Qi Guang, Wang Qing-Li, Wang Xin-Chuang, Yu Da-Pao, Zhou Li, Zhou Wang-Ming, Peng Shun-Lei, Dai Li-Min
Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110164, China.
Ying Yong Sheng Tai Xue Bao. 2013 Jan;24(1):10-6.
A sampling plot investigation was conducted to study the soil organic carbon (SOC) storage in 0-40 cm layer in 10-, 15-, 26- and 61 years old Larix gmelinii plantations in Great Xing' an Mountains of Northeast China as well as the temporal variation pattern of the SOC source/sink during the plantation management after the clear cutting of primary L. gmelinii forest. With the increasing age of the plantations, the SOC storage increased after an initial decrease, and the inflection point was at a stand age between 15- and 26-years old. Compared with that of primary forest, the SOC storage of the plantations played a role of carbon source at early stage (10-26 years old), but gradually transformed into carbon sink then, with a SOC storage of 158.91 t x hm(-2) in 61-year-old plantation. The SOC storage of the plantations increased with soil depth initially, but was higher in upper soil layer than in deeper soil layer after the stand age being 26, which implied that human disturbance had strong effects on the vertical distribution of SOC. It was considered that the appropriate cutting age for the L. gmelinii plantations in Great Xing' an Mountains could be at least 60 years old.
在中国东北大兴安岭地区，对10年、15年、26年和61年生的兴安落叶松人工林0-40厘米土层的土壤有机碳（SOC）储量进行了样地调查，并研究了原始兴安落叶松林皆伐后人工林经营过程中SOC源/汇的时间变化模式。随着人工林年龄的增加，SOC储量在经历初始下降后增加，拐点出现在15至26年生之间。与原始林相比，人工林的SOC储量在早期（10-26年生）起到碳源的作用，但随后逐渐转变为碳汇，61年生人工林的SOC储量为158.91 t·hm(-2)。人工林的SOC储量最初随土壤深度增加，但林龄达到26年后，上层土壤中的SOC储量高于深层土壤，这表明人为干扰对SOC的垂直分布有强烈影响。研究认为，大兴安岭兴安落叶松人工林的适宜采伐年龄至少应为60年。
