C and N availability affects the 15N natural abundance of the soil microbial biomass across a cattle manure gradient

Paul Dijkstra, O. V. Menyailo, R. R. Doucett, S. C. Hart, Egbert Schwartz, Bruce A Hungate

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

The availability of C and N to the soil microbial biomass is an important determinant of the rates of soil N transformations. Here, we present evidence that changes in C and N availability affect the 15N natural abundance of the microbial biomass relative to other soil N pools. We analysed the 15N natural abundance signature of the chloroform-labile, extractable, NO3-, NH4+ and soil total N pools across a cattle manure gradient associated with a water reservoir in semiarid, high-desert grassland. High levels of C and N in soil total, extractable, NO3-, NH4+ and chloroform-labile fractions were found close to the reservoir. The δ15N value of chloroform-labile N was similar to that of extractable (organic + inorganic) N and NO3- at greater C availability close to the reservoir, but was 15N-enriched relative to these N-pools at lesser C availability farther away. Possible mechanisms for this variable 15N-enrichment include isotope fractionation during N assimilation and dissimilation, and changes in substrate use from a less to a more 15N-enriched substrate with decreasing C availability.

Original languageEnglish (US)
Pages (from-to)468-475
Number of pages8
JournalEuropean Journal of Soil Science
Volume57
Issue number4
DOIs
StatePublished - Aug 2006

Fingerprint

cattle manure
microbial biomass
cattle
manure
chloroform
biomass
soil
isotope fractionation
substrate
water reservoirs
deserts
fractionation
desert
grasslands
grassland
isotope

ASJC Scopus subject areas

  • Soil Science
  • Earth-Surface Processes

Cite this

C and N availability affects the 15N natural abundance of the soil microbial biomass across a cattle manure gradient. / Dijkstra, Paul; Menyailo, O. V.; Doucett, R. R.; Hart, S. C.; Schwartz, Egbert; Hungate, Bruce A.

In: European Journal of Soil Science, Vol. 57, No. 4, 08.2006, p. 468-475.

Research output: Contribution to journalArticle

@article{ea87b4db31134f49b590f76246e1ed2e,
title = "C and N availability affects the 15N natural abundance of the soil microbial biomass across a cattle manure gradient",
abstract = "The availability of C and N to the soil microbial biomass is an important determinant of the rates of soil N transformations. Here, we present evidence that changes in C and N availability affect the 15N natural abundance of the microbial biomass relative to other soil N pools. We analysed the 15N natural abundance signature of the chloroform-labile, extractable, NO3-, NH4+ and soil total N pools across a cattle manure gradient associated with a water reservoir in semiarid, high-desert grassland. High levels of C and N in soil total, extractable, NO3-, NH4+ and chloroform-labile fractions were found close to the reservoir. The δ15N value of chloroform-labile N was similar to that of extractable (organic + inorganic) N and NO3- at greater C availability close to the reservoir, but was 15N-enriched relative to these N-pools at lesser C availability farther away. Possible mechanisms for this variable 15N-enrichment include isotope fractionation during N assimilation and dissimilation, and changes in substrate use from a less to a more 15N-enriched substrate with decreasing C availability.",
author = "Paul Dijkstra and Menyailo, {O. V.} and Doucett, {R. R.} and Hart, {S. C.} and Egbert Schwartz and Hungate, {Bruce A}",
year = "2006",
month = "8",
doi = "10.1111/j.1365-2389.2006.00793.x",
language = "English (US)",
volume = "57",
pages = "468--475",
journal = "Journal of Soil Sciences",
issn = "0022-4588",
publisher = "Wiley-Blackwell",
number = "4",

}

TY - JOUR

T1 - C and N availability affects the 15N natural abundance of the soil microbial biomass across a cattle manure gradient

AU - Dijkstra, Paul

AU - Menyailo, O. V.

AU - Doucett, R. R.

AU - Hart, S. C.

AU - Schwartz, Egbert

AU - Hungate, Bruce A

PY - 2006/8

Y1 - 2006/8

N2 - The availability of C and N to the soil microbial biomass is an important determinant of the rates of soil N transformations. Here, we present evidence that changes in C and N availability affect the 15N natural abundance of the microbial biomass relative to other soil N pools. We analysed the 15N natural abundance signature of the chloroform-labile, extractable, NO3-, NH4+ and soil total N pools across a cattle manure gradient associated with a water reservoir in semiarid, high-desert grassland. High levels of C and N in soil total, extractable, NO3-, NH4+ and chloroform-labile fractions were found close to the reservoir. The δ15N value of chloroform-labile N was similar to that of extractable (organic + inorganic) N and NO3- at greater C availability close to the reservoir, but was 15N-enriched relative to these N-pools at lesser C availability farther away. Possible mechanisms for this variable 15N-enrichment include isotope fractionation during N assimilation and dissimilation, and changes in substrate use from a less to a more 15N-enriched substrate with decreasing C availability.

AB - The availability of C and N to the soil microbial biomass is an important determinant of the rates of soil N transformations. Here, we present evidence that changes in C and N availability affect the 15N natural abundance of the microbial biomass relative to other soil N pools. We analysed the 15N natural abundance signature of the chloroform-labile, extractable, NO3-, NH4+ and soil total N pools across a cattle manure gradient associated with a water reservoir in semiarid, high-desert grassland. High levels of C and N in soil total, extractable, NO3-, NH4+ and chloroform-labile fractions were found close to the reservoir. The δ15N value of chloroform-labile N was similar to that of extractable (organic + inorganic) N and NO3- at greater C availability close to the reservoir, but was 15N-enriched relative to these N-pools at lesser C availability farther away. Possible mechanisms for this variable 15N-enrichment include isotope fractionation during N assimilation and dissimilation, and changes in substrate use from a less to a more 15N-enriched substrate with decreasing C availability.

UR - http://www.scopus.com/inward/record.url?scp=33745678952&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33745678952&partnerID=8YFLogxK

U2 - 10.1111/j.1365-2389.2006.00793.x

DO - 10.1111/j.1365-2389.2006.00793.x

M3 - Article

VL - 57

SP - 468

EP - 475

JO - Journal of Soil Sciences

JF - Journal of Soil Sciences

SN - 0022-4588

IS - 4

ER -