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Distribution of nitrifiers and nitrification associated with different sizes of aggregates along a 2000 year chronosequence of rice cultivation

Auteur(s) et Affiliation(s)

XIN, X.
College of Resources and Environment, Southwest Univ., Chongqing, Chine
LIU, Q.
Inst. of Soil Science, CAS, Nanjing, Chine
LIU, W.
College of Resources and Environment, Southwest Univ., Chongqing, Chine
JIANG, X.
College of Resources and Environment, Southwest Univ., Chongqing, Chine
WRIGHT, A.L.
Everglades Research and Education Center, Univ. of Florida, Belle Glade, Etats-Unis


Description :
Soil aggregation, distribution patterns of ammonia-oxidizing bacteria (AOB) and ammonia oxidizing archaea (AOA) associated with different sizes of aggregates, and nitrification were studied for sites, located in Cixi, Zhejiang Province, under a 300 and 2000 year duration of rice cultivation (P300 and P2000). Long-term rice cultivation improved large macroaggregate formation from silt + clay fractions. The highest net nitrification occurred for macroaggregates and the least for large macroaggregates, which coincided with nitrifier populations. A long duration of intensive rice cultivation history depressed nitrifier populations and nitrification rates at both whole soil scale and aggregate scale.


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2014, n°. 119, p. 71-77, nombre de pages : 7, Références bibliographiques : 1 p.

Date :
2014

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais
Droits :
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