Microfungi in coniferous forest soils treated with lime or wood ash

1993 ◽  
Vol 15 (2) ◽  
pp. 91-95 ◽  
Author(s):  
E. B��th ◽  
K. Arnebrant
1985 ◽  
Vol 31 (3) ◽  
pp. 190-197 ◽  
Author(s):  
Pertti J. Martikainen ◽  
Eeva-Liisa Nurmiaho-Lassila

Among ammonium-oxidizing autotrophic nitrifiers only Nitrosospira was found in two pine forest soils fertilized with urea or wood ash in southern Finland. A strain isolated from an ash-treated soil was partially characterized. The cells were spirals, mostly of one to three turns; they were either flagellated or not and pili were found. The strain grew best at 20–27 °C at Po2 of 0.21 (shortest doubling time, 29 h). Km(O2) at 27 °C was 0.20 mg/L. Activity per cell during exponential growth ranged from 0.0060 to 0.0085 pmol [Formula: see text] and growth yield from 2.53 × 106 to 3.60 × 106 cells/μmol [Formula: see text]. Pure cultures could not be isolated from urea-fertilized soils. Hyphomicrobium- and seliberia-like bacteria were frequent contaminants of enrichment cultures in these soils. Reasons for the persistence of Nitrosospira in forest soil were discussed.


1990 ◽  
Vol 128 (1) ◽  
pp. 31-44 ◽  
Author(s):  
K. Killham

2015 ◽  
Vol 10 (2) ◽  
pp. 363-375 ◽  
Author(s):  
Hilary T C Leung ◽  
Kendra R Maas ◽  
Roland C Wilhelm ◽  
William W Mohn

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