COMPARATIVE STUDY OF WOOD PROPERTIES BETWEEN WHITE WOOD OF DAHURIAN LARCH AND MONGOLIAN SCOTCH PINE

摘要

The comparative result shows that the physical and mechanical properties of wood between white wood of Dahurian larch (Larix gmelini (Rupr.) Rupr.) and Mangolian scotch pine (Pinus sylvestris var. mongolica) are different. Some differences are very conspicuous, (e. g. compres-sive strength parallel to grain, modulus of elasticity in static bending, toughness and bending strength etc.),and others are slightly conspicuous or not conspicuons,(e.g. shrinkage, differential shrinkage and shearing strengthparallel to grain etc.). The properties of white wood of Dahurian larch are suitable weight and soft texture, median slrengtlynedian shrinkage and good in workability, while which of Mongolian scotch pine are light and soft nearly very soft, weak strength, median shrinkage are good in workability. However, the white wood of Dahuran larch is superior to the Mongolian scotch pine in strength-to-weight ratio.ll is a valuable timber tree.