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地埂花椒林根系水平分布呈现出阶梯型分布 ,其中 2 0～ 15 0 cm为集中分布区 ,占总根重的 70 % ,15 0～ 2 10cm为次集中分布区 ,占总根重的 2 2 .72 % ,2 10～ 2 5 0 cm为根系的少量分布区 ,占总根重的 7.2 8% ,根系的垂直分布呈现“V”字型分布 ,其中 0～ 6 0 cm为根系集中分布区 ,在该土层中 ,0～ 2 0 cm土层根系分布最多 ,密度最大。在 0～6 0 cm土层中 ,<1m m根集中分布于 0～ 2 0 cm土层中 ,占总根长的 5 6 .73% ,且随深度的增加 ,其数量大幅度减少 ,1～ 3mm根随深度的增加趋于减少 ,但减少幅度较小 ,>3mm根随深度的增加而增加。地埂花椒林根系随树龄的增加 ,根系增粗明显 ,根系总量增加。根系拉力与根径呈线性相关 ,在整个根系中 ,>3mm根是抗拉力的主体 ,占总拉力的 5 9.35 % ,其次是 <1m m根 ,占总拉力的 2 3.6 3% ,1～ 3m m根最小 ,占总拉力的 17.12 %。抗剪强度 ,<1mm根最大 ,占总抗剪强度的 72 .37% ,其次是 >3m m根 ,占总抗剪强度的 19.0 9% ,1～ 3mm根最小 ,占总抗剪强度的 8.5 4%。
The root distribution of Zanthoxylum schinifolium L. showed a ladder-type distribution, of which 20 ~ 150 cm was the concentration distribution area, accounting for 70% of the total root weight, and 150 ~ 210 cm as the secondary concentration distribution area, accounting for 2 2 .72%, 2 10 ~ 250 cm as the root distribution area, accounting for 7.28% of the total root weight. The vertical distribution of the root system showed “V” shape distribution, of which 0 ~ 60 cm was the root distribution In this area, the 0 ~ 2 0 cm soil layer has the most root distribution and the highest density. In the 0 ~ 600 cm soil layer, <1 m m roots were concentrated in the 0 ~ 200 cm soil layer, accounting for 56.73% of the total root length, and the number decreased significantly with the increase of depth The root of ~ 3 mm tended to decrease with the increase of depth, but the decrease was smaller. The root of> 3 mm increased with the increase of depth. With the increase of tree age, root system of Zanthoxylum bungeanum increased root thickening and total root system increased. Root tension was linearly related to root diameter. In the whole root system,> 3mm root was the main body of tensile strength, accounting for 5 9.35% of total pulling force, followed by <1m m root, accounting for 23.63% of total pulling force, 3m m root minimum, accounting for 17.12% of the total pull. The shear strength was the largest at <1 mm, accounting for 72.37% of the total shear strength, followed by> 3 m m, accounting for 19.0 9% of the total shear strength and 1 to 3 mm at the minimum, accounting for 8.5% of the total shear strength 4%.