Scientia Silvae Sinicae ›› 1999, Vol. 35 ›› Issue (5): 94-98.
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Xuebiao Yu1,Weidong Yang2,Jinhua Yang1,Chunyan Lu1
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Abstract:
Research results showed that the index of breast height form factor, form quotient and H/DBH ratio increased and the taper of stem decreased, with continuous-plating rotation(CPR) increasing, which indicated that the full form index of the standing stem was much better with the CPR increasing and benefited to obtain the outturn percent.In addition, the specific gravity of wood (SGW) decreased with the tree height increasing.SGW and the length of wood fibre increased with CPR increasing.SGW of the 2nd, 3rd and 4th rotation increased by 7.3 %, 12.4 % and 15.8 %, respectively, compared with the 1st rotation.The stem outturn percent of the 2nd, 3rd and 4th rotation increased by 15.5 %, 20.7 % and 20.3 %, respectively, compared with the 1st rotation.In general, the wood quality was improved with CPR increasing.
Key words: Continuous-planting, Eucalyptus, Wood properties
Xuebiao Yu,Weidong Yang,Jinhua Yang,Chunyan Lu. STUDY ON MAIN WOOD PROPERTIES OF EUCALYPTUS 12 ABL W5 WITH DIFFERENT CONTINUOUS-PLANTING ROTATION[J]. Scientia Silvae Sinicae, 1999, 35(5): 94-98.
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Table 1
Variance of breast height form factor, form quotient and taper in different rotations"
Table 2
Variance of H/ DBH ratio and tree variability in different rotations"
Table 3
Variance of specitic gravity of wood in different rotations"
Table 4
Horizontal variance of wood fibre length of eucalyt in different rotations"
Table 5
Vertical variance of wood fibre length in different rotations"
Table 6
Comparison of outtern and bark percentage in different rotations"
