林火对兴安落叶松根生物量及碳氮养分浓度的影响

楚旭; 邸雪颖; 杨光

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林火对兴安落叶松根生物量及碳氮养分浓度的影响

楚旭, 邸雪颖, 杨光

文章导航 > 北京林业大学学报 > 2013 > 35(2): 10-16

楚旭, 邸雪颖, 杨光. 林火对兴安落叶松根生物量及碳氮养分浓度的影响[J]. 北京林业大学学报, 2013, 35(2): 10-16.

引用本文:

楚旭, 邸雪颖, 杨光. 林火对兴安落叶松根生物量及碳氮养分浓度的影响[J]. 北京林业大学学报, 2013, 35(2): 10-16.

CHU Xu, DI Xue-ying, YANG Guang. Impacts of forest fire on root biomass, carbon and nitrogen concentration of Larix gmelinii.[J]. Journal of Beijing Forestry University, 2013, 35(2): 10-16.

Citation:

CHU Xu, DI Xue-ying, YANG Guang. Impacts of forest fire on root biomass, carbon and nitrogen concentration of Larix gmelinii.[J]. Journal of Beijing Forestry University, 2013, 35(2): 10-16.

林火对兴安落叶松根生物量及碳氮养分浓度的影响

1.
东北林业大学林学院

Impacts of forest fire on root biomass, carbon and nitrogen concentration of Larix gmelinii.

1.
College of Forestry, Northeast Forestry University, Harbin,150040, P.R. China.

摘要: 以大兴安岭塔河林业局兴安落叶松林为研究对象，对不同时间火烧迹地进行调查，采用挖掘法获取土壤根系样品，研究火后落叶松根生物量，C、N养分浓度及C/N值变化。结果表明：1）火烧后1周，受低强度和中等强度火烧树木的活根生物量仅是对照树木的80%和36%，＜1 mm细根生物量则分别是对照的60%和19%。2）火烧后3个月，受低强度火烧树木细根得到了一定程度的恢复，受中等强度火烧树木根恢复程度明显低于受低强度火烧树木；火后2年，前者根生物量与对照树木无明显差异，而后者＜1 mm细根生物量与对照无显著差异，得到恢复。3）火烧降低了树木根的碳和氮养分浓度，低强度火烧使C/N值减小，而中等强度火烧使C/N值增加。林火对树木根系产生了显著的影响，烧毁根系，改变其生理活性及生存环境；而树木根系的恢复受多种因素影响。
- 兴安落叶松 /
- 根生物量 /
- 养分浓度 /
- C/N值 /
- 火烧强度
Abstract: With Larix gmelinii forests as test objects in Tahe Forestry Bureau on Great Xing’an Mountains, northeastern China, taking the investigation of forests burned at different time, their roots were sampled to analyze the change of root biomass, C and N nutrient concentration and C/N value after the fire. The results showed that: 1) One week after fire, live root biomass of low intensity and moderate intensity burning trees were only 80% and 36% of control trees, fine root biomass of ＜1 mm diameter were 60% and 19% of control trees, respectively; 2) Three months after fire, fine roots of low intensity burning trees had came to a certain degree of recovery, fine roots of moderate intensity burning trees was significantly lower than the recovery degree of low intensity one. Two years after fire, there was no significant difference between the root biomass of low intensity burning tree and control, and there was no significant difference between fine root biomass of ＜1 mm diameter of moderate intensity burning trees and control; 3) Fire reduced tree root nutrient concentrations of carbon and nitrogen, low intensity burning decreased the value of C/N, however, moderate intensity burning increased the value of C/N. Forest fire had a significant impact on tree roots. After roots of trees were burned, their physical activity and living environment were also changed and many factors will affect the recovery of roots.
- Larix gmelinii /
- root biomass /
- nutrient concentration /
- C/N value /
- fire intensity

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林火对兴安落叶松根生物量及碳氮养分浓度的影响

1. 东北林业大学林学院

收稿日期: 1900-01-01
修回日期: 1900-01-01
刊出日期: 2013-03-30

关键词:

C/N值 /

摘要: 以大兴安岭塔河林业局兴安落叶松林为研究对象，对不同时间火烧迹地进行调查，采用挖掘法获取土壤根系样品，研究火后落叶松根生物量，C、N养分浓度及C/N值变化。结果表明：1）火烧后1周，受低强度和中等强度火烧树木的活根生物量仅是对照树木的80%和36%，＜1 mm细根生物量则分别是对照的60%和19%。2）火烧后3个月，受低强度火烧树木细根得到了一定程度的恢复，受中等强度火烧树木根恢复程度明显低于受低强度火烧树木；火后2年，前者根生物量与对照树木无明显差异，而后者＜1 mm细根生物量与对照无显著差异，得到恢复。3）火烧降低了树木根的碳和氮养分浓度，低强度火烧使C/N值减小，而中等强度火烧使C/N值增加。林火对树木根系产生了显著的影响，烧毁根系，改变其生理活性及生存环境；而树木根系的恢复受多种因素影响。

English Abstract

Impacts of forest fire on root biomass, carbon and nitrogen concentration of Larix gmelinii.

1. College of Forestry, Northeast Forestry University, Harbin,150040, P.R. China.

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2013-03-30

Keywords:

Abstract: With Larix gmelinii forests as test objects in Tahe Forestry Bureau on Great Xing’an Mountains, northeastern China, taking the investigation of forests burned at different time, their roots were sampled to analyze the change of root biomass, C and N nutrient concentration and C/N value after the fire. The results showed that: 1) One week after fire, live root biomass of low intensity and moderate intensity burning trees were only 80% and 36% of control trees, fine root biomass of ＜1 mm diameter were 60% and 19% of control trees, respectively; 2) Three months after fire, fine roots of low intensity burning trees had came to a certain degree of recovery, fine roots of moderate intensity burning trees was significantly lower than the recovery degree of low intensity one. Two years after fire, there was no significant difference between the root biomass of low intensity burning tree and control, and there was no significant difference between fine root biomass of ＜1 mm diameter of moderate intensity burning trees and control; 3) Fire reduced tree root nutrient concentrations of carbon and nitrogen, low intensity burning decreased the value of C/N, however, moderate intensity burning increased the value of C/N. Forest fire had a significant impact on tree roots. After roots of trees were burned, their physical activity and living environment were also changed and many factors will affect the recovery of roots.

楚旭, 邸雪颖, 杨光. 林火对兴安落叶松根生物量及碳氮养分浓度的影响[J]. 北京林业大学学报, 2013, 35(2): 10-16.

引用本文:

楚旭, 邸雪颖, 杨光. 林火对兴安落叶松根生物量及碳氮养分浓度的影响[J]. 北京林业大学学报, 2013, 35(2): 10-16.

CHU Xu, DI Xue-ying, YANG Guang. Impacts of forest fire on root biomass, carbon and nitrogen concentration of Larix gmelinii.[J]. Journal of Beijing Forestry University, 2013, 35(2): 10-16.

Citation:

CHU Xu, DI Xue-ying, YANG Guang. Impacts of forest fire on root biomass, carbon and nitrogen concentration of Larix gmelinii.[J]. Journal of Beijing Forestry University, 2013, 35(2): 10-16.