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Scientia Silvae Sinicae ›› 2014, Vol. 50 ›› Issue (10): 16-23.doi: 10.11707/j.1001-7488.20141003

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Estimation of Forest NPP in Xiaoxing'an Mountains in 1901—2008

Yu Ying, Fan Wenyi, Yang Xiguang   

  1. Northeast Forestry University Harbin 150040
  • Received:2013-07-11 Revised:2014-08-25 Online:2014-10-25 Published:2014-11-12

Abstract:

In this study, net primary productiviby (NPP) data at various stand ages for eight major forest types in Xiaoxing'an Mountains in northeast China were estimated from stand yield tables with consideration of the total biomass increment and foliage and fine-root turnovers. Then, we estimated the spatial and temporal changes in NPP according to NPP-age relationships and InTEC model. The results indicated that the forest NPP increased quickly at young ages, reached the maximum value at middle age (10-40 years old), and then decreased to a relative stable level at old ages. NPP of planted stands in Xiaoxing'an Mountains was larger than the natural forest. Natural coniferous forest can accumulated more carbon than natural broad-leaved mixed forest and natural coniferous and broad-leaved mixed forest. Forest NPP in Xiaoxing'an Mountains in 1901-2008 presented an increase trend, NPP in 2008 increased by 30 percent more than that in 1901. Forest NPP was higher in middle part and lower in northern and southern part because of the elevation effects on NPP.

Key words: net primary productivity (NPP), stand age, InTEC model, climate

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