Mineralization and microbial immobilization of N and P in arctic soils in relation to season, temperature and nutrient amendment
In situ summer, winter and annual net N and P mineralization and microbial immobilization of mineralized nutrients were measured in a low-altitude subarctic/alpine dwarf shrub heath and in a high-altitude fellfield. Net mineralization was determined by using the buried-bag technique, which was combi...
Main Authors: | , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
1999
|
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.466.4779 http://www.bi.ku.dk/STAFF/andersm/Schmidt_et_al_1999.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.466.4779 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.466.4779 2023-05-15T15:00:41+02:00 Mineralization and microbial immobilization of N and P in arctic soils in relation to season, temperature and nutrient amendment Inger K. Schmidt Sven Jonasson Anders Michelsen The Pennsylvania State University CiteSeerX Archives 1999 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.466.4779 http://www.bi.ku.dk/STAFF/andersm/Schmidt_et_al_1999.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.466.4779 http://www.bi.ku.dk/STAFF/andersm/Schmidt_et_al_1999.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.bi.ku.dk/STAFF/andersm/Schmidt_et_al_1999.pdf Arctic soil Climate change Substrate quality Microbial nutrient uptake Mineralization text 1999 ftciteseerx 2016-01-08T06:57:04Z In situ summer, winter and annual net N and P mineralization and microbial immobilization of mineralized nutrients were measured in a low-altitude subarctic/alpine dwarf shrub heath and in a high-altitude fellfield. Net mineralization was determined by using the buried-bag technique, which was combined with fumigation–extraction to recover microbial nutrients and estimate microbial nutrient immobilization. The measurements were carried out in unperturbed plots and in plots, which had been subjected to elevated temperature and fertilizer addition for 5 years before the experiment started. During the growing season, the microbes in the unperturbed plots immobilized the major part of the mineralized nutrients, which resulted in low net mineralization. This occurred also during winter, when we assumed that nutrients should be released during microbial die-back. However, we found no evidence for a large microbial winter die-back and the surviving microbial biomass even immobilized extra nutrients. Soil temperature enhancement by ca. 28C in general increased, or tended to increase, net mineralization. However, there was not necessarily any strong correlation between net mineralization and temperature because temperature-induced increase in gross mineralized nutrients could either lead to nutrient immobilization in the microbes or the nutrients could be released to the soil inorganic pool. Fertilizer additions had no major effect on net nutrient mineralization or nutrient immobilization. However, the ligno-cellulose index, which has been used as a predictor of substrate quality and usually correlates negatively with decomposition rate, also appeared to be a good predictor of gross mineralization, but a poor predictor of net mineralization. # 1999 Elsevier Text Arctic Climate change Subarctic Unknown Arctic |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
topic |
Arctic soil Climate change Substrate quality Microbial nutrient uptake Mineralization |
spellingShingle |
Arctic soil Climate change Substrate quality Microbial nutrient uptake Mineralization Inger K. Schmidt Sven Jonasson Anders Michelsen Mineralization and microbial immobilization of N and P in arctic soils in relation to season, temperature and nutrient amendment |
topic_facet |
Arctic soil Climate change Substrate quality Microbial nutrient uptake Mineralization |
description |
In situ summer, winter and annual net N and P mineralization and microbial immobilization of mineralized nutrients were measured in a low-altitude subarctic/alpine dwarf shrub heath and in a high-altitude fellfield. Net mineralization was determined by using the buried-bag technique, which was combined with fumigation–extraction to recover microbial nutrients and estimate microbial nutrient immobilization. The measurements were carried out in unperturbed plots and in plots, which had been subjected to elevated temperature and fertilizer addition for 5 years before the experiment started. During the growing season, the microbes in the unperturbed plots immobilized the major part of the mineralized nutrients, which resulted in low net mineralization. This occurred also during winter, when we assumed that nutrients should be released during microbial die-back. However, we found no evidence for a large microbial winter die-back and the surviving microbial biomass even immobilized extra nutrients. Soil temperature enhancement by ca. 28C in general increased, or tended to increase, net mineralization. However, there was not necessarily any strong correlation between net mineralization and temperature because temperature-induced increase in gross mineralized nutrients could either lead to nutrient immobilization in the microbes or the nutrients could be released to the soil inorganic pool. Fertilizer additions had no major effect on net nutrient mineralization or nutrient immobilization. However, the ligno-cellulose index, which has been used as a predictor of substrate quality and usually correlates negatively with decomposition rate, also appeared to be a good predictor of gross mineralization, but a poor predictor of net mineralization. # 1999 Elsevier |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Inger K. Schmidt Sven Jonasson Anders Michelsen |
author_facet |
Inger K. Schmidt Sven Jonasson Anders Michelsen |
author_sort |
Inger K. Schmidt |
title |
Mineralization and microbial immobilization of N and P in arctic soils in relation to season, temperature and nutrient amendment |
title_short |
Mineralization and microbial immobilization of N and P in arctic soils in relation to season, temperature and nutrient amendment |
title_full |
Mineralization and microbial immobilization of N and P in arctic soils in relation to season, temperature and nutrient amendment |
title_fullStr |
Mineralization and microbial immobilization of N and P in arctic soils in relation to season, temperature and nutrient amendment |
title_full_unstemmed |
Mineralization and microbial immobilization of N and P in arctic soils in relation to season, temperature and nutrient amendment |
title_sort |
mineralization and microbial immobilization of n and p in arctic soils in relation to season, temperature and nutrient amendment |
publishDate |
1999 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.466.4779 http://www.bi.ku.dk/STAFF/andersm/Schmidt_et_al_1999.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Subarctic |
genre_facet |
Arctic Climate change Subarctic |
op_source |
http://www.bi.ku.dk/STAFF/andersm/Schmidt_et_al_1999.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.466.4779 http://www.bi.ku.dk/STAFF/andersm/Schmidt_et_al_1999.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766332764828729344 |