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A number of biochemical parameters reflecting biological activity (respiration, ATP, enzyme activities) were determined in 0- to 7-year-old lignite mine soils. C (as CO2) and ATP contents and hydrolytic enzyme activities all increased with soil age. The kinetics of CO2 release showed that both labile and recalcitrant C-bearing substrates were mineralized,(More)
Soil biological and biochemical properties are highly sensitive to environmental stress and thus can be used to assess quality. Any soil quality index should include several biological and biochemical variables so as to reflect better the complex processes affecting soil quality and to compensate for the wide variations occurring in individual properties.(More)
 The native soils of Galicia (NW Spain) exhibit a biochemical equilibrium such that total soil N is a function of five biochemical and microbiological parameters: microbial biomass C, mineralized N, phosphomonoesterase, β-glucosidase and urease activities. To investigate whether the ratio of the total N calculated from biochemical soil properties (Nc) and(More)
The incorporation of biosolids to soil is a strategy aiming at the re-location of these materials in the environment with a useful end: soil fertilization. In this work, the response of two Argiudoll soils (one with more than 100 years of agriculture and the other, a virgin one) to biosolid incorporation was studied under laboratory conditions. To measure(More)
Soil response to contamination with 2,4,5-triclorophenol was studied to test the validity of the concept of Generic Reference Levels (GRL), the main criterion used to define soil contamination. Soil samples were artificially contaminated with doses between 0 and 5000 mg kg(-1) of 2,4,5-triclorophenol, and analysed by various tests. Where possible, the(More)
In this study, the effects of different management practices on soil biochemical properties were evaluated in three pairs of grassland soils (unmanaged and managed) located in three areas of Galicia (NW Spain) where different types of climate prevail. Variations in soil biochemical properties were monitored throughout 1 year. Changes in soil temperature,(More)
Although soil biochemical properties are considered to be good indicators of changes in soil quality, few studies have been made of the changes in biochemical properties brought about by anthropogenic disturbance of grassland ecosystems. In the present study, several biochemical properties were analysed in 31 grassland soils subjected to a high level of(More)
Biochemical properties are at present considered to be the best indicators for assessing soil quality, but their use is limited by the lack of available data, at least for certain ecosystems. In an attempt to offset this lack of data, the present study provides information on different biochemical properties of soils from Sierra Nevada and Sierra María(More)
Samples of an Ah horizon from a Cambisol under oakwood vegetation were artificially contaminated with diesel (at doses of 20, 40, 80, 160 and 400 microl g(-1)) under laboratory conditions. The presence of the contaminant caused a decrease in the microbial biomass and in phosphomonoesterase, beta-glucosidase and particularly, urease activities. In contrast,(More)
The objective of the present study was to verify whether the generic reference levels (GRL) for soils contaminated with 2,4-dichlorophenol (2,4 DCP), established by Spanish legislation and published in the Real Decreto 9/2005, are accurate for Galician soils. For this, the surface horizons of seven soils under different types of land use were experimentally(More)