角规测树在材积生长动态监测中应用理论与方法的研究

本文系统研究了水平角规在固定样点监测材积生长动态中的理论与方法；导出了采用保留木生长量计算林分断面积、蓄积生长量的新的计算公式，提出了以该方法为基础的角规测树的动态监测方法体系。结果表明，本文提出的理论方法不仅完善了传统方法而且克服了传统方法测定林分断面积、蓄积量零增长及跳跃现象。理论推导同时表明，采用变角规断面积系数方法与采用角规样点保留木生长量测算林分生长量的机理在理论上是一致的

STUDY ON THE APPLIED THEORY AND METHOD OF ANGLE MEASURING IN VOLUME GROWING ESTIMATION

This paper systematlly deals with the applied theory and method of angle measuring in volume growing estimation in permanent point sampling. A new estimator of basal area and volume increment is introduced by measuring reserved trees. Thus the new dynamic monitoring method of system is built based on the estimator. The results show that the methods suggested by author not only improve the traditional method but also eliminate the phenomenon of zero and jumping in the estimation of basal area and volume increment. Meanwhile the theoretical results also show the principle of methods no difference between varing angle ratio and measuring growth of reserved trees in Permanent point sampling.