ISSN:
1573-5036
Keywords:
Cellulase
;
Compound fertilizer
;
Cupric sulfate
;
CO2-evolution
;
Dehydrogenase
;
Invertase
;
Soil enzymes
;
Urease
;
Xylanase
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary 1. Compound fertilization inhibits the enzymatic activities of the hydrolytic decomposition of litter. 2. In the nursery soil examined urease and xylanase activities had been distinctly reduced after six weeks, whereas cellulase and invertase activities had scarcely been affected after this period. 3. Through compound fertilization the enzymatic activities of intracellular dehydrogenases increased by the same amount as the microbial biomass. 4. It was proved that, in the case of litter decomposition, extracellular biochemical activity was not at all bound to be in direct relation to the microbial biomass, but that it is closely connected to the decomposible organic matter. 5. An additional treatment of the soil with cupric sulfate brought a toxic effect. Dehydrogenase activity was inhibited by a further 72%, urease and xylanase activities by 30%. Invertase activity was only reduced by 15% and cellulase activity by 10%. 6. The present studies make it possible to understand the complicated interaction between soil microorganisms and the plant, point to the inhibition of litter decomposition by chemical soil treatments (fertilization, addition of a heavy metal) and suggest the competition for nutrients between the plant and the soil microflora. 7. A new method for the determination of invertase activity in soils was developed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02139644
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