Climatically Suitable Growth Areas for Eucalyptus grandis

Eucalyptus grandis is native to the east coasts of Queensland and New South Wales in Australia, where it goes by the common name of Rose Gum (Meskimen and Francis, 2005). In its native habitat E. grandis, with its pronounced taproot, grows to 55 m in height on the lower slopes in well drained soils. Determination of Climatically Optimum Growth Areas of Eucalyptus grandis have been defined in the ICFR's Forestry Toolbox (Kunz, 2004), by mean annual precipitation (MAP) and mean annual temperature (MAT). This figure also shows the climatic conditions under which sub-optimum growth would take place because conditions may be too cold (snow/frost), too dry, because occasional drought may occur or because the trees may become diseased. Eucalyptus grandis Yield Estimates Based on Smith`s Rule-Based Approach Using Smith`s (1994) rule-based approach for estimating MAIs of E. grandis, and considering only his climatic criteria and not soil or management factors.

巨桉（Eucalyptus grandis）原产于澳大利亚昆士兰州与新南威尔士州的东海岸区域，当地通用俗称为玫瑰桉（Rose Gum）（Meskimen与Francis, 2005）。在原生栖息地中，该树种凭借发达的主根，在排水良好的低坡地带可生长至55米的高度。
依托年平均降水量（mean annual precipitation, MAP）与年平均气温（mean annual temperature, MAT）两项指标，ICFR林业工具箱（Kunz, 2004）已完成巨桉气候适宜生长区的划定工作。该图表同时展示了导致巨桉生长次优的气候条件，包括气温过低（降雪/霜冻）、降水不足、偶发干旱或是树木染病等情形。
基于史密斯规则法的巨桉产量估算：采用史密斯（1994）提出的规则法对巨桉的年平均生长量（MAIs）进行估算，且仅纳入其设定的气候指标，未考虑土壤条件与经营管理因素。