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对贺兰山东麓天然灰榆疏林林分进行了调查研究。实测灰榆单株的地上和地下生物量,应用相关分析方法,探讨灰榆单株各器官生物量与树高(H)、胸径(D)、1/2树高处直径(D1/2)和胸径平方乘树高(D2H)的相关关系,结果表明:1)贺兰山东麓天然灰榆疏林单株各器官生物量分配比率为树干>树根>树枝>树皮>树叶。2)各器官生物量拟合的预测模型中,树干、树枝和树叶的生物量预测模型拟合效果较好,而且具有一定的实用价值;树枝和树皮的生物量预测模型拟合效果一般;任一自变量与单株生物量拟合的预测方程适用性均较好。
A survey was conducted on the natural gray elm forests in eastern foot of Helan Mountain. The aboveground biomass and underground biomass of single Ulmus pumila plantation were measured. Correlation analysis was used to analyze the relationship between biomass and plant height (H), diameter at breast height (D), diameter at height of 1/2 tree (D1 / 2) (DBH). The results showed as follows: 1) The biomass distribution ratio of individual organs of natural Ash Ulmus pumila plantation was the tree trunks> tree roots> tree branches> bark> leaves. 2) Prediction model of biomass biomass of various organs fitted well with biomass prediction model of tree trunk, branch and leaves, and had certain practical value. The biomass prediction model of tree branches and bark had a good fitting effect. The fitness of the prediction equation for any independent variable fitted to the biomass per plant is good.