabai, 1978;Harrison, 1983;Perucci et al, 1984;Helal & Dressler, 1987;Tarafdar, 1987), prácticas de manejo del suelo y de los cultivos (Perucci & Scarponi, 1985;Beck, 1990;Martens et al, 1992;Kandeler & Eder, 1993), materia orgánica del suelo (Juma & Tabatabai, 1978;Chhonkar & Tarafdar, 1984;Sparling et al, 1986), minerales de arcilla (Makboul & Ottow, 1979;Huang et al, 1995) y el contenido de humedad del suelo (Harrison, 1983;West et al, 1988 a,b).…”

Section: Introductionunclassified

Efecto De La Humedad, Temperatura Y Ph Del Suelo en La Actividad Microbiana a Nivel De Laboratorio

Vásquez

Zúñiga-Dávila

2008

Ecol. apl.

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ResumenEl presente estudio se realizó con la finalidad de evaluar bajo condiciones de laboratorio, la influencia de tres parámetros físico-químicos sobre la actividad microbiana en un suelo agrícola medida por la cuantificación de la producción de CO 2 y actividad deshidrogenasa. Se realizaron por separado, tres ensayos para 4 porcentajes de humedad %(v/p): 5.0 %, 10.0 %, 15.0 % y 18.0 %; 4 temperaturas: 8.0 ºC, 21.0 ºC, 27.5 ºC y 37.0 ºC; y 4 valores de pH: 4.0, 6.1, 7.8 y 8.2. Cada ensayo de cuatro tratamientos y 4 repeticiones por tratamiento se condujo siguiendo los lineamientos del diseño completamente al azar (DCA). Los mayores valores de actividad microbiana [0.097 mg CO 2 ·g-1·h-1 y 173.09 µg formazán·g-1·(24h)-1] se obtuvieron a 18% de humedad, en condiciones estándares de temperatura y pH; se encontró que la temperatura de 27.5ºC era óptima para producción de CO 2 [0.140 mg CO 2 ·g-1·h-1] y 37.0 ºC para la actividad deshidrogenasa [156.78 µg formazán·g-1·(24h)-1], en condiciones estándares de humedad relativa y pH; y se estableció como pH óptimo aquel cercano a la neutralidad (7.8) [0.055 mg CO 2 ·g-1·h-1, 171.19 µg formazán·g-1·(24h)-1], en condiciones estándares de humedad relativa y temperatura. Palabras clave: Actividad microbiana, producción de CO 2 , actividad deshidrogenasa, humedad, temperatura, pH AbstractThe aim of this study was to evaluate the influence of three physical-chemical parameters on microbial activity of farm soils under controlled laboratory conditions (18% humidity, 27.5 ºC and pH 7.8). Microbial activities were quantified by carbon dioxide production and dehydrogenase activity. Three different essays for 4 moisture percentages (v/w): 5.0%, 10.0%, 15.0% and 18.0%, 4 temperatures: 8.0 °C, 21.0 ºC, 27.5 ºC and 37.0 ºC, and 4 pH values: 4.0, 6.1, 7.8 and 8.2 were evaluated. A Completely Randomized Design (CRD) was used for each essay consisting of four treatments and four replicates per treatment. The highest values on microbial activity [0.097 mg CO 2 ·g-1·h-1 and 173.09 µg formazán·g-1·(24h)-1] were obtained at 18% humidity. It was found out that a temperature of 27.5 ºC was optimum for carbon dioxide production [0.140 mg CO 2 ·g-1·h-1], and 37.0 ºC for dehydrogenase activity [156.78 µg formazán·g-1·(24h)-1]. A near to neutral pH (7.8) was established as optimum [0.055 mg CO 2 ·g-1·h-1and 171.19 µg formazán·g-1·(24h)-1]. Key words: Microbial activity, carbon dioxide production, dehydrogenase activity humidity, temperature, pH value IntroducciónExisten diversos parámetros considerados clave para determinar la calidad del suelo, aquellos de naturaleza física y físico-química (estabilidad de agregados, pH, conductividad eléctrica), química (parámetros nutricionales y fracciones de carbono), como del tipo microbiológico y bioquímico (carbono de biomasa microbiana, respiración microbiana o diversas actividades enzimáticas). El componente microbiológico puede servir como indicador del estado general del suelo, pues una buena actividad microbiana en suelo es reflejo de condiciones físi...

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Organic and inorganic soil phosphates and acid phosphatase activity in the rhizosphere of 80-year-old Norway spruce [Picea abies (L.) Karst.] trees

Cited by 145 publications

References 20 publications

Rhizospheric P and K in forest soil manipulated with ammonium sulfate and water

Rhizospheric P and K in forest soil manipulated with ammonium sulfate and water

A conceptual model for nutrient availability in the mineral soil-root system

Efecto De La Humedad, Temperatura Y Ph Del Suelo en La Actividad Microbiana a Nivel De Laboratorio

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