半干旱地区杨树人工林有机碳储量空间分布特征

姚建忠

文章摘要

姚建忠.半干旱地区杨树人工林有机碳储量空间分布特征[J].林业调查规划,2026,51(4):79-84

半干旱地区杨树人工林有机碳储量空间分布特征

Spatial Distribution Characteristics of Organic Carbon Storage in Poplar Plantations in Semi-Arid Areas

DOI：

中文关键词: 半干旱地区杨树人工林有机碳储量空间分布林龄效应

英文关键词: semi-arid area poplar plantation organic carbon storage spatial distribution forest age effect

基金项目:2023年中央财政林木良种培育补助项目(2023GK-SX01).

作者	单位
姚建忠	山西省桑干河杨树丰产林实验局科技服务中心,山西朔州 036000

摘要点击次数: 90

全文下载次数: 29

中文摘要:

为分析半干旱地区杨树人工林有机碳储量空间分布特征,选择山西省朔州市某杨树人工林为研究对象,系统分析不同林龄(10、15、20、25、30 a)杨树人工林生态系统有机碳储量的空间分布特征及其驱动机制。结果表明,林龄显著影响杨树人工林生物量与碳储量。其中,乔木层生物量随林龄递增,30 a杨树林树干生物量达378. 47 t/hm²;草本层生物量则相反,10 a林分草茎生物量最高(11.89 t/hm²),30 a林分草根生物量最低(1.34 t/hm²);凋落物层生物量在25 a林分时达峰值28.36 t/hm²。生物量及碳储量占比均表现为乔木层>凋落物层>草本层。土壤有机碳质量分数随土层加深递减,0~20 cm表层最高,各林龄土壤有机碳储量以30 a林分最高。根据上述结果,建议结合当地实际情况,从持续优化碳汇、维持生物多样性、加强林下植被管理、提升系统碳韧性、实现表层土保护、优化林龄结构等途径入手,提升固碳潜力。

英文摘要:

To analyze the spatial distribution characteristics of organic carbon storage in poplar plantations in semi-arid areas, a poplar plantation in Shuozhou City, Shanxi Province was selected as the research object. The spatial distribution characteristics and driving mechanisms of organic carbon storage in the poplar plantation ecosystems with forest ages of 10, 15, 20, 25 and 30 years were systematically analyzed. The results showed that the forest age significantly affected the biomass and carbon storage of poplar plantations. The biomass of the arbor layer increased with forest age, and the trunk biomass of 30-year-old poplar reached 378.47 t/hm². By contrast, herb layer biomass presented a declining trend: the aboveground biomass of 10-year-old herb was the highest (11.89 t/hm²), while the root biomass of 30-year-old herb was the lowest (1.34 t/hm²). The biomass of the litter layer reached a peak of 28.36 t/hm² in 25-year-old plantations. The proportions of biomass and carbon storage followed the order: arbor layer > litter layer > herb layer. Soil organic carbon mass fraction decreased with increasing soil depth, with the maximum value observed in the 0-20 cm topsoil layer. Among all age groups, 30-year-old plantations possessed the highest soil organic carbon storage. Based on the results, this paper suggests that in light of the actual situation in Shuozhou City, Shanxi Province, efforts should be made to enhance the carbon sequestration potential by continuously optimizing carbon sinks, maintaining biodiversity, strengthening the management of undergrowth vegetation, improving the carbon resilience of the system, achieving surface soil protection, and optimizing the forest age structure.

查看全文查看/发表评论下载PDF阅读器

关闭