Study on the Formation Law of Knot Scar in Quercus mongolica Plantation Based on Industrial CT Scanning Technology
Interpret and analyze the acquired images of the standard trees in 5 planting densities of Quercus mongolica plantation builded in 1999 in Dailing Forestry Bureau scanned by industrial CT.The following conclusions were obtained:Industrial CT can not only accurately extract the number and spatial location information of knots,but also retrospect the whole formation process of knot scar in Quercus mongolica plantation.The number of knots formed has a certain correlation with competition index and climate conditions:the greater the competition index,the more the number of knot scar and encapsulated knots in Quercus mongolica plantation,and vice versa.The increase of annual average temperature reduces the number of knots of Quercus mongolica;the increase of annual rainfall increases the number of knots of Quercus mongolica Forest;the years with late frost occurring later and early frost occurring earlier,the number of knots of Quercus mongolica will increase.The conclusion can provide theoretical support for the cultivation and management of large diameter knotless good material of Quercus mongolica plantation.
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