Li Wei, Zheng Zi-cheng, Li Ting-xuan
Ying Yong Sheng Tai Xue Bao. 2015 Jan;26(1):9-16.
This study selected 4 tea plantations with different ages (12-15, 20-22, 30-33 and >50 year-old) located in Ya' an, Sichuan Province, China to investigate the distribution patterns of soil organic carbon (SOC), total nitrogen (TN) and total phosphorus (TP) , and to examine the ecological stoichiometric characteristics of C, N and P within soil aggregates. The results showed that the coefficients of variation of SOC, TN and TP were 17.5%, 16.3% and 9.4%, respectively in the 0-20 cm soil layer and were 24.0%, 21.0% and 9.2%, respectively in the 20-40 cm soil layer. The spatial variation of TP was lower than that of SOC and TN but there were significant positive correlations among them. SOC and TN were distributed in the small-size aggregates and both of them had the greatest values in the >50 year-old tea plantation, however, the distribution of TP was relatively uniform among aggregates and ages. The coefficients of variation of C/N, C/P, and N/P were 9.4%, 14.0% and 14.9%, respectively in the 0-20 cm soil layer and were 7.4%, 24.9% and 21.8%, respectively in the 20-40 cm soil layer. Variation of C/N was lower than that of C/P and N/P. Averaged C/P and N/P values in the small-size aggregates were higher than in aggregates of other sizes, and the maximum values were in the >50 year-old plantation. C/N, C/P and N/P had good indication for soil organic carbon storage.
本研究选取了位于中国四川省雅安市的4个不同树龄（12 - 15年、20 - 22年、30 - 33年和>50年）的茶园，以调查土壤有机碳（SOC）、全氮（TN）和全磷（TP）的分布模式，并研究土壤团聚体内碳（C）、氮（N）和磷（P）的生态化学计量特征。结果表明，在0 - 20 cm土层中，SOC、TN和TP的变异系数分别为17.5%、16.3%和9.4%；在20 - 40 cm土层中，变异系数分别为24.0%、21.0%和9.2%。TP的空间变异性低于SOC和TN，但它们之间存在显著正相关。SOC和TN分布在小粒径团聚体中，且在>50年树龄的茶园中含量最高，然而，TP在团聚体和不同树龄间的分布相对均匀。在0 - 20 cm土层中，C/N、C/P和N/P的变异系数分别为9.4%、14.0%和14.9%；在20 - 40 cm土层中，变异系数分别为7.4%、24.9%和21.8%。C/N的变异性低于C/P和N/P。小粒径团聚体中C/P和N/P的平均值高于其他粒径团聚体，且在>50年树龄的茶园中达到最大值。C/N、C/P和N/P对土壤有机碳储量具有良好的指示作用。
