| 贵州高原型喀斯特次生林C、N、P生态化学计量特征与储量 |
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| 引用本文： | 刘立斌,钟巧连,倪健.贵州高原型喀斯特次生林C、N、P生态化学计量特征与储量[J].生态学报,2019,39(22):8606-8614. |
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| 作者姓名： | 刘立斌 钟巧连 倪健 |
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| 作者单位： | 浙江师范大学化学与生命科学学院, 金华 321004;中国科学院普定喀斯特生态系统观测研究站, 安顺 561000,中国科学院普定喀斯特生态系统观测研究站, 安顺 561000;中国科学院地球化学研究所环境地球化学国家重点实验室, 贵阳 550081,浙江师范大学化学与生命科学学院, 金华 321004;中国科学院普定喀斯特生态系统观测研究站, 安顺 561000;中国科学院地球化学研究所环境地球化学国家重点实验室, 贵阳 550081 |
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| 基金项目： | 国家重点研发计划项目（2018YFC0507203，2016YFC0502101，2016YFC0502304）；国家自然科学基金面上项目（31870462） |
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| 摘 要： | 选取贵州高原型喀斯特次生常绿落叶阔叶混交林为对象，对其生态系统各组分碳（C）、氮（N）、磷（P）生态化学计量特征进行了研究，并全面估算了其生态系统C、N、P储量。结果表明，N、P含量在各树种和各器官（干、皮、枝、叶）之间表现出较大的变异，而C含量在各树种和各器官之间变异较小。C/N和C/P表现为叶片最高，树干（乔木）/枝干（灌木）最低，N/P在各器官间差异不显著（P > 0.05）。凋落物和木质残体的N/P显著（P < 0.01）高于植物活体。土壤C、N、P含量均随土壤深度的增加而降低，最表层（0-10 cm）土壤的C、N、P含量及N/P显著（P < 0.05）高于深层土壤；C/N和C/P在各土层间差异不显著（P > 0.05）。高原型喀斯特次生常绿落叶阔叶混交林的生态系统C、N、P储量分别为172.42 Mg/hm2、5.24 Mg/hm2和1.19 Mg/hm2。大部分森林C（54.69%）、N（84.46%）、P（97.26%）存储于土壤中。与非喀斯特森林相比，喀斯特森林植物叶片N、P含量低，土壤C含量高，生态系统C、N、P储量低。
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| 关 键 词： | 生态化学计量 碳循环 喀斯特森林 植被恢复 西南地区 |
| 收稿时间： | 2018/5/31 0:00:00 |
| 修稿时间： | 2019/7/6 0:00:00 |
Ecosystem C: N: P stoichiometry and storages of a secondary plateau-surface karst forest in Guizhou Province, southwestern China |
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| LIU Libin,ZHONG Qiaolian and NI Jian.Ecosystem C: N: P stoichiometry and storages of a secondary plateau-surface karst forest in Guizhou Province, southwestern China[J].Acta Ecologica Sinica,2019,39(22):8606-8614. |
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| Authors: | LIU Libin ZHONG Qiaolian and NI Jian |
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| Affiliation: | College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China;Puding Karst Ecosystem Research Station, Chinese Academy of Sciences, Anshun 561000, China,Puding Karst Ecosystem Research Station, Chinese Academy of Sciences, Anshun 561000, China;State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China and College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China;Puding Karst Ecosystem Research Station, Chinese Academy of Sciences, Anshun 561000, China;State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China |
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| Abstract: | Carbon (C), nitrogen (N) and phosphorus (P) stoichiometry characteristics and storages of all components in a secondary plateau-surface karst evergreen and deciduous broad-leaved mixed forest in central Guizhou Province, southwestern China, are analyzed and estimated. Results show N and P concentrations vary greatly among species and organs. C/N and C/P are highest in leaf and lowest in stem. N/P shows no significant (P > 0.05) differences among organs. Litter and woody debris present significantly (P < 0.01) higher N/P than live vegetation. Soil C, N and P concentrations decrease with increasing soil depth. Soil C, N and P concentrations and N/P in the first top layer (0-10 cm) are significantly (P < 0.05) higher than those in deeper soils. C/N and C/P show no significant (P > 0.05) differences among soil layers. C, N and P storages of the entire forest are 172.42, 5.24 and 1.19 Mg/hm2, respectively. Most C (54.69%), N (84.46%) and P (97.26%) are stored in soils. Compared with nonkarst forests, the karst forest presents lower leaf C and N concentrations, higher soil C concentration and lower C, N and P storages. |
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| Keywords: | C:N:P stoichiometry C cycle karst forest vegetation restoration southwestern China |
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