| 云南药山自然保护区黄背栎林和巧家五针松林生态化学计量特征 |
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| 引用本文： | 杨幸,王平,高大威,高宁宁,李璐杉,杨晓柳,钟乾娟.云南药山自然保护区黄背栎林和巧家五针松林生态化学计量特征[J].生态学报,2019,39(11):4021-4028. |
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| 作者姓名： | 杨幸 王平 高大威 高宁宁 李璐杉 杨晓柳 钟乾娟 |
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| 作者单位： | 云南师范大学旅游与地理科学学院;云南药山国家级自然保护区管护局 |
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| 基金项目： | 中央财政林业国家级自然保护区补助资金项目 |
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| 摘 要： | 以云南药山自然保护区黄背栎林和巧家五针松林的4块样地为研究对象,旨在揭示这2种森林生态系统营养元素含量状况和土壤养分的供给能力。通过分析4块样地"叶片-凋落物-土壤"C、N、P含量、生态化学计量特征及其相关性,结果表明:(1)不同样地同一组分的C、N含量差异显著,P含量差异不显著,同一样地各组分间C、N含量差异显著,均为叶片凋落物土壤,P含量则为叶片土壤凋落物;(2)不同样地叶片C∶P、N∶P比值和凋落物与土壤C∶N比值差异不显著,其余指标差异均显著。同一样地叶片、凋落物、土壤的C∶N、C∶P、N∶P比值差异显著,均为凋落物叶片土壤;(3)黄背栎林叶片-土壤C含量、C∶P比值和凋落物-叶片N∶P比值呈极显著或显著相关,巧家五针松林凋落物-叶片C、N含量和叶片-土壤P含量、C∶N、N∶P比值呈极显著或显著相关;(4)土壤N元素缺乏是限制植物生长的主要因素,P元素主要源于土壤矿物风化释放,而非生物小循环。
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| 关 键 词： | 生态化学计量 叶片 凋落物 土壤 药山自然保护区 |
| 收稿时间： | 2018/5/21 0:00:00 |
| 修稿时间： | 2019/1/30 0:00:00 |
Ecological stoichiometry of Form. Quercus pannosa and Form. Pinus squamata in the Yaoshan Nature Reserve, Yunnan |
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| YANG Xing,WANG Ping,GAO Dawei,GAO Ningning,LI Lushan,YANG Xiaoliu and ZHONG Qianjuan.Ecological stoichiometry of Form. Quercus pannosa and Form. Pinus squamata in the Yaoshan Nature Reserve, Yunnan[J].Acta Ecologica Sinica,2019,39(11):4021-4028. |
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| Authors: | YANG Xing WANG Ping GAO Dawei GAO Ningning LI Lushan YANG Xiaoliu and ZHONG Qianjuan |
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| Institution: | College of Tourism and Geographic Sciences, Yunnan Normal University, Kunming 650500, China,College of Tourism and Geographic Sciences, Yunnan Normal University, Kunming 650500, China,College of Tourism and Geographic Sciences, Yunnan Normal University, Kunming 650500, China,College of Tourism and Geographic Sciences, Yunnan Normal University, Kunming 650500, China,College of Tourism and Geographic Sciences, Yunnan Normal University, Kunming 650500, China,College of Tourism and Geographic Sciences, Yunnan Normal University, Kunming 650500, China and Management and Protection Bureau of Yaoshan National Nature Reserve in Yunnan Province, Zhaotong 654600, China |
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| Abstract: | We aimed to elucidate the nutrient element content and soil nutrient supply capacity of two forest ecosystems-Form. Quercus pannosa and Form. Pinus squamata-in the Yaoshan Nature Reserve of Yunnan, by using four sample plots. The analysis of C, N, and P content; ecologic stoichiometry; and its correlation with "leaf-litter-soil" in the four sample plots revealed the following. (1) The content of C and N in the same component was significantly different, and the content of P was not significantly different. There were significant differences in the content of C and N among the components in the same sample plot, and it decreased in the following order leaf > litter > soil. The content of P decreased in the order leaf > soil > litter. (2) The C:P and N:P ratios of leaf, and the C:N ratio of litter and soil were not significantly different in the four sample plots, whereas, the other indicators were significantly different. The C:N, C:P, and N:P ratios of leaf, litter, and soil in the same land were significantly different, and decreased in the order litter > leaf > soil. (3) The leaf-soil C content and C:P ratio, and litter-leaf N:P ratio in the Form. Q. pannosa exhibited highly significant or significant correlation. There was highly significant or significant correlation between the litter-leaf C and N content, leaf-soil P content, and C:N and N:P ratios in the Form. P. squamata. (4) The lack of soil N is the main factor limiting plant growth. Phosphorus is mainly derived from soil mineral weathering, rather than the short-term biological cycle. |
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| Keywords: | ecological stoichiometry leaf litter soil Yaoshan Nature Reserve |
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