Open AccessMicrobial nitrification, denitrification and respiration in the leached cinnamon soil of the upper basin of Miyun Reservoir
Author(s) -
Wen Xu,
Yanpeng Cai,
Yang Zhang,
Xia Yin,
Qian Tan
Publication year - 2017
Publication title -
scientific reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.24
H-Index - 213
ISSN - 2045-2322
DOI - 10.1038/srep42032
Subject(s) - nitrification , denitrification , soil respiration , environmental chemistry , nitrogen , respiration , chemistry , simultaneous nitrification denitrification , environmental science , zoology , soil water , soil science , botany , biology , organic chemistry
Leached cinnamon soil is the main agricultural soil distributed in the North China Plain. In this research, leached cinnamon soil samples were collected in the upper basin of Miyun Reservoir (northeast of Beijing, China). The BaPS method (Barometric Process Separation) was applied to measure nitrification, denitrification and respiration rates. The rates of nitrification, denitrification and respiration were 0–120.35 μg N/kg SDW h, 0–246.86 μg N/kg SDW h and 0.17–225.85 μg C/kg SDW h (Soil Dry Weight, SDW), respectively. The emission rates of CO 2 and N x O y through nitrification, denitrification and respiration were 1.00–547.80 and 6.00–4850.65 μmol/h, respectively. The analysis of relationships between nitrification, denitrification and respiration rates indicated that these three microbial processes were interacted, which posed impacts on soil nitrogen availability. As indicated by the results, C:N ratio coupled withcontent could be taken as the indicators ofcontent, which is usually the predominant form of N available to plants growing in soil. Results showed thatcontent was the highest (i.e., >62.4 mg/kg) when C:N ratio was 5.30–8.40, meanwhilecontent was 3.71–4.39 mg/kg. Nevertheless,content was the lowest (i.e., <6.40 mg/kg) when C:N ratio was 9.2–12.10, meanwhilecontent was 3.41–4.35 mg/kg.