亚热带杉木林土壤有机碳及其活性组分对氮磷添加的响应

doi:10.13287/j.1001-9332.201702.024

应用生态学报 ›› 2017, Vol. 28 ›› Issue (2): 449-455.doi: 10.13287/j.1001-9332.201702.024

• 中国生态学学会2016年学术年会会议专栏 • 上一篇下一篇

亚热带杉木林土壤有机碳及其活性组分对氮磷添加的响应

张秀兰¹, 王方超¹, 方向民^1*, 何平¹, 张宇飞¹, 陈伏生¹, 王辉民²

¹江西农业大学林学院江西特色林木资源培育与利用2011协同创新中心, 南昌 330045;
²中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室千烟洲生态试验站, 北京 100101

收稿日期:2016-07-06 出版日期:2017-02-18 发布日期:2017-02-18
通讯作者: * E-mail: xmfang2013@126.com
作者简介:张秀兰, 女, 1992年生, 硕士研究生. 主要从事森林土壤碳、氮循环研究. E-mail: xlzhang8286@163.com
基金资助:
本文由国家重点研发计划项目(2016YFD0600202-2)和国家自然科学基金项目(31360179,31160107)资助

Responses of soil organic carbon and its labile fractions to nitrogen and phosphorus additions in Cunninghamia lanceolata plantations in subtropical China.

ZHANG Xiu-lan¹, WANG Fang-chao¹, FANG Xiang-min^1*, HE Ping¹, ZHANG Yu-fei¹, CHEN Fu-sheng¹, WANG Hui-min²

¹Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang 330045, China;
²Qianyanzhou Ecological Research Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.

Received:2016-07-06 Online:2017-02-18 Published:2017-02-18
Contact: * E-mail: xmfang2013@126.com
Supported by:
This work was supported by the Natio-nal Key Research and Development Program (2016YFD0600202-2) and the National Natural Science Foundation of China (31360179, 31160107).

摘要/Abstract

摘要： 通过野外氮、磷添加,分析N₀(0 kg N·hm^-2·a^-1)、N₁(50 kg N·hm^-2·a^-1)、N₂(100 kg N·hm^-2·a^-1)、P(50 kg P·hm^-2·a^-1)、N₁P和N₂P等6种处理3年后对亚热带杉木人工林土壤有机碳(SOC)、颗粒有机碳(POC)和水溶性有机碳(WSOC)的影响.结果表明:氮、磷添加对0～20 cm土层SOC含量无显著影响.磷添加显著降低0～5 cm土层POC含量,与无磷处理相比,加磷处理POC含量降低26.1%.WSOC含量对氮、磷添加的响应主要表现在0～5 cm土层,低水平氮添加和磷添加显著提高WSOC含量.在0～5 cm土层,氮添加对POC/SOC值无显著影响,而与无磷添加相比,POC/SOC值在磷添加处理下显著降低15.9%.在5～10和10～20 cm土层,氮、磷添加处理对POC/SOC值无显著影响.在亚热带地区,森林土壤碳稳定性主要受磷含量的调控,短期磷添加易导致表层土壤活性有机碳分解,增加土壤碳稳定性.

Abstract: A series of nitrogen (N) and phosphorus (P) addition experiments using treatments of N₀(0 kg N·hm^-2·a^-1), N₁(50 kg N·hm^-2·a^-1), N₂(100 kg N·hm^-2·a^-1), P (50 kg P·hm^-2·a^-1), N₁P and N₂P were conducted at Cunninghamia lanceolata plantations in subtropical China. The responses of soil organic carbon (SOC), particulate organic carbon (POC) and water-soluble organic carbon (WSOC) to the nutrient addition treatments after 3 years were determined. The results showed that N and P additions had no significant effects on SOC concentration in 0-20 cm soil layer, while P addition significantly decreased soil POC content in 0-5 cm soil layer by 26.1%. The responses of WSOC to N and P addition were mainly found in 0-5 cm soil layer, and low level N and P addition significantly increased the WSOC content in 0-5 cm soil layer. Nitrogen addition had no significant effect on POC/SOC, while the POC/SOC significantly decreased by 15.9% in response to P addition in 0-5 cm soil layer. In 5-10 cm and 10-20 cm soil layers, POC/SOC was not significantly altered in N and P addition treatments. Therefore, the forest soil C stability was mainly controlled by P content in subtropical areas. P addition was liable to cause the decomposition of surface soil active organic C and increased the soil C stability in the short term treatment.

张秀兰, 王方超, 方向民, 何平, 张宇飞, 陈伏生, 王辉民. 亚热带杉木林土壤有机碳及其活性组分对氮磷添加的响应[J]. 应用生态学报, 2017, 28(2): 449-455.

ZHANG Xiu-lan, WANG Fang-chao, FANG Xiang-min, HE Ping, ZHANG Yu-fei, CHEN Fu-sheng, WANG Hui-min. Responses of soil organic carbon and its labile fractions to nitrogen and phosphorus additions in Cunninghamia lanceolata plantations in subtropical China.[J]. Chinese Journal of Applied Ecology, 2017, 28(2): 449-455.

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亚热带杉木林土壤有机碳及其活性组分对氮磷添加的响应

Responses of soil organic carbon and its labile fractions to nitrogen and phosphorus additions in Cunninghamia lanceolata plantations in subtropical China.

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