Atmospheric ammonia concentration modulates soil enzyme and microbial activity in an oak forest affecting soil microbial biomass

A - Papers appearing in refereed journals

Lopez-Aizpun, M., Arango-Mora, C., Santamaria, C., Lasheras, E., Santamaria, J. M., Ciganda, V. S., Cardenas, L. M. and Elustondo, D. 2018. Atmospheric ammonia concentration modulates soil enzyme and microbial activity in an oak forest affecting soil microbial biomass. Soil Biology and Biochemistry. 116, pp. 378-387.

AuthorsLopez-Aizpun, M., Arango-Mora, C., Santamaria, C., Lasheras, E., Santamaria, J. M., Ciganda, V. S., Cardenas, L. M. and Elustondo, D.
Abstract

The present work was carried out to assess the effect of atmospheric ammonia (NH3) on soil physicochemical
properties, soil enzymatic activities (β-glucosidase -β-GLU-, nitrate reductase –NR-, urease –UR-, protease –PRO-,acid phosphatase –PHO-, dehydrogenase –DHA-), soil microbial biomass and soil respiration. The study was conducted along a NH3 gradient in a Q. pubescens Milld. forest in the vicinity of two livestock farms. Because of NHy (NHy: NH3 and NH4+) deposition, N saturation was detected up to 330 m from the farms. This excess of N led to a decrease in soil C:N and an increase in soil nitrification processes, which resulted in an accumulation of the heavy N isotope (15N) in the soil. N saturation was also reflected in the activity of NR enzyme, which was inhibited. On the other hand, while UR enzyme was inhibited close to the farms possibly due to the high amount of N-NH4+ resulting from the hydrolysis of NH3, PRO activity was stimulated by the presence of organic nitrogen compounds and the need of soil organisms to meet the C demand. In addition, the activity of PHO and β-GLU enzymes was regulated by the relative amount of C and P that organisms need. Regarding biological variables,enhanced NH3 reduced soil microbial biomass and biomass respiratory efficiency. Finally, soil enzyme activities and soil microbial biomass have proved to be good biological indicators of soil quality

KeywordsAtmospheric ammonia; Soil extracellular enzymes; Soil respiration; Soil microbial biomass; Metabolic quotient
Year of Publication2018
JournalSoil Biology and Biochemistry
Journal citation116, pp. 378-387
Digital Object Identifier (DOI)doi:10.1016/j.soilbio.2017.10.020
Open accessPublished as non-open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeS2N - Soil to Nutrition - Work package 2 (WP2) - Adaptive management systems for improved efficiency and nutritional quality
Output statusPublished
Publication dates
Online07 Nov 2017
Publication process dates
Accepted21 Oct 2017
Copyright licensePublisher copyright
PublisherElsevier
ISSN0038-0717

Permalink - https://repository.rothamsted.ac.uk/item/84vq0/atmospheric-ammonia-concentration-modulates-soil-enzyme-and-microbial-activity-in-an-oak-forest-affecting-soil-microbial-biomass

Restricted files

Publisher's version

Under embargo indefinitely

18 total views
18 total downloads
0 views this month
0 downloads this month