Characteristic Analysis on Caloric Values and Carbon Contents of Dominant Trees in Karamay Region | 克拉玛依地区主要树种干部热值与碳含量特征分析

Chinese. 采用量热法、干烧法、干灰化法对克拉玛依地区50个主要树种（乔木34种，灌木16种）干部的热值、碳含量、灰分含量进行研究。结果表明：50个主要树种干部的热值在17．753～19．112kJ・g. 1之间，均值为18．285kJ・g. 1，柠条、樟子松相对较大，分别为19．112，19．025kJ・g. 1；碳含量在44．57％～50．35％之间，均值为48．88％，以倒榆的碳含量最高（50．35％），其次为樟子松（50．34％）、黑果枸杞（50．11％）、大果沙棘（50．00％）；灰分含量在0．29％～2．34％之间，均值为0．82％，胡密杨灰分含量最高（2．34％），樟子松最低（0．29％）。在生活型方面，34种乔木干部的平均热值为18．256kJ・g. 1，16种灌木为18．335kJ・g. 1，碳含量分别为48．86％和48．87％，灰分含量分别为0．82％和0．81％，皆不存在显著性差异（P〉0．05）。热值与碳含量之间存在极显著的正相关关系（P〈0．01），热值与灰分含量、碳含量与灰分含量之间的相关性不显著（P〉0．05）。聚类分析结果将50种树木分成4个大类，其中柠条和樟子松为高热值、高碳含量树种，黑果枸杞、卫矛、紫丁香、杜梨、沙枣、大果沙棘、桑树、李为较高热值、较高碳含量树种，其余树种的热值和碳含量则较低。

English. In this paper, we investigated the caloric values, carbon contents and ash contents of stems from fifty dominant tree species, including thirty-four arbor species and sixteen shrub species, in Karamay region by using calorimetric method, dry combustion method and dry ashing method, respectively. The results showed that caloric values of fifty species were in the range of 17. 753 - 19. 112 kJ・g. 1, with the average value of 18. 285 kJ・g. 1 Caragana intermedia and Pinus sylvestris var. mongolica had relatively high caloric values, and the mearis were 19. 112 kJ・g. 1 and 19. 025 kJ・g. 1, respectively. The carbon contents were in the range of 44.57% -50.35% , with the average value of 48.88%. Ulmus pumila cv. Pendula had the greatest carbon content among the fifty species, with 50.35% , followed by P. sylvestris var. mongolica （50.34%） , Lycium ruthenicum （50.11% ） and Hippophae rhamnoides （50.00%）. The ash contents were in the range of 0.29% -2.34% , with the average value of 0.82%. Populus talassica ~ P. euphratica had the highest ash content, while P. sylvestris var. mongolica had the lowest. Their values were 2. 34% and 0.29% , respectively. On the aspect of life form, the average caloric value of thirty-four arbor species was 18. 256 kJ・g. 1, and that of sixteen shrubs was 18. 335 kJ・g. 1. The carbon contents of arbors and shrubs were 48.86% and 48.87% , and the ash contents were 0.82% and 0.81%, respectively. There were no significant differences in the caloric values, carbon contents and ash contents between arbors and shrubs （ P 〉 0. 05 ）. There was highly significantly positive correlation between the caloric values and carbon contents （P 〈 0.01 ） , and there was no significant correlation between the caloric values ＆ ash content and the carbon content ＆ ash content （P 〉 0.05）. The 50 tree species had been classified into four categories by cluster analysis. C. intermedia and P. sylvestris var. mongolica belonged to high caloric value and carbon content plants. L. ruthenicum, Euonymus alatus, Syringa oblata, Pyrus betulaefolia, Elaeagnus angustifolia, H. rhamnoides, Morus alba and Prunus salicina were the intermediate caloric value and carbon content plants, which can be used as alternative trees. The other species had relatively low caloric values and carbon contents.