METHOD OF ANALYSIS OF RELATIVE TAPER OF BIRCH BUTT ON SLOPE OF RAVINE Russian patent published in 2014 - IPC G01N33/46 A01G23/00 

FIELD: agriculture.

SUBSTANCE: invention relates to dendrometry in the study of the relative taper of butt during the growth and development of trees, mainly birch, and can be used in quality phytoindication of areas and the development of measures to protect the land plots from water erosion, as well as in dendrometry monitoring of the development of ravine network taking into account the changes in the relative shape of butt of growing birch trees. The method for analysis of the relative taper of butt during the growth and development of birch growing on the slope of the ravine, is characterised by the fact that across the ravine the test area with trees is chosen, then the record trees are chosen on the plot, the height of the crown and the total height of the record trees is measured. At each record tree at the standard height of 1.3 m the diameter and simultaneously the perimeter of the trunk cross-section is measured. The butt of the tree is taken as a symmetrical geometric shape extending along the vertical axis of the record tree trunk. The height of the butt of each record tree is measured from the transverse butt cross-section on the root collar to a point of intersection of the vertical axis with the surface of the soil. Then from this point to the periphery of the butt on the lower side along the slope the half-perimeter of the lower cross-section of the butt is measured. After that, taking into account the local slope angle at each record tree the maximum height of the butt from the root collar of the trunk to the soil surface on the lower side along the slope at the butt is additionally measured. According to variety of measured birches the calculations of relative indices are made in the form of a shape factor of the cross-section of a tree trunk at a standard height of 1.3 m, the relative taper of the cross-section of a tree trunk from the root collar to the standard height of 1.3 m, the relative taper of the tree butt from the cross section at a height of the butt to the standard height over the tree root collar. Then, using the statistical modelling the connection between the parameters of the relative taper of the butt of birches growing on the slopes of the ravine is determined, with respect to the cross-section at the standard height and the slope angle.

EFFECT: method provides enhanced functional capabilities of analysis according to the relative taper of the butt of trees growing on the slope of ravine or hill, as well as improving the accuracy of measurement of birch below the root collar, from the standard height of the trunk of 1,3 m above the root collar of the tree to the surface of the slope of the ravine or hill.

6 cl, 12 dwg, 11 tbl, 1 ex