JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2017, Vol. 41 ›› Issue (06): 115-119.doi: 10.3969/j.issn.1000-2006.201607048

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Effects of fire on soil organic carbon in natural secondary forest in north subtropical areas

QIAN Guoping1,ZHAO Zhixia2, LI Zhengcai2*,ZHOU Jungang3, CHENG Caifang2, ZHAO Ruiyu2, SUN Jiaojiao3   

  1. 1.Wanshi Town Forestry Station of Fuyang District of Hangzhou City, Zhejiang Province,Hangzhou 311406, China; 2.Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, China; 3.Fuyang District Agroforestry Bureau of Hangzhou City, Zhejiang Province, Hangzhou 311400, China
  • Online:2017-12-18 Published:2017-12-18

Abstract: 【Objective】This study was aimed at examining the effects of fire on soil organic carbon in a natural secondary forest in north subtropical regions of China.【Method】 Experiments were conducted to analyze changes in soil organic carbon and soil nutrient levels at a depth of 0-50 cm in one year after a fire in anatural secondary forest located in the north subtropical regions. Five sample plots were established in the burnt forest regions and control regions which size of 20 m×20 m, soil samples from 0-50 cm deep layers were collected, and the levels of soil organic carbon and soil nutrients were measured.【Result】 Light fraction organic matter(LFOM), easily oxidized carbon(EOC)and soil total organic carbon(TOC)levels were higher in the burnt forest soil than the control area, which increased by 1.2%-61.5%, 9.6%-47.4%, 3.9%-35.1%, respectively. The changes in these indicators reached significance at soil depth of 0-10 cm(P<0.01), implying that after the increase in TOC, soil LFOM and EOC were basically on the surface, and carbon in soil storage at a depth of 0-50 cm increased by 18.8% in one year after the forest fire compared with the control areas. LFOM, TOC and EOC directly affected the nutrient status of the soil, especially after the forest fire. 【Conclusion】 In one year after the forest fire, TOC and soil nutrient content increased mainly in surface soil.

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