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Scientia Silvae Sinicae ›› 2014, Vol. 50 ›› Issue (9): 26-35.doi: 10.11707/j.1001-7488.20140904

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Effects of Different Forest Management Regimes on Carbon Stock in Natural Secondary Forests at Danqinghe Forestry Farm

Rong Jiantao1 2, He Youjun3   

  1. 1. Wenzhou Vocational College of Science and Technology Wenzhou 325006;
    2. Institute of Forest Resources Information Techniques, CAF Beijing 100091;
    3. Research Institute of Forestry Policy and Information, CAF Beijing 100091
  • Received:2013-10-14 Revised:2014-06-04 Online:2014-09-25 Published:2014-09-30
  • Contact: 何友均

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Abstract:

How to increase carbon stock in forest ecosystems by optimizing forest management strategy has increasingly become a concern in the world. We analyzed the changes in carbon stock in three natural secondary forests, i.e., coniferous forest, broadleaved forest and conifer-broadleaved mixed forest, in Danqinghe Forest Farm, Heilongjiang Province, based on the three management regimes including target-trees management, extensive management and non-disturbance regime. The results showed that: 1) The total stand carbon stock was ranked in order of target-tree management (162.74-205.85 t ·hm-2) > non-disturbance management (128.88-150.47 t ·hm-2) > extensive management (107.59-130.57 t ·hm-2), and target-tree management differed significantly in carbon stock from non-disturbance and extensive management (P<0.05). 2) Layers in these stands had different amount of carbon stock, followed in percentage by soil layer (57.33%-70.38%), tree layer (28.01%-39.83%), litter layer (0.50%-2.69%), shrub layer (0.21%-1.00%), and herb layer (0.07%-0.56%). 3) The carbon stock in soil was in order of target-tree management> non-disturbance management > extensive management, and carbon content and carbon stock reached the utmost level in the soil 0-20 cm deep. 4) Carbon stock of tree layer was in order of target-tree management > non-disturbance management > extensive management, and there was significant difference between target-tree management and non-disturbance, extensive management regimes (P<0.05), while carbon stock in stems were proportionally the highest in the tree layer, accounting for 46.58％ to 54.72％. 5) Carbon stock in shrubs and herbs showed the same order as non-disturbance management > extensive management > target-tree management, and non-disturbance management was significantly different from target-tree and extensive management regimes(P<0.05). 6) In terms of carbon stock in litters, target-tree management outperformed extensive management and non-disturbance management. Target tree management could increase carbon stock of stand level, soil layer, tree layer, indicating that it was important forest management regime for improving the carbon sink ability of secondary forest in northeast.

Key words: carbon stock, carbon content, forest management regimes, natural secondary forest

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