不同生境下骆驼刺与花花柴生态化学计量学特征的比较

生态学杂志

不同生境下骆驼刺与花花柴生态化学计量学特征的比较

荆瑞雪^1,2,3,张波^1,2,3,郭平林^1,2,3,张志浩^1,2,3,黄彩变^1,2,3,曾凡江^1,2,3*

(¹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，乌鲁木齐 830011；²新疆策勒荒漠草地生态系统国家野外科学观测研究站，新疆策勒 848300； ³中国科学院大学，北京 100049)

出版日期:2020-03-10 发布日期:2020-03-10

The ecological stoichiometric characteristics of Alhagi sparsifolia and Karelinia caspia in different habitats.

JING Rui-xue^1,2,3, ZHANG Bo^1,2,3, GUO Ping-lin^1,2,3, ZHANG Zhi-hao^1,2,3, HUANG Cai-bian^1,2,3, ZENG Fan-jiang^1,2,3*

(¹State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumchi 830011, China; ²Cele National Station of Observation and Research for DesertGrassland Ecosystems, Cele 848300, Xinjiang, China; ³University of Chinese Academy of Sciences, Beijing 100049, China).

Online:2020-03-10 Published:2020-03-10

摘要/Abstract

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。

关键词: 草地蒸散发, 称重式蒸渗仪, 日变化规律, 黑河上游

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 P concentrations. 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.

Key words: weighting lysimeter, grassland evapotranspiration, diurnal variation., upper reach of the Heihe River

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.

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]. cje.

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