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Scientia Silvae Sinicae ›› 2016, Vol. 52 ›› Issue (6): 108-114.doi: 10.11707/j.1001-7488.20160613

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Wood Physical and Mechanical Properties of American Black Walnut of Different Strains

Zhang Junpei1, Wang Zi2, Zhou Xianwu2, Zhao Rongjun2, Xu Huige3, Jia Zhiming3, Pei Dong1   

  1. 1. State Key Laboratory of Tree Genetics and Breeding Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration Research Institute of Forestry, CAF Beijing 100091;
    2. Key Laboratory of Wood Science and Technology of State Forestry Administration Research Institute of Wood Industry, CAF Beijing 100091;
    3. Forestry Bureau of Luoning County, Henan Province Luoyang 471700
  • Received:2015-12-17 Revised:2016-01-28 Online:2016-06-25 Published:2016-07-04
  • Contact: 裴东

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Abstract: [Objective] The physical and mechanical properties of American black walnut were compared among ten strains:Bi (J. nigra ‘Bill 81-143’), LZ (J. nigra ‘Wrights G-4’), PN (J. nigra ‘Peanut’), HR (J. nigra ‘Hare’), SQ (J. nigra ‘Thatcher’), BJ (J. hindsii), QY (J. hindsii×J. regia ‘Paradox’), DG (J. major), PM (J. nigra ‘Pammel Park#20’) and AQ (J. nigra ‘Osage County#1’).[Method] Using Excel, SPSS Statistics and Origin 7.5, a comparative analysis was carried out on the strategy of air-dry density,absolute-dry density,air-dry shrinkage, absolute-dry shrinkage, compression strength parallel to grain, modulus of rupture, modulus of elasticity and hardness (radial surface, cross section and tangential surface). [Result] The results showed that the air-dry density, absolute-dry density, air-dry shrinkage ratio of tangential to radial, absolute-dry shrinkage ratio of tangential to radial, compression strength parallel to grain, modulus of rupture, modulus of elasticity and hardness (radial surface, cross section and tangential surface) were ranged 0.613-0.754 g·cm-3, 0.575-0.708 g·cm-3, 1.4-1.8, 1.5-2.4, 30.8-37.1 MPa, 86.5-123.7 MPa, 9.63-16.13 GPa, 4880-7120 N, 5720-8030 N and 4920-7270 N, respectively. The maximum value of each straits were HR (0.754 g·cm-3), HR (0.708 g·cm-3), BJ (1.8), BJ (2.4), AQ (37.1 MPa), AQ (123.7 MPa), AQ (16.13 GPa), HR (7120 N), HR (8030 N) and SQ (7270 N). The minimum value of each straits were BJ (0.613 g·cm-3), BJ (0.575 g·cm-3), PN (1.4), PN (1.5), DG (30.8 MPa), BJ (86.5 MPa), DG (9.63 GPa), Bi (4880 N), LZ (5720 N) and Bi (4920 N).[Conclusion] The results showed that there were significant difference among strains in air-dry density, absolute-dry density, absolute-dry shrinkage in tangential and the shrinkage ratio of tangential to radial, compression strength parallel to grain, modulus of rupture, modulus of elasticity and hardness. Wood physical and mechanical properties of American black walnut in Henan was better than those of Manchurian walnut and Walnut, and was similar with the American black walnut in American. All the ten strains of American black walnut could be used as furniture wood. Moreover, AQ and HR were the best in all strains.

Key words: American black walnut, wood, physical and mechanical properties, different strains

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