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火烧对北亚热带天然次生林土壤有机碳的影响(PDF)

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

Issue:
2017年06期
Page:
115-119
Column:
研究论文
publishdate:
2017-11-30

Article Info:/Info

Title:
Effects of fire on soil organic carbon in natural secondary forest in north subtropical areas
Article ID:
1000-2006(2017)06-0115-05
Author(s):
QIAN Guoping1ZHAO Zhixia2 LI Zhengcai2*ZHOU Jungang3 CHENG Caifang2 ZHAO Ruiyu2 SUN Jiaojiao3
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
Keywords:
Keywords:natural secondary forest burned blank soil organic carbon soil nutrient
Classification number :
S718.5
DOI:
10.3969/j.issn.1000-2006.201607048
Document Code:
A
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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