Study on Growth Regularity and Economic Benefit of 10-year-old Eucalyptus urophylla × E. grandis DH32-28 Sprout Plantations
This study used field surveys and regression analysis to examine the growth patterns and economic benefits of 10-year-old Eucalyptus urophylla × E. grandis DH32-28,aiming to provide insights for the management of E. urophylla × E. grandis DH32-28 plantations. The findings revealed that at 10 years of age,E. urophylla × E. grandis DH32-28 achieved a height of 27.8 m,a diameter at breast height (DBH) of 18.64 cm,and individual tree volume of 0.301 m3. Height growth peaked in the 6th year with an increment of 1.32 m,while the maximum growth in DBH and individual tree volume occured in the 8th year,with increments of 0.68 cm and 0.030 m3,respectively. The height distribution was characterized by a right-skewed normal distribution,whereas the diameter distribution was left-skewed. The optimal model for the height-diameter growth curve was given by y=0.001x3-0.113x2+3.446x-4.579. The 8th year was identified as the period with the highest growth in individual tree volume,stand volume per unit area,and timber of specific dimensions. In the 10th year,the individual tree volume,stand volume per hectare,and timber yield reached 0.301 m3,389.304 m3·hm-2,and 235.750 m3·hm-2,respectively. Based on current market prices,the total sales revenue could reach 183885.00 yuan·hm-2.
Eucalyptus urophylla × E. grandis DH32-28growth regularityeconomic benefitgrowth model
万方数据
维普
