| 不同生境下骆驼刺与花花柴生态化学计量学特征的比较 |
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| 引用本文： | 荆瑞雪,张波,郭平林,张志浩,黄彩变,曾凡江.不同生境下骆驼刺与花花柴生态化学计量学特征的比较[J].生态学杂志,2020(3):733-740. |
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| 作者姓名： | 荆瑞雪 张波 郭平林 张志浩 黄彩变 曾凡江 |
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| 作者单位： | 中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室;新疆策勒荒漠草地生态系统国家野外科学观测研究站;中国科学院大学 |
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| 基金项目： | 国家自然科学基金委-新疆联合基金重点支持项目(U1603233);中国科学院“西部青年学者”B类项目(2018-XBQNXZ-B-018)资助。 |
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| 摘 要： | 以塔克拉玛干沙漠南缘典型荒漠豆科植物骆驼刺(Alhagi sparsifolia)和菊科植物花花柴(Karelinia caspia)为对象,研究单一骆驼刺种群(LTC)、单一花花柴种群(HHC)及骆驼刺-花花柴群落(GSQL)中植物及土壤中碳(C)、氮(N)、磷(P)、钾(K)等养分的生态化学计量学特征。结果表明:骆驼刺-花花柴群落中土壤有效N(AN)、有效K(AK)含量及N∶P、N∶K显著高于单一花花柴种群;骆驼刺-花花柴群落中花花柴叶片的全N含量显著高于单一花花柴种群,骆驼刺-花花柴群落中骆驼刺叶片的全P含量显著高于单一骆驼刺种群。相关性分析显示:不同生境土壤的AK含量与N∶P及AN含量呈显著正相关,而与SOC呈负相关;不同生境下叶片中的全K含量与SOC、全N、全P含量呈显著正相关,叶片中的全N含量与SOC、全P亦呈显著正相关,而N∶P与SOC、全P含量呈显著负相关;土壤中SOC含量与叶片中全P、全K含量呈正相关,而与N∶K呈负相关;土壤有效N含量与叶片N∶K呈正相关,而与叶片4种元素含量均呈显著负相关;土壤有效K含量与叶片中4种元素含量均呈显著负相关,而与叶片N∶K呈正相关;土壤N∶P、N∶K则分别与叶中全C、全P、全K呈显著负相关。综合分析认为:相较于单一种群,骆驼刺与花花柴的群落能够在一定程度上提高土壤养分,改善植物的营养状况,显示出豆科植物骆驼刺在群落演替中重要作用。
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| 关 键 词： | 荒漠生态系统 豆科植物 生物固氮 养分利用 |
The ecological stoichiometric characteristics of Alhagi sparsifolia and Karelinia caspia in different habitats |
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| JING Rui-xue,ZHANG Bo,GUO Ping-lin,ZHANG Zhi-hao,HUANG Cai-bian,ZENG Fan-jiang.The ecological stoichiometric characteristics of Alhagi sparsifolia and Karelinia caspia in different habitats[J].Chinese Journal of Ecology,2020(3):733-740. |
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| Authors: | JING Rui-xue ZHANG Bo GUO Ping-lin ZHANG Zhi-hao HUANG Cai-bian ZENG Fan-jiang |
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| Affiliation: | (State Key Laboratory of Desert and Oasis Ecology,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumchi 830011,China;Cele National Station of Observation and Research for Desert-Grassland Ecosystems,Cele 848300,Xinjiang,China;University of Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | We investigated carbon(C),nitrogen(N),phosphorus(P)and potassium(K)ecological stoichiometric characteristics in plant and soil of Alhagi sparsifolia population(LTC),Karelinia caspia population(HHC)and A.sparsifolia-K.caspia community(GSQL)in the south rim of the Taklimakan Desert.The results showed that the concentrations of available N(AN),available K(AK),N∶P,and N∶K in GSQL soil were significantly higher than those in HHC soil.The concentrations of total N in GSQL leaves were significantly higher than those in HHC leaves,while the concentrations of total P in GSQL leaves were significantly higher than those in LTC leaves.Results of the correlation analysis showed that soil AK concentrations were positively correlated with N∶P and AN across different habitats,but negatively correlated with SOC concentrations.Across all the habitats,foliar K concentrations were positively correlated with SOC,total N and total P concentrations,respectively;foliar N concentrations were positively correlated with SOC and total P concentrations,while N∶P was negatively correlated with SOC and total Pconcentrations.The SOC concentrations were positively correlated with foliar P and K concentrations,but negatively correlated with N∶K.Soil AN concentrations were positively correlated with foliar N∶K,but negatively correlated with these four element concentrations in leaves.Soil AK concentrations were negatively correlated with these four element concentrations in leaves and positively correlated with N∶K in leaves.Soil N∶P and N∶K were positively correlated with the foilar total C,total P,total K concentrations,respectively.In brief,A.sparsifolia-K.caspia community can improve nutrient state of soil and plant compared with single-species population,suggesting the significance of leguminous species A.sparsifolia in community succession.Our results could provide scientific basis for the restoration of desert ecosystem in the south rim of the Taklimakan Desert. |
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| Keywords: | desert ecosystem leguminous plant biological nitrogen fixation nutrient utilization |
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