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建立平均高和平均胸径的模型,对提高森林科学经营水平是很有必要的.本文根据野外山核桃种群调查资料,利用10种数学回归模型对山核桃种群的平均树高和平均胸径间的关系进行回归分析.结果表明:山核桃种群平均高和平均胸径之间存在显著的相关关系,以H=a+bD、H=a+bD+cD~2、H=a+bD+cD~2+dD~3和H=n+b/D 4种回归模型拟合的较好;经适用性检验,这4种回归模型适用度均比较高,但是,H=a+bD+cD~2和H=a+bD+cD~2+dD~3适合度最好,最具有代表性;不过,就精度而言,H=a+bD+cD~2最高,H=a+bD+cD~2+dD~3次之.这为在太岳林区开展山核桃种群群落结构研究,并进行森林经营和资源调查等提供重要的理论依据.
It is necessary to establish a model of average height and average breast diameter in order to improve the management level of forest science.Based on the field survey data of Hickory, the relationship between average tree height and average breast diameter of Hickory Populus using 10 mathematical regression models (H = a + bD, H = a + bD + cD ~ 2, H = a + bD + cD ~ 2 + The four regression models of dD ~ 3 and H = n + b / D fit well. The fitness of the four regression models is relatively high, but H = a + bD + cD ~ 2 and H However, in terms of accuracy, H = a + bD + cD ~ 2 is the highest, H = a + bD + cD ~ 2 + dD ~ 3 times.This provides an important theoretical basis for carrying out the research on the community structure of pecan tree in Taiyue Forest Area and conducting forest management and resource investigation.