【摘要】 采用适宜指标预测沙地樟子松在引种地是否能够完成天然更新过程对指导科学造林具有现实意义。本研究选择平均气温、有效积温、无霜期、蒸发量等4项指标,通过系统聚类方法划分了沙地樟子松人工林能否天然更新的气候区。结果表明:具有寒冷、低温、无霜期90～120 d等气候特征的地区为其天然更新最适宜或适宜气候区,包括鄂温克旗、多伦县、红花尔基林业局、西乌珠穆沁旗、塞罕坝机械林场、右玉县、讷河市、扶余县等16个地区;而具有气温高、有效积温3 000℃及以上、平均无霜期150 d以上等气候特征的地区为天然更新较不适宜气候区,包括科尔沁区、科左中旗、东胜区、伊金霍洛旗、乌审旗、磴口县、民勤县等11个地区。更多还原

【Abstract】 Using suitable indicators to predict whether Pinus sylvestris var. mongolica in sandy land can complete the natural regeneration process or not has practical significance for guiding scientific afforestation. Four indicators including average temperature, average effective accumulated temperature, average frost-free period and average evaporation were selected, and the climate zone for natural regeneration of Pinus sylvestris var. mongolica plantation in sandy land was divided by use of systematic clustering. The results showed that the areas, with climatic characteristics such as cold, low temperature and frost-free period of 90-120 days, were the most suitable or suitable climatic zones for natural regeneration, including Ewenki Banner, Duolun County, Honghuaerji Forestry Bureau, West Ujimqin Banner, Saihanba mechanical forest farm, Youyu County, Nehe City, Fuyu County and other 16 regions. However, the regions, with climatic characteristics such as high temperature, average effective accumulated temperature of 3 000 ℃ and above, and average frost-free period over 150 days, were less suitable climatic zones for natural regeneration, including Horqin District, Horqin Youyi Middle Banner, Dongsheng District, Ejin Horo Banner, Uxin Banner, Dengkou County, Minqin County and other 11 regions.更多还原