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...

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Main Authors: Li-hua Tu, Gang Chen, Yong Peng, Hong-ling Hu, Ting-xing Hu, Jian Zhang, Xian-wei Li, Li Liu, Yi Tang
Format: Article
Language:English
Published: Public Library of Science (PLoS) 2014-01-01
Series:PLoS ONE
Online Access:http://europepmc.org/articles/PMC4100878?pdf=render
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spelling doaj-e26c642a627d42e08e3a8e91d96507532020-11-25T02:31:45ZengPublic Library of Science (PLoS)PLoS ONE1932-62032014-01-0197e10231510.1371/journal.pone.0102315Soil biochemical responses to nitrogen addition in a bamboo forest.Li-hua TuGang ChenYong PengHong-ling HuTing-xing HuJian ZhangXian-wei LiLi LiuYi TangMany 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 NH4(+), NO3(-), 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.http://europepmc.org/articles/PMC4100878?pdf=render
collection DOAJ
language English
format Article
sources DOAJ
author Li-hua Tu
Gang Chen
Yong Peng
Hong-ling Hu
Ting-xing Hu
Jian Zhang
Xian-wei Li
Li Liu
Yi Tang
spellingShingle Li-hua Tu
Gang Chen
Yong Peng
Hong-ling Hu
Ting-xing Hu
Jian Zhang
Xian-wei Li
Li Liu
Yi Tang
Soil biochemical responses to nitrogen addition in a bamboo forest.
PLoS ONE
author_facet Li-hua Tu
Gang Chen
Yong Peng
Hong-ling Hu
Ting-xing Hu
Jian Zhang
Xian-wei Li
Li Liu
Yi Tang
author_sort Li-hua Tu
title Soil biochemical responses to nitrogen addition in a bamboo forest.
title_short 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_sort soil biochemical responses to nitrogen addition in a bamboo forest.
publisher Public Library of Science (PLoS)
series PLoS ONE
issn 1932-6203
publishDate 2014-01-01
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 NH4(+), NO3(-), 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.
url http://europepmc.org/articles/PMC4100878?pdf=render
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