喀斯特峰丛洼地不同森林类型植物和土壤C、N、P化学计量特征

应用生态学报

喀斯特峰丛洼地不同森林类型植物和土壤C、N、P化学计量特征

俞月凤^1,2,3,彭晚霞^1,2,宋同清^1,2**,曾馥平^1,2,王克林^1,2,文丽^1,2,3,范夫静^1,2,4

(¹中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室, 长沙 410125; ^2中国科学院环江喀斯特生态系统观测研究站, 广西环江 547100; ^3中国科学院大学, 北京 100049; ⁴江西农业大学, 南昌 330045)

出版日期:2014-04-18 发布日期:2014-04-18

Stoichiometric characteristics of plant and soil C, N and P in different forest types in depressions between karst hills, southwest China.

YU Yue-feng^1,2,3, PENG Wan-xia^1,2, SONG Tong-qing^1,2, ZENG Fu-ping^1,2, WANG Ke-lin^1,2, WEN Li^1,2,3, FAN Fu-jing^1,2,4

(¹Key Laboratory of Agroecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; ²Huanjiang Observation and Research Station of Karst Ecosystem, Chinese Academy of Sciences, Huanjiang 547100, Guangxi, China; ³University of Chinese Academy of Sciences, Beijing 100049, China; ⁴Jiangxi Agricultural University, Nanchang 330045, China)

Online:2014-04-18 Published:2014-04-18

摘要/Abstract

摘要：

研究西南喀斯特峰丛洼地人工林、次生林、原生林3个不同森林类型的6个代表性植物群落C、N、P化学计量特征及其与土壤的关系.结果表明: 不同森林类型植物和土壤C、N、P含量均存在显著差异.土壤C和N含量均为次生林最高,人工林最低,土壤P含量为人工林最高,原生林最低;植物C和P含量变化趋势为人工林>原生林>次生林,植物N含量为次生林最高,原生林最低.土壤C∶P、N∶P以及植物C∶P均为原生林显著高于次生林和人工林,土壤C∶N在不同森林类型间差异不显著;植物N∶P为次生林最高,人工林最低,植物C∶N为原生林>人工林>次生林.在不同森林类型中,乔木叶片N含量与P含量、C∶N与C∶P以及C∶P与N∶P之间均呈显著线性正相关,除了植物叶片C∶N与N∶P以及土壤C∶N与N∶P之间呈显著线性负相关外,植物和土壤的C、N、P、C∶P均无显著相关性,说明土壤C、N、P供应量对乔木叶片C、N、P含量影响不大.

Abstract: The stoichiometric properties of plant carbon (C), nitrogen (N) and phosphorus (P) and their relationships with soil were studied in six dominant plant communities in three forest types, i.e., plantation forest, secondary forest and primary forest in depressions between karst hills, southwest China. The C, N and P contents of both plant and soil had significant differences among the different forest types. Soil C and N contents were the highest in the secondary forest and the lowest in the plantation forest. Soil P content was the highest in the plantation forest and the lowest in the primary forest. Plant C and P contents were in the order of plantation forest > primary forest >secondary forest, and plant N content was the highest in the plantation forest and the lowest in the primary forest. Soil N:P,C:P and plant C:P ratios were significantly higher in the primary forest than in the other two forest types. There were no significant difference for the soil C:N ratio among the three forest types. Plant N:P ratio was the highest in the secondary forest and the lowest in the plantation forest. Plant C:N ratio was in the order of primary forest > plantation forest > secondary forest. There were significantly positive linear correlations between N and P contents, C:N and C:P ratios, C:P and N:P ratios of arbor leaves in the different forest types, and significant negative linear correlations between plant C:N and N:P ratios, and between soil C:N and N:P ratios. There were no significant correlations between plant and soil C, N, P contents and C:P ratio, suggesting that the supply of C, N and P from soil had little influence on plant C, N and P contents.

俞月凤1,2,3,彭晚霞1,2,宋同清1,2**,曾馥平1,2,王克林1,2,文丽1,2,3,范夫静1,2,4. 喀斯特峰丛洼地不同森林类型植物和土壤C、N、P化学计量特征[J]. 应用生态学报.

YU Yue-feng1,2,3, PENG Wan-xia1,2, SONG Tong-qing1,2, ZENG Fu-ping1,2, WANG Ke-lin1,2, WEN Li1,2,3, FAN Fu-jing1,2,4. Stoichiometric characteristics of plant and soil C, N and P in different forest types in depressions between karst hills, southwest China.[J]. Chinese Journal of Applied Ecology.