Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2019, Vol. 40 ›› Issue (11): 2294-2299.DOI: 10.3969/j.issn.1000-2561.2019.11.027

• Ecology and Review • Previous Articles     Next Articles

Soil Organic Carbon Distribution in Five Forest Types in the Northeast of Hainan Island

XUE Yang,SU Shaofeng,LIN Zhipan,WANG Xiaoyan,CHEN Yiqing(),XUE Yanwen,CHEN Pingmei   

  1. Hainan Forestry Institute, Haikou, Hainan 571100, China
  • Received:2019-02-13 Revised:2019-04-26 Online:2019-11-25 Published:2019-11-28
  • Contact: Yiqing CHEN


To reveal the soil organic carbon (SOC) distribution characteristics in different forest types in Northeastern Hainan, the data of SOC content and storage under five forest types (Pinus elliottii×P. caribaea, Casuarina equisetifolia, Cocos nucifera, Secondary forest and Mingled forest) in this region were analyzed. The results showed that in the 0-100 cm soil profile, the average SOC content of the five forests was significantly different (P<0.05). The highest was found in the secondary forest soil (3.78 g/kg), while in Casuarina equisetifolia the values were the minimum (0.90 g/kg); SOC storage values were 46.06 t/hm 2 in the secondary forest, 40.52 t/hm 2 in the mingled forest, 39.08 t/hm 2in Pinus elliottii×P. caribaea, 31.26 t/hm 2 in Cocosnucifera and 15.22 t/hm 2 in Casuarina equisetifolia. The secondary forests on shallow marine deposits and mingled forests on coastal sandy soil had relatively high SOC storage, which were significantly higher than Cocos nucifera and Casuarina equisetifolia on the same parent material respectively (P<0.05). In summary, the planting of different types of forests within this region would have a profound prospect on SOC storage, and the establishment of secondary forests and mingled forests may help the increment of SOC sequestration.

Key words: Hainan Island, forest type, soil organic carbon