Cargando…

Soil Biochemical Responses to Nitrogen Addition in a Bamboo Forest

Many vital ecosystem processes take place in the soils and are greatly affected by the increasing active nitrogen (N) deposition observed globally. Nitrogen deposition generally affects ecosystem processes through the changes in soil biochemical properties such as soil nutrient availability, microbi...

Descripción completa

Detalles Bibliográficos
Autores principales: Tu, Li-hua, Chen, Gang, Peng, Yong, Hu, Hong-ling, Hu, Ting-xing, Zhang, Jian, Li, Xian-wei, Liu, Li, Tang, Yi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4100878/
https://www.ncbi.nlm.nih.gov/pubmed/25029346
http://dx.doi.org/10.1371/journal.pone.0102315
_version_ 1782326730534420480
author Tu, Li-hua
Chen, Gang
Peng, Yong
Hu, Hong-ling
Hu, Ting-xing
Zhang, Jian
Li, Xian-wei
Liu, Li
Tang, Yi
author_facet Tu, Li-hua
Chen, Gang
Peng, Yong
Hu, Hong-ling
Hu, Ting-xing
Zhang, Jian
Li, Xian-wei
Liu, Li
Tang, Yi
author_sort Tu, Li-hua
collection PubMed
description Many vital ecosystem processes take place in the soils and are greatly affected by the increasing active nitrogen (N) deposition observed globally. Nitrogen deposition generally affects ecosystem processes through the changes in soil biochemical properties such as soil nutrient availability, microbial properties and enzyme activities. In order to evaluate the soil biochemical responses to elevated atmospheric N deposition in bamboo forest ecosystems, a two-year field N addition experiment in a hybrid bamboo (Bambusa pervariabilis × Dendrocalamopsis daii) plantation was conducted. Four levels of N treatment were applied: (1) control (CK, without N added), (2) low-nitrogen (LN, 50 kg N ha(−1) year(−1)), (3) medium-nitrogen (MN, 150 kg N ha(−1) year(−1)), and (4) high-nitrogen (HN, 300 kg N ha(−1) year(−1)). Results indicated that N addition significantly increased the concentrations of NH(4) (+), NO(3) (−), microbial biomass carbon, microbial biomass N, the rates of nitrification and denitrification; significantly decreased soil pH and the concentration of available phosphorus, and had no effect on the total organic carbon and total N concentration in the 0–20 cm soil depth. Nitrogen addition significantly stimulated activities of hydrolytic enzyme that acquiring N (urease) and phosphorus (acid phosphatase) and depressed the oxidative enzymes (phenol oxidase, peroxidase and catalase) activities. Results suggest that (1) this bamboo forest ecosystem is moving towards being limited by P or co-limited by P under elevated N deposition, (2) the expected progressive increases in N deposition may have a potential important effect on forest litter decomposition due to the interaction of inorganic N and oxidative enzyme activities, in such bamboo forests under high levels of ambient N deposition.
format Online
Article
Text
id pubmed-4100878
institution National Center for Biotechnology Information
language English
publishDate 2014
publisher Public Library of Science
record_format MEDLINE/PubMed
spelling pubmed-41008782014-07-18 Soil Biochemical Responses to Nitrogen Addition in a Bamboo Forest Tu, Li-hua Chen, Gang Peng, Yong Hu, Hong-ling Hu, Ting-xing Zhang, Jian Li, Xian-wei Liu, Li Tang, Yi PLoS One Research Article Many vital ecosystem processes take place in the soils and are greatly affected by the increasing active nitrogen (N) deposition observed globally. Nitrogen deposition generally affects ecosystem processes through the changes in soil biochemical properties such as soil nutrient availability, microbial properties and enzyme activities. In order to evaluate the soil biochemical responses to elevated atmospheric N deposition in bamboo forest ecosystems, a two-year field N addition experiment in a hybrid bamboo (Bambusa pervariabilis × Dendrocalamopsis daii) plantation was conducted. Four levels of N treatment were applied: (1) control (CK, without N added), (2) low-nitrogen (LN, 50 kg N ha(−1) year(−1)), (3) medium-nitrogen (MN, 150 kg N ha(−1) year(−1)), and (4) high-nitrogen (HN, 300 kg N ha(−1) year(−1)). Results indicated that N addition significantly increased the concentrations of NH(4) (+), NO(3) (−), microbial biomass carbon, microbial biomass N, the rates of nitrification and denitrification; significantly decreased soil pH and the concentration of available phosphorus, and had no effect on the total organic carbon and total N concentration in the 0–20 cm soil depth. Nitrogen addition significantly stimulated activities of hydrolytic enzyme that acquiring N (urease) and phosphorus (acid phosphatase) and depressed the oxidative enzymes (phenol oxidase, peroxidase and catalase) activities. Results suggest that (1) this bamboo forest ecosystem is moving towards being limited by P or co-limited by P under elevated N deposition, (2) the expected progressive increases in N deposition may have a potential important effect on forest litter decomposition due to the interaction of inorganic N and oxidative enzyme activities, in such bamboo forests under high levels of ambient N deposition. Public Library of Science 2014-07-16 /pmc/articles/PMC4100878/ /pubmed/25029346 http://dx.doi.org/10.1371/journal.pone.0102315 Text en © 2014 Tu et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Tu, Li-hua
Chen, Gang
Peng, Yong
Hu, Hong-ling
Hu, Ting-xing
Zhang, Jian
Li, Xian-wei
Liu, Li
Tang, Yi
Soil Biochemical Responses to Nitrogen Addition in a Bamboo Forest
title Soil Biochemical Responses to Nitrogen Addition in a Bamboo Forest
title_full Soil Biochemical Responses to Nitrogen Addition in a Bamboo Forest
title_fullStr Soil Biochemical Responses to Nitrogen Addition in a Bamboo Forest
title_full_unstemmed Soil Biochemical Responses to Nitrogen Addition in a Bamboo Forest
title_short Soil Biochemical Responses to Nitrogen Addition in a Bamboo Forest
title_sort soil biochemical responses to nitrogen addition in a bamboo forest
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4100878/
https://www.ncbi.nlm.nih.gov/pubmed/25029346
http://dx.doi.org/10.1371/journal.pone.0102315
work_keys_str_mv AT tulihua soilbiochemicalresponsestonitrogenadditioninabambooforest
AT chengang soilbiochemicalresponsestonitrogenadditioninabambooforest
AT pengyong soilbiochemicalresponsestonitrogenadditioninabambooforest
AT huhongling soilbiochemicalresponsestonitrogenadditioninabambooforest
AT hutingxing soilbiochemicalresponsestonitrogenadditioninabambooforest
AT zhangjian soilbiochemicalresponsestonitrogenadditioninabambooforest
AT lixianwei soilbiochemicalresponsestonitrogenadditioninabambooforest
AT liuli soilbiochemicalresponsestonitrogenadditioninabambooforest
AT tangyi soilbiochemicalresponsestonitrogenadditioninabambooforest