International Institute for Tel: +43 2236 807 342 Applied Systems Analysis Fax: +43 2236 71313 Schlossplatz 1 E-mail:
[email protected] A-2361 Laxenburg, Austria Web: www.iiasa.ac.at Interim Report IR-01-015 Assessment of Potential Productivity of Tree Species in China, Mongolia and the Former Soviet Union: Methodology and Results Günther Fischer (
[email protected]) Harrij van Velthuizen (
[email protected]) Sylvia Prieler (
[email protected]) Approved by Arne Jemelöv (
[email protected]) Acting Director, IIASA March, 2001 Interim Reports on work of the International Institute for Applied Systems Analysis receive only limited review. Views or opinions expressed herein do not necessarily represent those of the Institute, its National Member Organizations, or other organizations supporting the work. Contents Abstract vi Acknowledgements vii About the Authors viii Chapter 1 Approach for the Assessment of Tree Species Productivity 1 1.1 Background 1 1.2 Ecological approach 1 1.3 This report 2 Chapter 2 Methodology Overview 3 Chapter 3 Land Resources Database 6 3.1 Climate resources 6 3.1.1 Moisture regimes 6 3.1.2 Thermal regimes 7 3.1.3 Aspect and terrain slope effects on micro-climate 8 3.2 Soil and terrain resources 8 3.3 Seasonal wet sites 9 3.4 Land cover and accessibility 10 Chapter 4 Potential Productivity Analysis 11 4.1 Land utilization types 11 4.2 Ecological requirements 13 4.3 Biomass increment calculation 19 4.4 Climatic related productivity constraints 31 4.5 Soil and terrain suitability analysis 32 4.6 Suitability analysis of seasonal wet sites 35 Chapter 5 Preliminary Results of Potential Forest Production Assessment 37 5.1 Assessment scenarios 38 5.2 Results for biomass plantation forestry 39 5.3 Results for traditional production forestry 41 5.4 Results for conservation forestry 42 Chapter 6 Concluding Remarks 43 References 45 ii Figures Figure 1 Conceptual framework of methodology.