Effects of nitrogen addition on the seasonal variations of soil labile organic carbon in different age poplar plantations

doi:10.3969/j.issn.1000-2006.2014.03.004

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2014, Vol. 38 ›› Issue (03): 19-23.doi: 10.3969/j.issn.1000-2006.2014.03.004

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Effects of nitrogen addition on the seasonal variations of soil labile organic carbon in different age poplar plantations

XU Kai,XU Yu,GE Zhiwei,YU Shuiqiang,WANG Guobing,FAN Huan,ZHOU Danyan,RUAN Honghua^*

Jiangsu Key Laboratory of Forestry Ecological Engineering,Nanjing Forestry University,Nanjing 210037,China

Online:2014-05-15 Published:2014-05-15

Abstract

Abstract: In order to understand the effects of atmospheric nitrogen deposition on the carbon cycle of forest ecosystem, a field experiment of nitrogen addition at Dongtai forest farm in Jiangsu province was conducted in May 2012. The results showed that the nitrogen addition increased the contents of soil microbial biomass carbon(MBC)and dissolved organic carbon(DOC).The soil MBC and DOC exhibited obvious seasonal patterns. Overall,the contents of soil MBC and DOC were higher in summer and autumn,but lower in winter and spring. The MBC had a significantly positive correlation with soil temperature(p<0.01).The DOC did not correlated with soil temperature(p>0.05).The results implicated that the seasonal variations of soil labile organic in poplar plantations were affected by soil temperature. In addition,the soil liable organic carbon respond positively to nitrogen addition.

CLC Number:

S714

XU Kai,XU Yu,GE Zhiwei,YU Shuiqiang,WANG Guobing,FAN Huan,ZHOU Danyan,RUAN Honghua. Effects of nitrogen addition on the seasonal variations of soil labile organic carbon in different age poplar plantations[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2014, 38(03): 19-23.

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Effects of nitrogen addition on the seasonal variations of soil labile organic carbon in different age poplar plantations

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