林分断面积生长率公式探讨

根据林分生长理论，结合原始调查数据，对林业生产中的3种断面积生长率理论公式Meyer式、Pressler式和张角式的特性作了进一步研究，并对3种方法作了具体验证。研究结果表明：3种断面积生长率计算方法有一定差异，当后期与前期平均断面积比值大于1.30时，Meyer方法计算断面积生长率高于其余两种方法，张角法则和Pressler法则十分接近，但张角法更有理论依据。

DISCUSSION ON THREE FORMULAS OF FOREST BASAL AREA GROWTH RATE

Based on the theory of forest growth and the primal investigation data, three formulas of forest basal area growth rate, the Meyer, the Pressler and the Angle, have been studied farther on their nature in this paper. The angle formulas has been tested concretely. The results showed: on condition of the basal area rate >1.30, there has a little difference in the three methods. The Meyer are bigger than the others. The Angle are quite close to the Pressler, but the former has the better bases on theory.;