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. 2025 Mar 18;36(3):771-779.
doi: 10.13287/j.1001-9332.202503.005.

Status and potential of carbon sequestration of larch plantations in Liaoning Province, China

Yan-Song Zhang  1   2 , Mian Xia  1   2 , Wang-Ming Zhou  3 , Li Zhou  1   2 , Zhi-Chao Wu  1   2 , Lei Ding  4 , Huan-Ying Yong  5 , Da-Pao Yu  1   2
Affiliations

Status and potential of carbon sequestration of larch plantations in Liaoning Province, China

Yan-Song Zhang et al. Ying Yong Sheng Tai Xue Bao. .

Abstract
in English, Chinese

We analyzed the carbon sink status of different management modes of larch plantations in Liaoning Pro-vince using data from a second-class survey, and predicted the dynamics of carbon sink under different management modes by using tree ring data from sample plots. The main aim was to provide technical support for improving carbon sequestration capacity of larch plantations. The results showed that the maximum carbon densities of larch and Korean pine plantations were 70.24 and 63.33 t·hm-2, respectively. The carbon sequestration potential of current plantations was 11.66 Tg. With the cycle of forest management, carbon sequestration rates of larch (40 years) and Korean pine (80 years) plantations were 1.62 and 0.66 t·hm-2·a-1, respectively. The carbon maturity age of larch plantations was 22 years, and stopping the rotation at this age could increase carbon sequestration by 43.8%. Under the larch-Korean pine multi-storied forest model, it was best to plant Korean pine seedlings in 30-year-old larch plantations, and to remove larch trees between 45- and 50-year-old larch plantations. Compared to the larch continuous cropping model, it reduced accumulated stand carbon sink by 36.4% and increased stand carbon density by 18.1%. Under the larch-Korean pine-Fraxinus mandshurica multi-storied forest model, it was best to plant F. mandshurica seedlings in 60-year-old Korean pine plantations, and to selecting cut Korean pine trees in 130-year-old. It increased accumulated stand carbon sink by 2.6% than larch continuous cropping and by 28.1% than Korean pine continuous cropping, and increased stand mean carbon density by 12.6% than Korean pine continuous cropping. The multi-storied forest model could reduce soil carbon loss and maintain arbor and soil carbon sinks. Inducing larch plantations into Korean pine-broadleaf mixed forests would facilitate stand carbon density and carbon sink.

本研究利用辽宁省二类调查小班数据分析了辽宁省东部山区不同经营模式下落叶松人工林的乔木碳汇现状,并基于固定样地的树木年轮数据预测了不同经营模式乔木的碳汇动态,以期为未来落叶松碳汇提升提供技术支撑。结果表明: 辽宁省落叶松人工林和红松人工林的乔木最大碳密度分别为70.24 和63.33 t·hm-2,现有林乔木的固碳潜力为11.66 Tg;在经营周期内,落叶松人工林(40年)和红松人工林(80年)的固碳速率分别为1.62和0.66 t·hm-2·a-1。落叶松人工林的碳成熟林龄为22年,以此为轮伐期可提高碳汇43.8%。落叶松冠下栽植红松的复层林模式,以落叶松人工林30龄时冠下栽植红松,45～50龄时去除上层落叶松为最佳;该模式比落叶松连作模式的乔木累积固碳量减少了36.4%,但林分碳密度增加了18.1%。对于落叶松-红松-水曲柳复层林,在红松60龄时冠下栽植水曲柳,130龄时择伐红松经营最佳;该模式乔木的累积固碳量比落叶松连作模式高2.6%,比红松连作模式高28.1%,平均碳密度比红松连作高12.6%。复层林模式可减少土壤碳损失,持续维持乔木和土壤碳汇,落叶松人工林逐步诱导成红松阔叶混交林最有利于增加林分碳密度和增汇。.

Keywords: Korean pine; carbon sink dynamic; larch; management pattern; multi-storied stand.

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