Microbial biomass phosphorus in soils of beech (Fagus sylvatica L.) forests

Joergensen, Rainer Georg; Kübler, Helga; Meyer, B.; Wolters, Volkmar

doi:10.1007/bf00336162

Cited by 114 publications

(71 citation statements)

References 16 publications

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“…Microbial biomass C, N and P were determined by the fumigation-extraction method (Brookes et al, 1982;Brookes et al, 1985;Vance et al, 1987;Joergensen et al,1995). The organic C in the soil extracts was measured using an automated total organic C (TOC) analyzer; microbial biomass C was calculated by using a k EC value of 0.45 (Wu et al, 1990).…”

Section: Soil Analysismentioning

confidence: 99%

Microbial biomass, nutrient availability and nutrient uptake by wheat in two soils with organic amendments

Malik

Khan

Marschner

et al. 2013

J. Soil Sci. Plant Nutr.

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A 72-day greenhouse pot experiment was conducted with a sandy loam or a silt loam soil to examine the effects of farmyard manure (FYM), poultry litter (PL) and biogenic waste compost (BWC) at 10 g dw kg -1 soil on microbial biomass and activity and growth and nutrient uptake by wheat. Soil samples were collected at days 0, 14, 28, 42, 56 and 72 after planting. Growth and nutrient uptake by wheat were determined on day 72. All three amendments increased microbial biomass C, N and P, dehydrogenase activity, plant growth and nutrient uptake with a greater effect by FYM and PL than by BWC. All amendments increased microbial biomass C, N and P and enzyme activity particularly on day 0. These microbial parameters decreased after day 0 indicating microbial biomass turnover. All amendments increased plant growth and nutrient uptake. It is concluded that organicamendments can stimulate microbial growth and nutrient uptake as well as plant growth and nutrient uptake. Microbes can increase plant nutrient availability by nutrient mobilisation but also because nutrients taken up by the microbial biomass initially could become available to plants when the microbial biomass turns over as the easily available C is depleted.

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Section: Soil Analysismentioning

confidence: 99%

Microbial biomass, nutrient availability and nutrient uptake by wheat in two soils with organic amendments

Malik

Khan

Marschner

et al. 2013

J. Soil Sci. Plant Nutr.

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“…In the inter row space, a higher microbial C:P ratio was also observed with L. leucocephala cultivation. The range of microbial biomass C:P ratios is quite wide from 5.0 to 276 (Joergensen et al 1995;He et al, 1997) in different climates, soil management systems and analytical procedures. However, under Brazilian tropical/subtropical conditions, the microbial biomass C:P ratio has been shown to vary from 14 to 45 (Balota et al 2003;Duda et al,.…”

Section: Microbial Biomass Ratiomentioning

confidence: 99%

Microbial activity in soil cultivated with different summer legumes in coffee crop

Balota

Chaves

2011

Braz. arch. biol. technol.

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“…The difference between extractable P in the two samples is an estimate of Pm. A recovery factor (Kp) is often used to improve the accuracy of Pm estimates (Joergensen et al 1995).…”

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confidence: 99%

“…Chloroform is often used to lyse microbial cells in soil (Joergensen et al 1995, Selles et al 1995. McLaughlin et al (1986) found that hexanol is just as effective as chloroform and is safer because chloroform is a suspected carcinogen.…”

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confidence: 99%

“…McLaughlin et al (1986) found that hexanol is just as effective as chloroform and is safer because chloroform is a suspected carcinogen. A solution of 0.5M NaHCO 3 is most often used for extracting Pm from soil biomass (Potter et al 1991, Joergensen et al 1995. When comparing various extractants in soil biomass studies, Brookes et al (1982) reported that 0.5M NaHCO 3 adjusted to pH 8.5 was the most satisfactory.…”

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confidence: 99%

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Evaluation of effect of different sterilization methods on soil biomass phosphorus extracted with NaHCO3

Sinegani¹,

Hosseinpur²

2010

PLANT SOIL ENVIRON

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Soil microbial biomass is a dynamic force driving soil phosphorus cycling in soils. The temperature, time and method for killing soil organisms in soil biomass P determination are so important factors that affect the results. The aim of this study was to compare some methods of soil sterilization and soil microbial P (Pm) release in extraction with NaHCO 3 . Five samples of calcareous soils in three replicates were incubated in field capacity and 28°C. The texture of soils differed from loamy sand to sandy loam. They had 10-15% equivalent calcium carbonate, 1-3% organic carbon and 40-90 mg/kg available P content. After 1, 10, 30, and 50 days of incubation a portion of each soil was sterilized by five methods (chloroform fumigation, autoclaving at 121°C for 0.5 h, oven drying at 70°C for 48 h, oven drying at 180°C for 2 h, and ultrasonification). Phosphorus of the sterilized and control soils were extracted with 0.5M NaHCO 3 (pH 8.5) and determined spectrophotometrically as blue molybdate-phosphate complexes under partial reduction with ascorbic acid. Results showed that the method of soil sterilization and soil type had significant effects on biomass P estimated in soils (P < 0.01). There were no significant differences between extracted biomass P at chloroform fumigation, autoclaving at 121°C for 0.5 h, and oven drying at 70°C for 48 h. However biomass P was significantly more extracted from soil by oven drying at 180°C for 2 h and by ultrasonification. Fixation of Pm in soil during the extraction period can reduce the precision of biomass P estimates. This effect was more obvious in biomass P determination by fumigation and oven drying at 70°C for 48 h. Biomass P determined by these methods and autoclaving had positive and significant correlations with soil sand contents, respectively due to long sterilization period and temperature. Ultrasonification released more P from these calcareous soils especially at the start of soil incubation. It released higher microbial P and reduced P sorption in soils; biomass P determined by this method compared to other methods had relatively higher correlations with fungi, glumales spore and P solubilizing bacteria numbers in soil.

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Microbial biomass phosphorus in soils of beech (Fagus sylvatica L.) forests

Cited by 114 publications

References 16 publications

Microbial biomass, nutrient availability and nutrient uptake by wheat in two soils with organic amendments

Microbial biomass, nutrient availability and nutrient uptake by wheat in two soils with organic amendments

Microbial activity in soil cultivated with different summer legumes in coffee crop

Evaluation of effect of different sterilization methods on soil biomass phosphorus extracted with NaHCO3

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