Roads have influence on flora, fauna and ecosystems to some extent. In order to ascertain the impacts of roads on the growing status of diet bamboo of pandas, 177 quadrats (1m×1m) were sampled by the different distances from the road to measure the height, basal diameter, and the density of Fargesia nitida and other environmental factors such as herbage height, moss coverage and humus coverage in the habitats of the Giant Panda in Jiuzhaigou County in 2014. The results showed that in 5 gradients which defined by vertical distance from roads under 500m, there are no significant differences in average height and basal diameter of F. nitida except average density; in 5 gradients under 100m, there are no significant differences in all these three factors. The average height, basal diameter and density are not significantly positively correlated to the distance from the road. The height was correlated to the herbage height, moss coverage and humus coverage significantly; the basal diameter was correlated to moss thickness significantly; and the density was correlated to the upper vegetation coverage and herbage coverage significantly, which illustrate that the growing status of Fargesia nitida was mainly affected by multiple environmental factors. Even though the road operation has no significant effect on the growth conditions of Fargesia nitida, still, the bamboos near the road are severely damaged by deforestation, as well as gnawing and trample of livestock that mainly brought by roads.
