This article analyzed the biomass, ash contents, calorific values of dry weight and the deashing dry weight of four 5-year-old locust clones, such as 3-1, Robinia pseudoacacia, ' Yuciyihao' , Hungary tetraploie and common locust (CK) in Shan county, Henan Province. The results showed that the calorific values per dry mass and the deashing dry mass of clones were between 3 750 -3 950 and 3 800 -4 000 kcal·kg-1 , respectively (the order was :3-I > CK > R. pseudoacacia ' Yuciyihao' > Hungary tetraploie) . The calorific values of the different parts were between 3 800 - 3 960 and 3 840 -4 000 kcal-kg , respectively (the order was; middle portion of stem > branches > upper portion of stem > lower portion of stem ) . The calorific value of the dry mass and the deashing per the individual plant's branch or trunk were between 10 900 -35 000 and 11 000 - 35 500 kcal·tree-1 respectively, with the same order as the branch-trunk total biomass, that is, (Robinia pseudoacacia 'Yuciyihao' > 3-1 > CK > Hungary tetraploie ). In comprehensive analysis of the caloric value, ash contents and biomass, R. pseudoacacia ' Yuciyihao' would be the ideal clone which can be selected for energy cultivation, followed by 3-1, and the middle trunk would be the ideal part for energy, followed by branches.%对河南省陕县5年生的3-I、豫刺槐1号、匈牙利四倍体、一般刺槐(CK)4个刺槐无性系的生物量、灰分含量、干质量热值和去灰分热值进行分析.结果表明:无性系间单位干质量热值和去灰分热值差异显著,分别在3 750 ～3 950 kcal·kg-1与3 800 ～4 000 kcal· kg -1之间,高低排序均为3-I ＞CK＞豫刺槐1号＞匈牙利四倍体；部位间单位干质量热值和去灰分热值差异显著,分别在3 800～3 960 kcal·kg-1与3 840 ～4 000 kcal·kg-1之间,高低排序均为树干中部＞树枝＞树干上部＞树干下部；无性系间单株枝干干质量热值和去灰分热值差异显著,分别在10 900 ～ 35 000 kcal与11 000～35 500 kcal之间,无性系间单株枝干热值排序与枝干总生物量排序一致,均为豫刺槐1号＞3-I＞CK＞匈牙利四倍体.综合热值、灰分含量和生物量分析,对刺槐进行能源林经营的品种选择是有效的,无性系豫刺槐1号选做能源刺槐树种栽培最为理想,3-I次之；树干中部为理想能量部位,树枝次之.
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