子午岭辽东栎林内植物与土壤碳氮磷化学计量特征

aking three different ages of Quercus liaotungensis forest in Ziwuling of Loess Plateau as the object，the content of C, N and P in plant ,litter and soil were determined to analyze the variation of the stoichiometric ecology characteristics among different plants organs, litter and soil. The results showed that there were significant difference between the content of C, N and P on different plants organs in 245.3 ~ 492.6 g kg 1, 1.57 ~ 20.6 g, kg - 1 and 0.11 ~ 1.63 g, kg - 1, respectively, litter in 283.5 ~ 329.0 g kg 1, 1, 11.5 ~ 13.2 g, kg - and 0.73 ~ 1.06 g, kg - 1 respectively. With the increase of the forest age, there was no significant difference between the content of C on plant. However, there was obvious various among the content of N and P on plant,the content of C,N,P on litter and soil. C: N and C: P on plant leaves had a significant increase trend, N: P had a decreasing trend after increase first,C:N,C:P,N:P on litter had a significant increase trend,C:N in soil had a significant decreasing trend, C: P had a decreasing trend after increase first,and there was no significant difference between N: P. The content of N and P on plant and soil had a significant linear positive correlation respectively, and it showed that the supply of N and P on soil affected the content of N and P in plant.