Development of tending techniques to control the heartwood formation of the stems Japanese larch (Larix leptolepis Gord.)
1996
Takei, F. (Nagano-ken. Forest Experiment Station, Shiojiri (Japan))
In the previous paper, the author reported the relationship between an Lgi for the basal area annual growth increment and an L-gs for the sapwood basal area as an indicator of the distribution patterns along the stem. Using this L-gi, this study was made to get a silvicultural handling chart for given heartwood volume ratios. (1) The clear length estimation of the Japanese larch stands was made by using the relationship between relative spacing (S/H) (S: Mean spacing, H: Dominant tree height) and S/Hb (Hb: Clear length). (2) Using the foliage biomass estimation formula, an L-gi estimation was made for every clear length ratio class. (3) Finally, it was possible to get a silvicultural handling chart for given heartwood volume ratios in the stem
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