氮磷添加对温带和亚热带森林土壤碳氮矿化的影响

doi:10.13209/j.0479-8023.2022.050

北京大学学报自然科学版 ›› 2022, Vol. 58 ›› Issue (4): 730-738.DOI: 10.13209/j.0479-8023.2022.050

氮磷添加对温带和亚热带森林土壤碳氮矿化的影响

李瑞, 冯继广, 朱彪^†

北京大学生态研究中心, 北京大学城市与环境学院, 地表过程分析与模拟教育部重点实验室, 北京 100871

收稿日期:2021-06-28 修回日期:2021-08-28 出版日期:2022-07-20 发布日期:2022-07-20
通讯作者: 朱彪, E-mail: biaozhu(at)pku.edu.cn
基金资助:
国家自然科学基金(31988102)和地理科学拔尖人才培养计划资助

Effects of Nitrogen and Phosphorus Addition on Soil Carbon and Nitrogen Mineralization in Temperate Forest and Subtropical Forest

LI Rui, FENG Jiguang, ZHU Biao^†

Institute of Ecology, College of Urban and Environmental Sciences, Key Laboratory for Earth Surface Processes (MOE), Peking University, Beijing 100871

Received:2021-06-28 Revised:2021-08-28 Online:2022-07-20 Published:2022-07-20
Contact: ZHU Biao, E-mail: biaozhu(at)pku.edu.cn

摘要/Abstract

摘要：

选取黑龙江五营温带森林和福建武夷山亚热带森林两个站点, 通过120天室内培养实验, 探讨氮磷(NH₄NO₃和NaH₂PO₄)添加对两种森林表层土壤(0~20 cm)碳氮矿化的影响。结果表明, 氮添加通过降低土壤微生物的生物量及其碳氮比来降低亚热带森林的土壤碳矿化, 但对温带森林的土壤碳矿化没有显著影响; 磷添加对两种森林的土壤碳矿化均没有显著影响。磷添加显著地增加温带森林的土壤净氮矿化, 氮添加显著地降低温带森林的土壤净氮矿化, 氮添加和磷添加均对亚热带森林的土壤净氮矿化没有显著影响。总体而言, 可能由于养分可利用性和土壤性质的区别, 温带森林和亚热带森林土壤碳氮矿化对氮磷添加的响应存在区别。

关键词: 养分添加, 温带森林, 亚热带森林, 土壤微生物, 土壤碳氮矿化

Abstract:

The soils collected from a temperate forest in Wuying in Heilongjiang Province and a subtropical forest in Wuyi Mountain in Fujian Province were used to investigate the effects of nitrogen and phosphorus addition (NH₄NO₃ and NaH₂PO₄) on soil carbon and net nitrogen mineralization in the topsoil (0–20 cm) through a 120-day laboratory incubation experiment. The results showed that nitrogen addition reduced soil carbon mineralization in the subtropical forest by reducing soil microbial biomass and its carbon/nitrogen ratio, but had no significant effect on soil carbon mineralization in the temperate forest. Phosphorus addition had no significant effect on soil carbon mineralization in the two forests. Moreover, phosphorus addition significantly increased soil net nitrogen mineralization in the temperate forest, nitrogen addition significantly reduced soil net nitrogen mineralization in the temperate forest, but nitrogen and phosphorus addition had no significant effect on soil net nitrogen mineralization in the subtropical forest. In general, the responses of soil carbon and net nitrogen mineralization to nitrogen and phosphorus addition are different between the temperate forest and the subtropical forest, likely due to the differences in nutrient availability and soil properties between the two forests.

Key words: nutrient addition, temperate forest, subtropical forest, soil microbes, soil carbon and net nitrogen mineralization

李瑞, 冯继广, 朱彪. 氮磷添加对温带和亚热带森林土壤碳氮矿化的影响[J]. 北京大学学报自然科学版, 2022, 58(4): 730-738.

LI Rui, FENG Jiguang, ZHU Biao.

Effects of Nitrogen and Phosphorus Addition on Soil Carbon and Nitrogen Mineralization in Temperate Forest and Subtropical Forest

[J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2022, 58(4): 730-738.

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链接本文: https://xbna.pku.edu.cn/CN/10.13209/j.0479-8023.2022.050

https://xbna.pku.edu.cn/CN/Y2022/V58/I4/730

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氮磷添加对温带和亚热带森林土壤碳氮矿化的影响

Effects of Nitrogen and Phosphorus Addition on Soil Carbon and Nitrogen Mineralization in Temperate Forest and Subtropical Forest

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