Results 261 to 270 of about 204,757 (304)

Soil microbial biomass and its controls

Journal of Forestry Research, 2005
Microbial biomass represents a relatively small standing stock of nutrients, compared to soil organic matter, but it can act as a labile source of nutrients for plants, a pathway for incorporation of organic matter into the soil, and a temporary sink for nutrients. This review describes several factors controlling the dynamics of soil microbial biomass.
Zhang Jiang-shan, Guo Jian-fen, Chen Guang-shui, Qian Wei   +3 more
openaire   +1 more source

Evaluation of soil microbial biomass methodology

Toxicological & Environmental Chemistry, 1991
Six methods, used for the determination of soil microbial biomass/activity, were assessed for their sensitivity to distinguish between four varying soils. Of the methods assessed, substrate‐induced respiration (SIR) demonstrated the greatest degree of sensitivity in detecting differences in microbial biomass/activity between the four soils.
S.C. Hulm, D.L. Castle, K. Cook, A. Self, M. Wood   +4 more
openaire   +1 more source

Soil microbial biomass—Interpretation and consideration for soil monitoring

Soil Research, 2011
Since 1970, measurement of the soil microbial biomass (SMB) has been widely adopted as a relatively simple means of assessing the impact of environmental and anthropogenic change on soil microorganisms. The SMB is living and dynamic, and its activity is responsible for the regulation of organic matter transformations and associated energy and nutrient ...
Gonzalez-Quinones V, Stockdale EA, Banning NC, Hoyle FC, Sawada Y, Wherrett AD, Jones DL, Murphy DV   +7 more
openaire   +2 more sources

Soil microbial biomass estimates in soils contaminated with metals

Soil Biology and Biochemistry, 1986
Abstract The validity of the chloroform fumigation-incubation procedure for measuring soil microbial biomass in field soils contaminated with metals (e.g. Cu, Ni, Zn, Cd) was assessed. The metal contamination was the result of past sewage sludge additions and the contaminated field soils now contain metals at about current maximum U.K.
P BROOKES, C HEIJNEN, S MCGRATH, E VANCE
openaire   +1 more source

MICROBIAL BIOMASS MEASUREMENT IN ACIDIC SOIL

Soil Science, 1991
The chloroform fumigation-incubation method for estimating soil microbial biomass is applicable to most soils; but, problems are associated with its use with extremely acidic soils and with soils amended with carbonaceous substrates. To evaluate the basis for these difficulties, this project was commenced with the objectives of (a) evaluating the ...
openaire   +1 more source

Arylsulfatase Activity of Microbial Biomass in Soils

Soil Science Society of America Journal, 1999
Abstract Quantification of the different pools of enzyme activity in soils (intra‐ and extracellular) is desired to assess the contribution of the microbial community to specific enzyme reactions and ecological changes in soils.
Susanne Klose, M. A. Tabatabai
openaire   +1 more source

Ergosterol and microbial biomass relationship in soil

Biology and Fertility of Soils, 1996
Ergosterol and microbial biomass C were measured in 26 arable, 16 grassland and 30 forest soils. The ergosterol content ranged from 0.75 to 12.94 μg g-1 soil. The geometric mean ergosterol content of grassland and forest soils was around 5.5 μg g-1, that of the arable soils 2.14 μg g-1.
G. Djajakirana, R. G. Joergensen, B. Meyer   +2 more
openaire   +1 more source

Quantifying microbial biomass phosphorus in acid soils

Biology and Fertility of Soils, 2000
This study aimed to validate the fumigation-extraction method for measuring microbial biomass P in acid soils. Extractions with the Olsen (0.5 M NaHCO3, pH 8.5) and Bray-1 (0.03 M NH4F–0.025 M HCl) extractants at two soil:solution ratios (1 : 20 and 1 : 4, w/v) were compared using eight acid soils (pH 3.6–5.9).
J. Wu, Z.-L. He, W.-X. Wei, A. G. O'Donnell, J. K. Syers   +4 more
openaire   +2 more sources

Influence of macroclimate on soil microbial biomass

Soil Biology and Biochemistry, 1989
Soils from 12 agricultural long-term experimental fields located in contrasting climatic regions were used to assess the influence of macroclimate on soil microbial biomass (Cmicr). Cmicr was measured using the substrate-induced respiration technique.
H. Insam, D. Parkinson, K.H. Domsch
openaire   +1 more source

Microbial necromass ≠ microbial biomass: Microbial death pathways affect soil organic carbon sequestration

2023
The last two decades soil organic matter research developed rapidly, uncovering a central role of soil microorganisms in the sequestration and storage of soil organic carbon (C), especially through accumulation of their necromass. However, despite strong evidence that the so-called soil microbial carbon pump is an important process, the direct ...
Tessa Camenzind, Kyle Mason-Jones, India Mansour, Matthias C. Rillig, Johannes Lehmann   +4 more
openaire   +1 more source