林业科学2026，Vol.62Issue(8)：55-70,16.DOI:10.11707/j.1001-7488.LYKX20260063
樟子松人工林土壤特性、根际效应及其影响因素
Soil Characteristics,Rhizosphere Effects and Their Influencing Factors in Pinus sylvestris var.mongolica Plantations
摘要
Abstract
[Objective]This study aims to reveal the spatiotemporal variations in soil nutrient properties and rhizosphere effects in Pinus sylvestris var.mongolica plantations with different forest ages in different introduction sites,in order to provide a scientific basis for their sustainable management.[Method]This study was conducted in P.sylvestris var.mongolica plantations with different stand ages(27-28,37-40,and 48-49 a)in Hulunbuir sandy land(HB),Horqin sandy land(HQ),and Mu Us sandy land(MU).The concentrations of carbon,nitrogen,and phosphorus along with their associated enzyme activities in both bulk and rhizosphere soils were comparatively analyzed to characterize the spatiotemporal variations in nutrient properties and rhizosphere effects,and to explore the primary environmental drivers.[Result]1)The soil nutrients and enzyme activities exhibited significant spatial heterogeneity,with similar distribution patterns observed between bulk and rhizosphere soils.HB exhibited the highest soil organic carbon,total nitrogen and available nitrogen,while HQ had the highest available phosphorus and acid phosphatase activity,and MU recorded the highest total phosphorus.The soil organic carbon and total nitrogen accumulated with stand age across all regions,and the acid phosphatase activity in bulk soil consistently increased with stand age.2)Rhizosphere effects varied among different soil properties.In the plantations of various introduction sites,the soil organic carbon and total nitrogen consistently showed positive rhizosphere effects,indicating nutrient accumulation around roots.The activity of enzymes associated with carbon and phosphorus cycling mostly exhibited significantly negative rhizosphere effects,while the activity of nitrogen-transforming enzymes showed significantly positive rhizosphere effects,suggesting that P.sylvestris var.mongolica plantations may experience stronger nitrogen limitation.3)Geographical location and climatic conditions were the dominant factors shaping the spatiotemporal differences in soil characteristics between bulk and rhizosphere soils.The factors explained more variance in soil characteristics than the rhizosphere effects.Variations in soil properties and their rhizosphere effects were primarily driven by the combined influence of geographical and climatic factors.[Conclusion]The soil properties in P.sylvestris var.mongolica plantations introduced from different regions exhibit significant spatiotemporal variations.The spatiotemporal patterns of soil characteristics and rhizosphere effects are jointly influenced by geographical location,climate,and plant growth,while stand age has a relatively weaker effect.关键词
樟子松/根际效应/土壤养分/土壤酶活性/林龄Key words
Pinus syivestris var.mongolica/rhizosphere effects/soil nutrients/soil enzyme activity/stand age分类
农业科技引用本文复制引用
李启研,赵珮杉,高广磊,丁国栋,张英..樟子松人工林土壤特性、根际效应及其影响因素[J].林业科学,2026,62(8):55-70,16.基金项目
京津冀环境综合治理国家科技重大专项(2025ZD1205105) （2025ZD1205105）
国家自然科学基金项目(32371962) （32371962）
新疆维吾尔自治区"天山英才"培养计划"科技创新团队"项目(2024TSYCTD0009). （2024TSYCTD0009）
