Study on Soil Fertility and Growth Status of Manglietia yuyuanensis Plantation Mixed with Phyllostachys pubescens

The study was carried out on soil fertility and the growth status of the transformed Manglietia yuyuanensis plantation mixed with Phyllostachys pubescens after the Cunninghamia lanceolata trees were selectively cut off which used to be mixed with the Manglietia yuyuanensis. The results indicated that the branch and foliage distribution of Manglietia yuyuanensis was obviously stratified, the Manglietia yuyuanensis tree species occupied the upper layer in the stand, indicating a reasonable stand structure and a higher species diversity. The growth rate of Manglietia yuyuanensis was high in the following 10 years, which could be cultivated for largesized timber. There were no significant differences in the average DBH, average tree height, and the average individual standing volume of Manglietia yuyuanensis in the following 10 years among three types of mixing treatments. However, there were significant differences in the average DBH, average tree height, average yield of bamboo shoot, and the average individual standing volume of Phyllostachys pubescens, and the results showed that RD and RC mixing type were better than the other in the subsequent decade. The mixed plantation of Manglietia yuyuanensis and Phyllostachys pubescens turned to be a closetonature forest type, which was labor saving, more adaptable to the mountainous site conditions, high efficient and able to promote the soil fertility. It was proposed to be extended and applied in hilly and mountainous areas in the central Asian tropical forest zone.