The response of ammonia-oxidizer activity and community structure to fertilizer amendment of orchard soils

Soil microorganisms have a significant role in determining the relative loss and retention of plant available nitrogen (N) and thus relative efficiency in the use of fertility inputs to agricultural production systems. Although the effect of management system on activity of the N-cycling microbial c...

Full description

Saved in:
Bibliographic Details
Published in:Soil biology & biochemistry 2014-01, Vol.68, p.410-418
Main Authors: Strauss, S.L., Reardon, C.L., Mazzola, M.
Format: Article
Language:English
Subjects:
Agricultural soil
Agronomy. Soil science and plant productions
Ammonia-oxidizing archaea
Ammonia-oxidizing bacteria
Archaea
Biochemistry and biology
Biological and medical sciences
Brassica napus
Chemical, physicochemical, biochemical and biological properties
Fertility management
Fundamental and applied biological sciences. Psychology
General agronomy. Plant production
Malus
N cycling
Orchards
Other nutrients. Amendments. Solid and liquid wastes. Sludges and slurries
Physics, chemistry, biochemistry and biology of agricultural and forest soils
Soil science
Soil-plant relationships. Soil fertility. Fertilization. Amendments
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Soil microorganisms have a significant role in determining the relative loss and retention of plant available nitrogen (N) and thus relative efficiency in the use of fertility inputs to agricultural production systems. Although the effect of management system on activity of the N-cycling microbial communities has been evaluated in certain annual cropping systems, results have been variable and there have been few studies conducted in perennial crops, such as apple. We examined the effect of organic and mineral fertility inputs to organic and conventional orchard soils on the overall activity, abundance and diversity of ammonia-oxidizing bacteria and archaea. Apple rootstocks were cultivated in orchard soils receiving one of five fertility treatments: Brassica napus seed meal, plant-based compost, urea, urea with plant-based compost, and a no-treatment control. Based on analysis of the ammonia monooxygenase gene (amoA), ammonia-oxidizing archaea (AOA) were more abundant than ammonia-oxidizing bacteria (AOB) in both untreated conventionally and organically managed orchard soils. However, AOB abundance was significantly different in both organically and conventionally managed soils with fertilizer amendments. The microbial community of the conventional orchard soil appeared to be limited by inorganic N since a response in potential activity to N input was only observed in treatments with urea. In the organic orchard soil, an increase in AOB gene abundance was detected only in response to the urea plus compost fertility treatment. Soil management and fertilizer additions had little effect on AOA gene abundance compared to the no-treatment control. Although composition of the AOB community was similar between the conventional and organically managed soils, AOA communities were significantly different. The different responses of the bacterial and archaeal ammonia-oxidizer communities to organic and conventional management and fertilizer amendments highlight the need for an increased focus in agricultural research to understand and improve the specificity of fertilizer application for orchard production systems. •Ammonia-oxidizing archaea (AOA) more abundant than bacteria (AOB) in all orchard soils.•AOB, not AOA, responded to fertilizer amendments in both orchard soil types.•AOA, but not AOB, community composition differed significantly among orchard soils.
ISSN:0038-0717
1879-3428
DOI:10.1016/j.soilbio.2013.10.016