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Pilodyn和Resistograph对湿地松活立木基本密度的评估(PDF/HTML)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2020年3期
Page:
142-148
Column:
研究论文
publishdate:
2020-06-05

Article Info:/Info

Title:
Estimation of wood basic density in a Pinus elliottii stand using Pilodyn and Resistograph measurements
Article ID:
1000-2006(2020)03-0142-07
Author(s):
DING Xianyin12 TAO Xueyu12 DIAO Shu1 LUAN Qifu1 JIANG Jingmin1
(1.Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou311400, China; 2.College of Forestry, Nanjing Forestry University, Nanjing210037, China)
Keywords:
Resistograph Pilodyn wood basic density non-destructive test
Classification number :
S722.3;S758.5
DOI:
10.3969/j.issn.1000-2006.201906026
Document Code:
A
Abstract:
Objective The vrood basic density is an important improved character to determine the wood quality of pine plantation. Pilodyn and Resistograph are non-destructive assessment tools for basic density of living trees. Establishment of basic density assessment model of Pinus elliottii based on two methods and comparison of the advantages and disadvantages of the two methods can be beneficial for estimating the basic density of living trees in breeding programms of Pinus elliottii. Method Eighty-four Pinus elliottii trees aged 24 years were measured at breast height using Pilodyn, Resistograph, and increment borer. Resistograph amplitudes (AE), width of each ring (RE), and P value were recorded by Resistograph and Pilodyn methods, respectively. Wood basic density (ρ) was determined by increment coring. Correlation analyses of Pilodyn P values, AE, RE and ρ were performed. Result Pilodyn P values were significantly negatively correlated with ρ (R =-0.30, P < 0.01). AE was positively correlated with ρ (R = 0.50, P < 0.001). The strength of the correlation of AE and Pilodyn P values increased from the 24th ring to the 10th ring and then decreased from 10th to the pitch, suggesting accurate estimation of ρ by Pilodyn measurements; however, prediction of wood density in trees with large diameters was poor. AE was positively correlated with ρ in general and produced a significant positive correlation (P<0.001) with ρ in rings produced from between 5 and 18 years of age. The correlation of AE and RE as measured using the Resistograph was positive between the 8th and the 20th rings, apart from the 12th ring; however, other coefficients of correlation of AE and RE were negative. No corresponding results were obtained using the Pilodyn. Conclusion The Resistograph and Pilodyn devices can be used to indirectly and non-destructively assess basic density of Pinus elliottii, and although the Resistograph is more accurate for estimating basic density of Pinus elliottii wood, the Pilodyn has advantages regarding ease of use. Basic density of Pinus elliottii is high in mature wood (older than 8 years) and is relatively low in young wood.

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Last Update: 2020-06-11