摘要
文章从丹东所辖各县区的落叶松人工林中随机抽取288株落叶松样本,对其胸径(D1. 3)和根径(D0.05)进行实测,采用多模型选优法建立了根径和胸径的相关数学模型。结果显示,选取的三项式、乘幂、指数和对数4个方程的相关指数均大于0. 90,其中三项式曲线方程拟合效果最佳。
In this paper, 288 larch samples were randomly collected from Larix gmelinii plantations in the counties under the jurisdiction of Dandong, and their DBH(D1.3) and the root diameter(D0.05) were measured and the mathematical models of root diameter and DBH were established by multi-model optimization method. The results show that the correlation index of the four equations of trinomial, exponentiation, exponent and logarithm are all greater than 0.90, among which the trinomi?al curve equation has the best fitting effects.
引文
[1]陈灵芝,马克平.生物多样性科学:原理与实践[M].上海:上海科学技术出版社,2001:93.
[2]崔州平.浅析落叶松的林学特性[J].内蒙古林业,2000(8):31-32.
[3]贾乃光.数理统计[M].中国林业出版社,1997.
[4]东方人华.Office2000中文版入门与提高[M].清华大学出版社,1999.
[5]张士利,王正力,苏振海,等.辽宁省主要树种组林分树高生长率模型的研究[J].辽宁林业科技,2008(03):25-27.
[6]孟宪宇.测树学[M].北京:中国林业出版社,2006.