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Articles containing the keyword 'China'

Category : Article

article id 5087, category Article
Olavi Luukkanen. (1980). Notes on the forests of North-Eastern China and their utilization. Silva Fennica vol. 14 no. 4 article id 5087. https://doi.org/10.14214/sf.a15028
Keywords: forestry; China; forest industry; forest products industry; forest research; Harbin
Abstract | View details | Full text in PDF | Author Info

The paper consists of a report of a study tour made by Finnish forestry students, under the leadership of the author, to Harbin, Changchun, Peking, Nanking and Shanghai in December 1977. In addition, some earlier literature sources concerning forestry in China are briefly reviewed. The paper presents the general geographic characteristics of north-eastern China, as well as the vegetation zones and timber species of this region. Silvicultural methods and the main features of forest technology and forest industry are also discussed. The last chapters describe the forestry administration and current trends in forestry education and research in north-eastern China as observed during the tour.

The PDF includes a summary in Finnish.

  • Luukkanen, E-mail: ol@mm.unknown (email)

Category : Research article

article id 913, category Research article
Han Zhang, Joseph Buongiorno. (2012). Markets, government policy, and China's timber supply. Silva Fennica vol. 46 no. 4 article id 913. https://doi.org/10.14214/sf.913
Keywords: market; China; supply; policy; land reform; econometrics
Abstract | View details | Full text in PDF | Author Info
China's domestic demand and exports of wood products are rising rapidly compared to domestic supply. The determinants of timber supply in China were investigated with panel data from 25 provinces from 1999 to 2009. The results indicated that China’s timber supply had responded to both market forces, reflected by timber prices largely determined by world demand and supply, and to government policies expressed by production quotas and the tenure reform on collective forestland. The price elasticity of China’s timber supply was estimated at 0.31±0.12. The inelastic response of production to the quota (0.20±0.02) suggested that government had a limited, though significant, control of timber supply. Other things being equal, the land tenure reform increased timber supply by 18±8 percent, where and when it had been implemented.
  • Zhang, Research Center for Resource Economics and Environment Management, Northwest A&F University. No. 3 Taicheng Road, Yangling, Shaanxi, China 712100 E-mail: hz@nn.fi
  • Buongiorno, Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, WI 53706, U.S.A. E-mail: jbuongio@wisc.edu (email)
article id 587, category Research article
Erkki Tomppo, Kari T. Korhonen, Juha Heikkinen, Hannu Yli-Kojola. (2001). Multi-source inventory of the forests of the Hebei Forestry Bureau, Heilongjiang, China. Silva Fennica vol. 35 no. 3 article id 587. https://doi.org/10.14214/sf.587
Keywords: models; forest inventory; satellite images; k-nearest neighbour method; China
Abstract | View details | Full text in PDF | Author Info
A multi-source forest inventory method is applied to the estimation of forest resources in the area of the Hebei Forest Bureau in Heilongjiang province in North-East China. A stratified systematic cluster sampling design was utilised in field measurements. The design was constructed on the basis of information from earlier stand-level inventories, aerial orthophotographs, experiences from other sampling inventories and the available budget. Sample tree volumes were estimated by means of existing models. New models were constructed and their parameters estimated for tallied tree volumes and volume increments. The estimates for the area of the Bureau were computed from field measurements, and for the areas of the forest farms estimated from field measurements and satellite images. A k-nearest neighbour method was utilised. This method employing satellite image data makes it possible to estimate all variables, particularly for smaller areas than that possible using field measurements only. The methods presented, or their modifications, could also be applied to the planning and realisation of forest inventories elsewhere in Temperate or Boreal zones. The inventory in question gave an estimate of 114 m3/ha (the multi-source inventory 119 m3/ha) instead of 72 m3/ha as previously estimated from available information. Totally nineteen tree species, genera of species or tree species groups were identified (Appendix 1). The forests were relatively young, 60% of them younger than 40 years and 85% younger than 60 years.
  • Tomppo, Finnish Forest Research Institute, Unioninkatu 40 A, FIN-00170 Helsinki, Finland E-mail: erkki.tomppo@metla.fi (email)
  • Korhonen, Finnish Forest Research Institute, Unioninkatu 40 A, FIN-00170 Helsinki, Finland E-mail: ktk@nn.fi
  • Heikkinen, Finnish Forest Research Institute, Unioninkatu 40 A, FIN-00170 Helsinki, Finland E-mail: jh@nn.fi
  • Yli-Kojola, Finnish Forest Research Institute, Unioninkatu 40 A, FIN-00170 Helsinki, Finland E-mail: hyk@nn.fi
article id 599, category Research article
Chun-Jiang Liu, Carl J. Westman, Hannu Ilvesniemi. (2001). Matter and nutrient dynamics of pine (Pinus tabulaeformis) and oak (Quercus variabilis) litter in North China. Silva Fennica vol. 35 no. 1 article id 599. https://doi.org/10.14214/sf.599
Keywords: Pinus; Quercus; decomposition; nutrients; fall; forest floor; litter; North China
Abstract | View details | Full text in PDF | Author Info
In the mountainous area of North China, a distinguishing feature of climate is the serious drought of spring and the humidity and high temperature of summer by which the litter production and decomposition of forest litter were strongly characterized. We investigated the dynamic and nutrient characteristics of litter in a 30-year-old mixed stand of Chinese pine (Pinus tabulaeformis Carr.) and deciduous orient oak (Quercus variabilis Bl.) and two comparable pure stands. Oak litterfall peaked in November and pine litterfall in December. The oak stand had the largest annual litterfall (347 g m–2) and the forest floor mass (950 g m–2), the mixed stand the second (236 g m–2 and 634 g m–2), and the pine stand the least (217 g m–2 and 615 g m–2). The nutrient return through litterfall and the storage in forest floor followed corresponding order between three stands. The weight loss of pine and oak foliage litter in first year was 25% and 20%. For senesced pine and oak leaves, the translocation rates of N, P and K were 56–83%. Nutrient concentrations were higher in oak leaf litter than pine needle litter, and the concentration of N and Ca appeared to rise while K concentration decreased in both decomposing litter.
  • Liu, Department of Forest Ecology, P.O. Box 27, FIN-00014 University of Helsinki, Finland E-mail: cliu@silvia.helsinki.fi (email)
  • Westman, Department of Forest Ecology, P.O. Box 27, FIN-00014 University of Helsinki, Finland E-mail: cjw@nn.fi
  • Ilvesniemi, Department of Forest Ecology, P.O. Box 27, FIN-00014 University of Helsinki, Finland E-mail: hi@nn.fi

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