Chin J Plan Ecolo ›› 2006, Vol. 30 ›› Issue (6): 901-910.doi: 10.17521/cjpe.2006.0114

• Research Articles • Previous Articles     Next Articles

SOIL N2O EMISSION AND ITS RESPONSE TO SIMULATED N DEPOSITION IN THE MAIN FORESTS OF DINGHUSHAN IN SUBTROPICAL CHINA

MO Jiang_Ming1; FANG Yun_Ting1; LIN Er_Da2; LI Yu_E2   

  1. 1 South China Botanical Garden, Chinese Academy of Sciences, Zhaoqing, Guangdong 526070, China; 2 Agrometeorology Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
  • Online:2006-11-30 Published:2006-11-30
  • Contact: MO Jiang_Ming

Abstract:

Background and Aims Most studies of the consequences of enhanced nitrogen deposition on sources and sinks of greenhouse gases have been performed in temperate ecosystems. Little information is available about greenhouse gases and responses to atmospheric nitrogen deposition in subtropical and tropical forests, especially in the forests of China. The objective of this study was to determine soil N2O emission and its response to simulated N deposition in pine forest (PF), pine-broadleaf mixed forest (MF), and monsoon evergreen broadleaf forest (MEBF) of Dinghushan in  subtropical China.
Methods Four N addition treatments (in three replicates) were establish ed in MEBF: Control, Low N (50 kg N•hm-2•a-1), Medium N (100 kg N •hm-2•a-1) and High N (150 kg N•hm-2•a-1), and three treatments were established in MF and PF (Control, Low N and Medium N). 
Key Results The effects of nitrogen addition on soil N2O emission differed by forest type. In MF, no significant differences were found among the three treatment after 3 months. In PF, however,  soil N2O emission rate was significantly higher in Medium plots than that in Low or Control plots, which exhibited no significant difference. In MEBF, soil N2O emission rate was highest in High N plots and significantly higher in Medium plots than in Low or Control plots, which exhibited no significant difference. 
Conclusions This study suggests that nitrogen addition significantly stimulated soil N2O emission rates in both MEBF and PF, and its effect generally increased with the levels of nitrogen addition, but there was no such significant effect in MF.

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] Chen Xun and Wu Hua-mei. Karyotype Analysis of CYCAS GUIZHOUENSIS[J]. Chin Bull Bot, 1990, 7(03): 45 -48 .
[2] Zhang Zhong-ming;Cui Ke-ming and Fan Yong-jun. Staining Plant Material Section With Toluiding Blue O Before Removal of Paraffin[J]. Chin Bull Bot, 1997, 14(02): 58 -60 .
[3] LIAO Xiang-Ru DU Jian-Fang LU Chun-Bin ZHOU Yan-Fen WANG Jian-Ping. The Effects of Mannitol on the Activity of Indole Acetic Acid Oxidase, Peroxidase and Glutathione S_transferase in Cells of Wheat[J]. Chin Bull Bot, 2001, 18(04): 496 -499 .
[4] FAN Shu-Guo LIANG Cheng-Ye LIU Hong-Xian. Studies on Fertility Variation of Rice in vitro Culture[J]. Chin Bull Bot, 2000, 17(03): 232 -241 .
[5] Yang Hong-yuan and Zhou Chang. Experimental Reproductive Biology and Reproductive Cell Engineering of Plants: Now and Future[J]. Chin Bull Bot, 1989, 6(04): 193 -196 .
[6] . [J]. Chin Bull Bot, 2006, 23(6): 730 .
[7] WENG Hua RAN Liang WEI Qun. Protein Phosphatases and Their Functions in Plant Responseto Environmental Stress[J]. Chin Bull Bot, 2003, 20(05): 609 -615 .
[8] Huang Cheng-yan;Yan Ting-jin and Shen Li. Study on the Differentiation of Pollen Albino Plants of Wheat in the Anther Culture of Different Microspore Stages[J]. Chin Bull Bot, 1991, 8(01): 51 -52 .
[9] Yaorong Wu;Qi Xie. ABA and Plant Stress Response[J]. Chin Bull Bot, 2006, 23(5): 511 -518 .
[10] Bin Jin-hua and Pan Rui-zhi. Methyl Jasmonates: Biochemistry Biophysiolgy and Role in Plant Resistance[J]. Chin Bull Bot, 1995, 12(04): 17 -21 .