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Influence of long-term fertilization on soil enzyme activities

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Author(s): Alina Dora SAMUEL

Journal: Analele Universitatii din Oradea, Fascicula Biologie
ISSN 1224-5119

Volume: TOM XVI;
Issue: 1;
Start page: 113;
Date: 2009;
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Keywords: catalase | dehydrogenase | green manure | phosphatase | soil

ABSTRACT
Soil enzyme activities (actual and potential dehydrogenase, catalase, acid and alkaline phosphatase) were determined in the 0–10, 10–20, and 20–30 cm layers of a brown luvic soil submitted to a complex fertilization experiment with different types of green manure. It was found that each activity decreased with increasing sampling depth. It should be emphasized that greenmanuring of maize led to a significant increase in each of the five enzymatic activities determined. The enzymatic indicators of soil quality calculated from the values of enzymatic activities showed the order: lupinus + rape + oat > lupinus > vetch + oat + ryegrass > lupinus + oat + vetch > unfertilized plot. This order means that by determination of enzymatic activities valuable information can be obtained regarding fertility status of soils. There were significant correlations of soil enzyme activities with chemical properties.
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