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中文摘要：
对广东廉江石岭林场尾细桉等5种7．5年生桉树无性系的生物量和能量进行了研究。结果表明：不同元性系各组分生物量的分布规律均以干的最大、叶的最小，枝、根、皮介于中间；5种桉树无性系各组分的生物量排序为：赤桉、尾细桉、巨尾桉为干〉根〉枝〉皮〉叶，雷林1号桉为干〉根〉皮〉枝〉叶，尾叶桉为干〉枝〉根〉皮〉叶。人工林生物量现存量的排列顺序为尾细桉（161．60t·hm^-2）〉巨尾桉（127．96t·hm^-2）〉尾叶桉（112．60t·hm^-2）〉赤桉（83．81t·hm^-2）〉雷林1号桉（71．36t·hm^-2）。各组分的灰分含量各不相同，以叶最高（4．08％～6．88％），干最低（0．17％～0．43％）。不同组分的于质量热值介于17．94～21．06kJ·g^-1间，去灰分热值介于18．57～22．12kJ·g^-1间，均以叶的值最高。植株体的平均干质量热值和去灰分热值分别为19．02～19．32、19．49～19．85kJ·g^-1，平均干质量热值的排序为雷林1号桉〉尾叶桉〉尾细桉〉赤桉〉巨尾桉，平均去灰分热值的排序为雷林1号桉〉赤桉〉尾叶桉〉尾细桉〉巨尾桉。5种桉树无性系林的能量现存量为1360．73～3067．47GJ·hm^-2，大小顺序为尾细桉〉巨尾桉〉尾叶桉〉赤桉〉雷林1号桉。综合生物量和能量现存量分析，尾细桉选作能源树种最为理想，巨尾桉和尾叶桉次之，赤桉与雷林1号桉最差。
英文摘要：
The biomass and energy of 7.5-year-old trees of Eucalyptus urophylla×E. tereticornis and other four eucalypt clones, growing in Shiling Forest Farm of Lianjiang City in Guangdong Province were studied. The results showed that the biomass of various above and below ground components of trees were significantly different with stem-wood having the highest biomass and leaves the lowest; biomasses of branches, roots and bark were intermediate between that of stem-wood and leaves. The order of various components by decreasing biomass for the clones of E. camaldulensis, E. urophylla ×E. tereticornis and E. grandis × E. urophylla was stem-wood 〉 roots 〉 branches 〉 bark 〉 leaves. For the clone E. Leizhou No. 1 the order was stern-wood 〉 roots 〉 bark 〉 branches 〉 leaves and for the clone of E. urophylla the order was stem-wood 〉 branches 〉 roots 〉 bark 〉 leaves. The clones by decreasing order of total retained biomass of plantation were： E. urophylla × E. tereticornis （161.60 t· hm-2） 〉 E. grandis x E. urophyUa （ 127.96 t · hm-2 ） 〉 E. urophylla （ 112.60 t· hm-2 ） 〉 E. camaldulensis （ 83.81 t· hm-2） 〉E. Leizhou No. 1 （71.36 t· hm-2）. Ash contents of leaves of different clones ranged from 4.08% to 6.88% , and were the highest of all components, whilst the ash contents of stem-wood of different clones ranged from 0. 17% to 0.43% and were the lowest of all components. Gross caloric values （GCV） and ash free caloric values （AFCV） of different components ranged from 17.94 to 21.06 kJ · g^-1 and 18.57 to 22. 12 kJ · g^-1 respectively. Of all the components, leaves had the highest GVCs and AFCVs. The average GVC and AFCV of the five clones ranged from 19.02 to 19.32 kJ· g^-1 and 19.49 to 19.85 kJ · g^-1 respectively. The order of five clones by decreasing GCV was E. Leizhou No. 1 〉 E. urophylla 〉 E. urophylla × E. tereticornis 〉 E. camaldulensis 〉 E. grandis × E. urophylla and by decreasing AFCV the order was E. leizhou No. 1 〉 E. camaldulensi
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A new analytical model for thermal stresses in multi-phase materials and lifetime prediction methods
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