不同立地条件对毛竹力学性质的影响

Influence of Different Site Conditions on the Mechanical Properties of Phyllostachys pubescens Mazel ex H. delehaie

通过对江西省14个毛竹主产区毛竹力学性质的试验与研究,结果表明:不同的立地条件对竹材有一定的影响:土壤厚度对最大压缩力、最大剪切力、弯弹模量的影响差异显著;抗弯强度、抗拉强度、抗压强度和压缩模量受立地因子的影响很小;海拔、腐殖质厚、速效K和坡位对力学性质的影响并不明显。有机质和速效P对拉弹模量影响在F0．1水平差异显著;土壤厚度对抗剪强度影响在F0．1水平下显著差异;土壤厚度对最大压缩力、最大剪切力和抗弯弹性模量的影响在F0．05水平差异显著,母岩对最大剪切力在F0．1水平下达显著差异; 土壤质地对弯弹模量在F0.1水平下达显著差异;速效N和母岩对最大压缩力的影响在F0．1水平达显著,土壤厚度对其在F0．05水平达显著差异。

Mechanical properties of Phyllostachys pubescens in different site conditions in Jiangxi province were studied. The result showed that： the soll thickness had significant influence on the mechanical properties of the plants in the max pressure-force, the max shear-force and the anti-curved elastic modulus, whereas the anti-bending strength, the anti-extension strength, the anti-pressure strength and the anti-pressure elastic modulus showed a tiny variation in different site conditions. The elevation, humus thickness, effect K and the slope had little influence in the mechanical properties of the plants. The organic materials and effect P had significant influence on the property of anti extension elastic modulus at the level of F0. 1. The soil thickness had significant influence on the property of anti-shears strength at the level F0.1 and on the properties of max-pressure-force, max shear-force and the anti-curved elastic modulus at the level F0.05. The mother rock had significant influence on the property of max shear-force at the level of F0.1. The soil quality had significant influence on the property of anti-curved elastic modulus at the level of F0.1. The effect N and the mother rock had significant influence on the property of max pressure at the level of F0.1, and so did the soil sickness at the level of F0.05.