Effects of tree vigor, competition and stand conditions on branch diameter for mixed plantations of Fraxinus mandshurica Rupr. and Larix olgensis Henry in Northeast China

Zou, Xinyang; Miao, Zheng; Hao, Yuanshuo; Liu, Xin; Dong, Lihu; Li, Fengri

doi:10.1007/s10342-024-01681-1

Eur J Forest Res

2024

DOI: 10.1007/s10342-024-01681-1

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Effects of tree vigor, competition and stand conditions on branch diameter for mixed plantations of Fraxinus mandshurica Rupr. and Larix olgensis Henry in Northeast China

Xinyang Zou,

Zheng Miao,

Yuanshuo Hao

et al.

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Cited by 2 publications

References 73 publications

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Modeling tree radial growth with competition and crown characteristics from an aerial perspective

Liu,

Li,

Hao

et al. 2025

Forest Ecology and Management

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Modeling tree radial growth with competition and crown characteristics from an aerial perspective

Liu,

Li,

Hao

et al. 2025

Forest Ecology and Management

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Biomechanical Analysis of Camellia oleifera Branches for Optimized Vibratory Harvesting

Pan,

Wan,

et al. 2024

Agriculture

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To investigate the biomechanical properties of Camellia oleifera branches under two loading speeds within a specific diameter range, three-point bending tests were conducted using a universal material–testing machine. The tests were performed at loading speeds of 10 mm/min and 20 mm/min on branches with diameters ranging from 5 mm to 40 mm. This study aims to provide insights into the design of a manipulator gripper used in a vibrating harvester for Camellia oleifera fruit. Four main varieties of Camellia oleifera were tested to determine their elastic modulus. The nonlinear least squares method, based on the hyperbolic tangent function, was employed to fit the bending load–deflection curves of the branches. This process constructed multi-parameter transcendental equations involving elastic modulus, diameter, and loading speed. Results indicated that the branches of four Camellia oleifera varieties exhibited significant differences in their biomechanical properties, with their modulus of elasticity ranging from 459.01 MPa to 983.33 MPa. This suggests variability in the bending performance among different varieties. For instance, Huaxin branches demonstrated the highest rigidity, while Huashuo branches were softer in general. For the proposed empirical fitting equations, when the fitting parameter k is 168 ± 20 and the parameter c is 3.102 ± 0.421, the bending load–deflection relationship of the branches can be predicted more accurately. This study provides a theoretical basis for enhancing the efficiency of mechanized vibratory picking of Camellia oleifera and optimising the design of the gripper.

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Effects of tree vigor, competition and stand conditions on branch diameter for mixed plantations of Fraxinus mandshurica Rupr. and Larix olgensis Henry in Northeast China

Cited by 2 publications

References 73 publications

Modeling tree radial growth with competition and crown characteristics from an aerial perspective

Modeling tree radial growth with competition and crown characteristics from an aerial perspective

Biomechanical Analysis of Camellia oleifera Branches for Optimized Vibratory Harvesting

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