文献类型：期刊文献

中文题名：喀斯特区与非喀斯特区不同人工林植物叶片和土壤化学计量特征

英文题名：Stoichiometric characteristics of plant leaves and soils in different plantations in karst and non-karst areas

作者：苏利利[1] 刘紫泓[1] 唐夫凯[2] 万龙[1] 杨晓荣[1] 刘玉国[3] 刘益洋[1] 耿昕楠[1]

第一作者：苏利利

机构：[1]北京林业大学水土保持学院云南建水荒漠生态系统国家定位观测研究站,北京100083;[2]生态环境部南京环境科学研究所,北京210042;[3]中国林业科学研究院生态保护与修复研究所,北京100091

年份：2025

卷号：23

期号：3

起止页码：176-186

中文期刊名：中国水土保持科学

外文期刊名：Science of Soil and Water Conservation

收录：;北大核心:【北大核心2023】；

基金：国家重点研发计划“岩溶山地蓄水保墒及水资源高效利用技术”(2024YFD2200503);北京市级大学生创新创业训练项目“基于氢氧同位素和水化学示踪剂的喀斯特地区水分滞留时间估算”(S202410022034);北京林业大学“5·5工程”科研创新团队项目(BLRC2023B09);中央级公益性科研院所基本科研业务费专项资金“喀斯特森林植物群落物种共存机制研究”(CAFYBB2021MA013)。

语种：中文

中文关键词：人工林;土壤;植物叶片;化学计量特征;喀斯特

外文关键词：artificial forest;soil;plant leaves;stoichiometric characteristics;karst

分类号：S718.5;S791

摘要：以滇南地区空间邻近的喀斯特区和非喀斯特区不同人工林(桉树和云南松)为研究对象,分析4个样地(喀斯特区桉树林、喀斯特区云南松林、非喀斯特区桉树林和非喀斯特区云南松林)植物叶片和土壤养分质量分数及生态化学计量特征,解析喀斯特区与非喀斯特区的生境差异及两种地质背景下人工林地上和地下养分的相互关系。结果表明:1)喀斯特区林地土壤有机碳(SOC)、全氮(TN)、全磷(TP)质量分数显著高于非喀斯特区林地;喀斯特区桉树林土壤SOC、TN、TP质量分数显著高于云南松林;而喀斯特区桉树林土壤C∶N和C∶P显著低于非喀斯特区;云南松林的土壤则呈现相反趋势。这表明喀斯特区林地土壤保持养分能力更强,不同人工林对土壤养分的利用效率存在差异。2)非喀斯特区林地叶片N和P质量分数显著高于喀斯特区,且喀斯特区林地叶片N∶P均大于16,说明喀斯特区林地呈现P限制。3)喀斯特区与非喀斯特区林地植物表现出不同的养分获取和利用策略,土壤养分状况是决定植物叶片养分利用.效率的关键因素。研究表明,桉树林和云南松林在不同地质背景中土壤–植物之间存在养分耦联性差异。因此进行人工林营造时,应综合考虑不同树种在不同地质背景区的养分利用状况和营养元素分配结构,以优化植被恢复及管理策略。
[Background]Vegetation restoration is an important measure for ecological governance in southwestern China.Ecological degradation may occur in both karst or non-karst areas,where significant differences exist in habitat conditions,soil and plant nutrient characteristics,and plant responses to soil properties.However,there is currently a lack of research comparing soil and plant characteristics across between different vegetation restoration models in karst and non-karst areas.Ecological stoichiometry is a discipline that examines the balance of energy and element within ecosystems.Carbon,nitrogen,and phosphorus are key components of nutrient cycling between plants and soil and are central topics in ecological stoichiometry.[Methods]Different artificial forests(Eucalyptus maideni and Pinus yunnanensis)in spatially adjacent karst and non-karst areas of southern Yunnan province were selected as the research objects.The research analyzed the nutrient contents and ecological stoichiometric characteristics of plant leaves and soil in four sample plots(KE,KP,NE and NP),to determine the habitat differences between karst and non-karst areas,and the interrelationship of aboveground and underground nutrients in the artificial forests under two geological backgrounds.[Results]1)The contents of soil organic carbon(SOC),total nitrogen(TN)and total phosphorus(TP)in karst forests were significantly higher than in non-karst forests.The SOC,TN,and TP contents were higher in KE than in KP.The soil C∶N and C∶P ratios of KE were significantly lower than in NE,while these indicators showed the opposite trend between KP and NP.The above results indicated that forest soils in karst areas had a stronger capacity to retain nutrients,there were species-specific differences in nutrient use efficiency.2)The leaf nitrogen(N)and phosphorus(P)contents in non-karst forests were significantly higher than those karst forests.Additionally,the leaf N∶P ratio in karst forests exceeded 16,indicating forests were limited by phosphorus in karst areas.3)Forests adopt different nutrient acquisition and utilization strategies depending in karst and non-karst areas,and soil.nutrient status was the key factor determining of leaf nutrient use efficiency.[Conclusions]The study reveals differences in soil–plant nutrient coupling in E.maideni and P.yunnanensis forests under different geological backgrounds.Therefore,afforestation efforts should consider species-specifice nutrient utilization and allocation structure in different geological background areas to optimize vegetation restoration and management strategies.