| 陈小花，余雪标，薛 杨，等.文昌滨海台地不同森林类型土壤DOC、DON库比较研究…[J].广东农业科学,2015,42(8):33-37 |
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文昌滨海台地不同森林类型土壤DOC、DON库比较研究… |
| Comparative study on soil dissolved organic carbon/nitrogenpool of different forest types in coastal terraces of Wenchang |
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| DOI： |
| 中文关键词: 滨海台地 森林类型 土壤DOC、DON库 |
| 英文关键词: coastal terraces forest types dissolved organic carbon / nitrogen pool |
| 基金项目: |
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| 摘要点击次数: 1608 |
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| 中文摘要: |
| 以海南文昌森林生态系统定位研究站内具有代表性的人促更新次生林、椰子纯林和次生林为对象，
研究海南文昌滨海台地不同森林类型土壤可溶性有机碳（DOC）/ 氮（DON）库差异及其分布特征。结果表明林
地土壤可溶性有机碳 / 氮主要富集在表层土壤中，并随土层的加深而递减；土壤可溶性有机碳占总有机碳的比率
波动在…1.2%~3.6%之间，随土层加深呈上升趋势；而土壤可溶性有机氮含量占土壤全氮的比例为…0.39%~0.86%；
相比之下，椰子林土壤DOC、DON 含量及DOC/SOC、DOC/DON比值均高于次生林和人促更新次生林。相关分析
结果表明，土壤有机碳总量与全氮、可溶性有机碳氮组分之间具有显著、极显著正相关性。 |
| 英文摘要: |
| To understand the differences of soil dissolved organic carbon (DOC)/nitrogen (DON) pool and theirdistribution characteristics of different forest types in coastal terraces of Wenchang, Hainan, this study took theartificial promoting regeneration of secondary forest, coconut forest and secondary forest in Forest Ecosystem ResearchStation in Wenchang District of Hainan Island as objects. The results showed that the soil DOC, DON of woodlandmainly concentrated in surface soil, and declined with the soil depth increasing. The ratio of soil DOC to total organiccarbon fluctuated from 1.2% to 3.6%, and rose with soil depth increasing. The ratio of soil DON to total nitrogen was0.39%-0.86%. The soil DOC, DON contents and DOC/SOC, DOC/DON values of coconut forest were higher than thosein secondary forest and artificial promoting regeneration of secondary forest. Correlation analysis showed that the soilorganic carbon had significantly, very significantly positive correlation with total nitrogen, total soluble organic carbonand nitrogen. |
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