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1948年奥地利林学家毕特里希发明的角规测树方法,得到了世界各国广泛采用。目前,虽然角规工具种类和使用范围都有了很大的发展,但是测定林分蓄积量的方法还是多数采用断面积一元控制,蓄积量中的重要因子内含形高还是采用林区的平均值。由于林分之间树高级的差异,而大大降低了林小班蓄积量的实测精度,阻碍了角规测树法在作业设计中的应用。为了解决这个问题,我队自1965年以来设计一种由断面积和林分平均高二元控制的蓄积量角规。这种角规具有精度高,制造和使用方便等优点,深受测树
In 1948, Austrian forestry researcher Bettlich invented the angle measurement tree method, which has been widely adopted by all countries in the world. At present, although the types and use of angle gauge tools have been greatly developed, but the method of determining the amount of stand volume or the majority of cross-sectional area using a single control, the accumulation of an important factor in the shape of high or forest area using the average value. Due to the high level differences among the stands, the measured accuracy of the stockings in the forest is greatly reduced, which hinders the application of the angle gauge tree in job design. In order to solve this problem, our team has designed a stocking gauge that has been controlled by averaging two-way cross-sectional area and stand height since 1965. This angle gauge with high precision, manufacture and use of convenience, etc., deeply tested by trees