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| 不不同林龄针阔混交林土壤生态化学计量特征 |
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董晓红,张卫强,唐洪辉,陈伟光,苏木荣,盘李军
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广州生产力促进中心,广东省林业科学研究院,广东省林业科学研究院,广东省佛山市云勇生态林养护中心,广东省佛山市云勇生态林养护中心,广东省佛山市云勇生态林养护中心
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| 摘要: |
| 以南亚热带不同林龄（分别为10~11 a、7~9 a和3~5 a生）针阔混交林土壤作为研究对象，对土壤有机碳、全氮、全磷和全钾储量及其生态化学计量特征进行了研究。结果表明，不同林龄针阔混交林土壤有机质碳储量（106.72~136.61 t[DK]·hm-2）、全氮储量（9.17~11.19 t[DK]·hm-2）、全磷储量（4.07~6.77 t[DK]·hm-2）及全钾储量（321.85~370.59 t[DK]·hm-2）均随林龄的增加表现为先降低后升高的趋势。C/N、C/P、C/K、N/P、N/K和P/K在不同林龄针阔混交林间差异不显著（P>0.05）。土壤有机碳储量与土壤全氮储量、C/N、C/P、C/K、N/P和N/K呈极显著正相关（P<0.01），且与土壤全氮储量相关系数最高，表现出相对一致的变化规律；土壤全氮储量与C/P、C/K、N/P、N/K极显著正相关（P<0.01）；土壤全磷储量与C/P、N/P呈极显著负相关（P<0.01），而与C/N、P/K呈极显著正相关（P<0.01）。研究结果可为南亚热带人工林的科学管理提供参考。 |
| 关键词: 生态化学计量特征 针阔混交林 南亚热带 |
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| 基金项目:广东省林业科技创新专项项目(2010KJCX013-02)、佛山市生态景观林培育技术研究与推广示范和国家林业局广东东江源站联合资助。 |
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| Soil Ecological Stoichiometry of Conifer Broadleaved Plantations of \=Different Age in Southern Subtropical Region |
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DONG Xiaohong,ZHANG Weiqiang,TANG Honghui,CHEN Weiguang,SU Murong and PAN Lijun
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Guangdong Academy of Forestry,Guangzhou,Guangdong Academy of Forestry,Guangzhou,Maintenance Center for Yunyong Ecological Forest of Foshan,Foshan,Maintenance Center for Yunyong Ecological Forest of Foshan,Foshan,Maintenance Center for Yunyong Ecological Forest of Foshan,Foshan
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| Abstract: |
| The objective of this study was to clarify the soil stoichiometric characteristics of conifer broadleaved plantations (CBP) with different age in Southern subtropical region. The soil in different CBP were selected to measure soil organic carbon (C), total nitrogen (N), total phosphorous (P), and total potassium (K) storages. The results indicated that the storage of soil organic C, total N, total P and total K were 106.72—136.61 t[DK]·hm-2, 9.17—11.19 t[DK]·hm-2, 4.07—6.77 t[DK]·hm-2 and 321.85—370.59 t[DK]·hm-2, respectively, and storage of four kinds of elements first decreased and then increased with increasing forest age. Soil C/N, C/P, C/K, N/P, N/K, P/K ratio were relatively stable, and these were no significant difference (P>0.05) among different CBP. The soil organic carbon storage was significantly positively correlated with total N storage, C/N, C/P, C/K, N/P and N/K(P<0.01), and organic carbon storage of soil had an important impact on total N storage, and showed relatively consistent variation. The total nitrogen storage of soil was significantly positively correlated with C/P, C/K, N/P and N/K (P<0.01). The total phosphorous storage of soil was significantly negatively correlated with C/P and N/P(P<0.01), as well as positively correlated with C/N and P/K (P<0.01). The results could provide a scientific basis for sustainable management of plantation. |
| Key words: soil ecological stoichiometry conifer-broadleaved plantation with different age Southern subtropical region |
