Welcome to visit Scientia Silvae Sinicae,Today is

Scientia Silvae Sinicae ›› 2021, Vol. 57 ›› Issue (8): 13-23.doi: 10.11707/j.1001-7488.20210802

Previous Articles     Next Articles

Effects of Management Methods of Burned Wood on Soil Respiration and Its Components in the Permafrost Region of Cold Temperate Zone

Zixuan Wang1,Ding Wang2,Pengwu Zhao3,4,Qiyue Zhang3,Lei Yang3,Mei Zhou3,4,*   

  1. 1. Gansu Desert Control Research Institute Lanzhou 730070
    2. College of Resources and Environment Sciences, Gansu Agricultural University Lanzhou 730070
    3. College of Forestry, Inner Mongolia Agricultural University Hohhot 010019
    4. Saihanwula National Forest Ecosystem Research Station Chifeng 024000
  • Received:2020-01-25 Online:2021-08-25 Published:2021-09-30
  • Contact: Mei Zhou

Abstract:

Objective: The effects of different management methods of burned wood on soil respiration and its composition in the burned area of Larix gmelinii forest in the Daxing'anling permafrost region were investigated to understand the relations of soil respiration to soil temperature and moisture content, and to provide a theoretical basis for the restoration and reconstruction of the burned forest. Method: The burned area of L. gmelinii forest in 2009 in the cold temperate zone permafrost region were investigated using LI-8100 soil respiration measurement system to detect soil respiration rate in 2016 and 2017, while the seasonal variation of soil temperature and moisture content were also measured at the same time. The effects of soil temperature and moisture content changes on soil respiration rate were investigated and made a comparison among the sample plots of burned wood management (2009C for clear-cutting of burned wood, 2009S for selective cutting, and 2009N for no-cutting) and the control plots (2009CK for no-fire and no-cutting). Result: During the observation period, soil respiration rate (RS) and soil heterotrophic respiration rate (RH) in four models of sample plots were ranked as 2009S > 2009N > 2009CK > 2009C. In 2016, soil autotrophic respiration rate (RA) was ranked from large to small as 2009N > 2009S > 2009CK > 2009C. In 2017, it was 2009CK > 2009N > 2009S > 2009C. Four types of sample plots displayed that the soil heterotrophic respiration contribution ratio (CH) was larger than the soil autotrophic respiration contribution ratio (CA). The greatest CA was in the control plot (23.75%), while the minimum was in 2009C (16.04%), with a rank of 2009CK > 2009N > 2009S > 2009C. Soil respiration and its components were positively correlated with T10 in four sample plots (P < 0.01). Fire interference reduced the sensitivity coefficient of soil respiration and its components to the temperature. Conclusion: In the L. gmelinii forest in the Daxing'anling permafrost region, burning increased soil respiration rate, and soil heterotrophic respiration rate, which were further increased by selective cutting. However, all the increases were not significant (P > 0.05). Cutting the burned wood restricted the soil respiration rate and its components, and the soil autotrophic respiration rate of the 2009C significantly decreased from 2009CK (P < 0.05). Burning interference also diminished the contribution ratio of soil autotrophic respiration rate and cutting of the burned wood further reduced the CA, the higher the cutting intensity, the greater the decrease. The soil respiration and its components in the four types of sample plots revealed strongly significant positive correlation with 10 cm soil temperature (P < 0.01). The sensitivity of soil respiration and its components to soil temperature in the three sample plots of burned wood was lower than that in the control plots. There were no significant positive relations between soil respiration with its components and the 10 cm soil moisture content in the burned area of L. gmelinii forest permafrost region (P > 0.05).

Key words: Larix gmelinii forest, burned area, management of burned wood, soil respiration, soil respiration components

CLC Number: