Analyzing the impact of climate and management factors on the productivity and soil carbon sequestration of poplar plantations
Analyzing the impact of climate and management factors on the productivity and soil carbon sequestration of poplar plantations
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分析气候和管理因素对杨树人工林生产力和土壤固碳的影响
DOI：
10.1016/j.envres.2015.10.016
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发表时间：
2016
影响因子：
8.3
通讯作者：
Ruan Honghua
中科院分区：
文献类型：
--
作者：
Wang Dan;Fan Jiazhi;Jing Panpan;Cheng Yong;Ruan Honghua
研究气候和管理因素如何相互影响杨树人工林生产和土壤固碳是至关重要的。从同行评议的期刊文章中提取杨树地上净初级生产量（ANPP）、气候因子和管理因子，统计分析管理因子和气候因子对杨树地上净初级生产量（ANPP）的影响。利用已验证的机械模型（ED）对不同采伐轮作下的管理杨树人工林进行了案例模拟。荟萃分析表明，全球干物质MAI为6.3 Mg ha - 1yr - 1(n=641, sd=4.9)，欧洲、美国和中国分别为5.1 （n=292, sd=4.0）、8.1 （n=224, sd=4.7）和4.4 Mg ha - 1yr - 1（n=125, sd=3.2）。杨树MAI对GDD、降水量和种植密度均有显著响应，且与林龄呈二次关系。全球杨树产量低的原因可能是水分利用率、轮作长度和种植密度不理想。SEM将杨树生长速率的变化归因于气候而非管理效应。实例模拟表明，较长的轮作周期显著增加了土壤碳储量。本研究结果表明，单靠轮作周期管理因子对杨树人工林地上部生长和土壤固碳量有显著影响，有助于量化短轮作人工林长期固碳量。本研究结果对进一步开展杨树人工林可持续发展的研究、政策和管理决策具有指导意义。
It is crucial to investigate how climate and management factors impact poplar plantation production and soil carbon sequestration interactively. We extracted above-ground net primary production (ANPP), climate and management factors from peer-reviewed journal articles and analyzed impact of management factor and climate on the mean annual increment (MAI) of poplar ANPP statistically. Previously validated mechanistic model (ED) is used to perform case simulations for managed poplar plantations under different harvesting rotations. The meta-analysis indicate that the dry matter MAI was 6.3 Mg ha−1yr−1(n=641, sd=4.9) globally, and 5.1 (n=292, sd=4.0), 8.1 (n=224, sd=4.7) and 4.4 Mg ha−1yr−1(n=125, sd=3.2) in Europe, the US and China, respectively. Poplar MAI showed a significant response to GDD, precipitation and planting density and formed a quadratic relationship with stand age. The low annual production for poplar globally was probably caused by suboptimal water availability, rotation length and planting density. SEM attributes the variance of poplar growth rate more to climate than to management effects. Case simulations indicated that longer rotation cycle significantly increased soil carbon storage. Findings of this work suggests that management factor of rotation cycle alone could have dramatic impact on the above ground growth, as well as on the soil carbon sequestration of poplar plantations and will be helpful to quantify the long-term carbon sequestration through short rotation plantation. The findings of this study are useful in guiding further research, policy and management decisions towards sustainable poplar plantations.