globalchange  > 过去全球变化的重建
DOI: 10.1371/journal.pone.0102315
论文题名:
Soil Biochemical Responses to Nitrogen Addition in a Bamboo Forest
作者: Li-hua Tu; Gang Chen; Yong Peng; Hong-ling Hu; Ting-xing Hu; Jian Zhang; Xian-wei Li; Li Liu; Yi Tang
刊名: PLOS ONE
ISSN: 1932-6203
出版年: 2014
发表日期: 2014-7-16
卷: 9, 期:7
语种: 英语
英文关键词: Bamboo ; Forest ecology ; Ecosystems ; Nitrification ; Forests ; Biomass (ecology) ; Ureases ; Seasonal variations
英文摘要: 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://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0102315&type=printable
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/18664
Appears in Collections:过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响

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作者单位: College of Forestry, Sichuan Agricultural University, Ya'an, Sichuan, China;College of Forestry, Sichuan Agricultural University, Ya'an, Sichuan, China;College of Forestry, Sichuan Agricultural University, Ya'an, Sichuan, China;College of Forestry, Sichuan Agricultural University, Ya'an, Sichuan, China;College of Forestry, Sichuan Agricultural University, Ya'an, Sichuan, China;College of Forestry, Sichuan Agricultural University, Ya'an, Sichuan, China;College of Forestry, Sichuan Agricultural University, Ya'an, Sichuan, China;Personnel Department, Sichuan Agricultural University, Ya'an, Sichuan, China;College of Horticulture, Sichuan Agricultural University, Ya'an, Sichuan, China

Recommended Citation:
Li-hua Tu,Gang Chen,Yong Peng,et al. Soil Biochemical Responses to Nitrogen Addition in a Bamboo Forest[J]. PLOS ONE,2014-01-01,9(7)
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