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

QIAN Guoping,ZHAO Zhixia, LI Zhengcai,ZHOU Jungang, CHENG Caifang, ZHAO Ruiyu, SUN Jiaojiao

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2017, Vol. 41 ›› Issue (06) : 115-119.

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南京林业大学学报（自然科学版）
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JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2017, Vol. 41 ›› Issue (06) : 115-119. DOI: 10.3969/j.issn.1000-2006.201607048

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
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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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QIAN Guoping,ZHAO Zhixia, LI Zhengcai,ZHOU Jungang, CHENG Caifang, ZHAO Ruiyu, SUN Jiaojiao. Effects of fire on soil organic carbon in natural secondary forest in north subtropical areas[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2017, 41(06): 115-119 https://doi.org/10.3969/j.issn.1000-2006.201607048

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