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This digital document is a journal article from Soil Biology and Biochemistry, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.Description: Techniques developed to measure microbial biomass in mineral soils may not give reliable results in humus. We evaluated the relationships between three techniques to estimate microbial biomass in forest humus: chloroform fumigation-extraction (CFE), total extractable phospholipid fatty acids (PLFA), and extractable DNA. There was a good relationship between PLFA and CFE (R^2=0.96), with a slope slightly different from that previously reported for mineral soils (1nmol PLFA corresponded to a flush of 3.2 @mg C released by fumigation in humus cf. 2.4 @mg C in mineral soil). There was no relationship between DNA concentration and the other two measurements of microbial biomass. This may be due, in part, to the high
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Posted in Garden Soil | 
acid,, biomass, chloroform, Comparison, determine, fatty, fumigation-extraction,, Methods, microbial, phospholipid | 
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This digital document is a journal article from Forest Ecology and Management, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.Description: This study focuses on the relationships between forest dynamics and changes in humus forms and animal communities in three areas of spruce forest at two developmental phases: two areas with 24-year-old trees (mean age) and one area with 136-year-old trees located in the Italian Alps. Mesofauna and macroarthropods were identified at the level of zoological group, order, super-family or family, when possible. They were then classified into morphotypes on the basis of features observable under a magnifying glass. The humus form varied from amphimull to dysmull in the 24-year-old spruce stands (regeneration), and was a dysmoder under the 136-year-old trees (adult). Results of correspondence analysis and ANOVA
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Posted in Garden Soil | Animal, Changes, communities, developmental, forms, humus, Norway, phases, soil, spruce | Leave a comment
This digital document is a journal article from Applied Soil Ecology, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.Description: An increasing amount of evidence shows the context dependent nature of various biotic interactions across terrestrial and aquatic ecosystems. We established a laboratory experiment to study whether the effects of Cognettia sphagnetorum (Enchytraeidae) and ectomycorrhizal fungi on Scots pine (Pinus sylvestris) seedling growth are influenced by wood ash application. Acidic coniferous forest soil was treated with wood ash at 5000kgha^-^1 or left as ash-free control and inoculated with soil saprotrophic microbes and nematodes. The microcosms were destructively sampled 26 and 51 weeks after initiation of the experiment. We measured enchytraeid and pine seedling biomass, abundance of nematodes and leaching of NH”4^+-N and
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Posted in Garden Soil | ectomycorrhizal, enchytraeid, fungi, Growth, humus, impacts, Plant, soil, Variable, worms | Leave a comment
