Biomass and nutrient of fine-root in masson pine mixed forests
According to the proportion (0% ~20%,21%~40% ,41% ~60 % ,61% ~80% and 81% ~ 100% ) of masson pine in the mixedwoods, the biomass and nutrients of fine-root in different stands were analyzed. The results showed that the fine-root biomass in the surface soil layer was more than that in deeper soil. The contents of N, P and K of fine-root were decreased from the surface to deeper layer under the ground, and the storages of N, P and K of fine-root had similar trend. For different proportion masson pine mixed broad-leaved stands, the 41% ~60% masson pine mixed forest had the highest fine-root biomass. The results also showed that the highest contents of N and P.