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高浓度CO2对红松幼苗及土壤碳氮特征的影响(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2016年01期
Page:
27-32
Column:
专题报道
publishdate:
2016-01-31

Article Info:/Info

Title:
Effects of higher CO2 concentration on carbon and nitrogen characteristics of Pinus koraiensis seedling and its soil in an experimental environment
Article ID:
1000-2006(2016)01-0027-06
Author(s):
ZHANG YunCUI Xiaoyang*
College of Forestry, Northeast Forestry University, Harbin 150040, China
Keywords:
CO2 concentration Pinus koraiensis seedling carbon and nitrogen characeristics of soil response strategies of carbon and nitrogen
Classification number :
S718
DOI:
10.3969/j.issn.1000-2006.2016.01.005
Document Code:
A
Abstract:
Carbon and nitrogen characteristics of Pinus koraiensis seedling and its soil under different CO2 concentrations were investigated to explore the response strategies of P. koraiensis and their habitats to higher CO2 concentration conditions. Based on growth chamber method, the concentration and accumulation of carbon and nitrogen in P. koraiensis seedling organs and its soil were measured and compared under environmental CO2 concentration of 350 μmol/mol and 700 μmol/mol, respectively. Comparing to lower CO2 concentration of 350 μmol/mol after a growth season, the results showed that: ① No significant difference of carbon concentration was detected in root, stem and leaf of P. koraiensis seedling by CO2 treatments, however carbon accumulation of the leaf increased by 37.63% when CO2 concentration increased to 700 μmol/mol. ② Nitrogen concentration of root, stem and leaf decreased significantly at higher CO2 concentration, and the stem nitrogen accumulation to CO2 enrichment declined by 27.45%. ③ C/N ratio of root, stem and leaf to CO2 enrichment increased significantly. ④ Concentration of soil extractable dissolved organic carbon increased significantly by 28.82% at higher CO2 condition, the concentration of soil organic carbon, microbial biomass carbon, soil total nitrogen, microbial biomass nitrogen and hydrolysable nitrogen did not change significantly between CO2 treatments, and soil C/N ratio to CO2 enrichment varied with a small increasement. Overall, nitrogen concentration, C/N ratio, leaf carbon accumulation of P. koraiensis seedling and soil extractable dissolved organic carbon responded quickly to higher CO2 concentration during this period.

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Last Update: 2016-02-25