[1]吴一群,赵伟东,郑祥洲*,等.氮沉降对森林土壤碳矿化及其温度敏感性的影响[J].江苏林业科技,2025,52(04):8-12.[doi:10.3969/j.issn.1001-7380.2025.04.002]
　Wu Yiqun,Zhao Weidong,Zheng Xiangzhou*,et al.The effect of nitrogen deposition on carbon mineralization and temperature sensitivity of forest soil[J].Journal of Jiangsu Forestry Science &Technology,2025,52(04):8-12.[doi:10.3969/j.issn.1001-7380.2025.04.002]
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氮沉降对森林土壤碳矿化及其温度敏感性的影响()
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《江苏林业科技》[ISSN:1001-7380/CN:32-1236/S]

卷:
第52卷
期数:
2025年04期
页码:
8-12
栏目:
试验研究
出版日期:
2025-08-31

文章信息/Info

Title:
The effect of nitrogen deposition on carbon mineralization and temperature sensitivity of forest soil
文章编号:
1001-7380（2025）04-0008-05
作者:
吴一群; 赵伟东; 郑祥洲*; 张玉树
福建省农业科学院资源环境与土壤肥料研究所、福建省植物营养与肥料重点实验室，福建 福州 350003
Author(s):
Wu Yiqun;  Zhao Weidong;  Zheng Xiangzhou*;  Zhang Yushu
Institute of Resources, Environment and Soil Fertilizer, Fujian Academy of Agricultural Sciences/Fujian Provincial Key Laboratory of Plant Nutrition and Fertilizer, Fuzhou 350003, China
关键词:
温度敏感性; 氮沉降; 土壤; 碳矿化; 温度; 亚热带森林
Keywords:
Temperature sensitivity; Nitrogen deposition;  Soil;  Carbon mineralization; Temperature; Subtropical forest
分类号:
S154.3；S718.55；X144
DOI:
10.3969/j.issn.1001-7380.2025.04.002
文献标志码:
A
摘要:
为探究氮沉降对亚热带森林土壤碳矿化及其温度敏感性的影响，以经过不同模拟氮沉降量处理（包含无氮对照、低氮和高氮3个处理），连续5 a每年氮施用量分别为0,40,80 kg/hm2的森林土壤为研究对象，通过野外原位取土，采用室内恒温连续好气培养法进行土壤碳矿化及温度敏感性测定。研究结果表明，在不同处理下，土壤CO2排放通量都表现为15 ℃条件下先下降后上升，25 ℃条件下全程缓慢下降，35 ℃条件下先迅速下降后趋于稳定；氮沉降会降低森林土壤CO2排放，与对照相比，高氮处理在15，25，35 ℃条件下，分别下降了32.97%，33.52%，27.04%；不同温度对CO2累积排放量的影响表现为随着温度的升高而增加。与15 ℃相比，25 ℃条件下CO2累积排放量增加了2.35—2.77倍，但是与25 ℃相比，35 ℃条件下CO2累积排放量只增加了11.78%—26.01%；不同温度段Q10有明显的差异，Q10（25 ℃/15 ℃）和Q10（35 ℃/25 ℃）分别为3.39—3.84和1.16—1.27，Q10（25 ℃/15 ℃）是Q10（35 ℃/25 ℃）的2.98—3.29倍。综上所述，氮沉降降低了森林土壤呼吸，增温提高土壤呼吸，氮沉降对Q10影响不明显，但是同一处理内Q10（25 ℃/15 ℃）显著高于Q10（35 ℃/25 ℃）。
Abstract:
To investigate the effect of nitrogen deposition on carbon mineralization and temperature sensitivity of subtropical forest soil, forest soil treated with different simulated nitrogen deposition amounts (including no nitrogen control, low nitrogen, and high nitrogen) for five consecutive years was selected as the research object. The nitrogen application per year were 0, 40, and 80 kg/hm2, respectively. Soil carbon mineralization and temperature sensitivity were determined by in-situ soil sampling in the field and indoor constant temperature continuous aerobic cultivation method. The research results showed that under three treatments, the soil CO2 emission flux exhibited a decrease followed by an increase at 15 ℃, a slow decrease throughout the process at 25 ℃, and a rapid decrease followed by stabilization at 35 ℃; Nitrogen deposition could reduce forest soil CO2 emission. Compared with the control, the high nitrogen treatment at 15 ℃, 25 ℃, and 35 ℃ decreased CO2 emission by 32.97%, 33.52%, and 27.04%, respectively; The effect of different temperatures on the cumulative CO2 emissions increased with temperature. Compared with at 15 ℃, the cumulative CO2 emissions at 25 ℃ increased by 2.35—2.77 times. However, compared with at 25 ℃, the cumulative CO2 emissions at 35 ℃ only increased by 11.78%—26.01%; There were significant differences in Q10 between different temperature ranges, with Q10(25 ℃/15 ℃) and Q10(35 ℃/25 ℃) being 3.39—3.84 and 1.16—1.27, respectively. Q10(25 ℃/15 ℃) being 2.98—3.29 times of Q10(35 ℃/25 ℃). In summary, nitrogen deposition reduced forest soil respiration, while warming increased soil respiration. The effect of nitrogen deposition on Q10 was not significant, but within the same treatment, Q10(25 ℃/15 ℃) was significantly higher than Q10(35 ℃/25 ℃).

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备注/Memo

备注/Memo:
收稿日期：2025-05-08;修回日期：2025-06-07
基金项目：福建省自然科学基金项目“氮沉降对亚热带森林土壤氮转化过程的影响机理”（2022J01464）；中央引导地方科技发展专项“基于‘土壤-气候-作物’耦合的氮肥管理技术研究与应用”（2023L3022）；“5511”协同创新工程项目“耕地地力提升与养分高效利用”（XTCXGC2021009）；福建省农业科学院科研项目“亚热带茶园土壤N2O排放途径及其微生物机制”（JCQN202403)
作者简介：吴一群（1982- ），男，福建连江人，助理研究员，硕士。主要从事土壤环境与施肥研究。E-mail:wuyiqun1@163.com
*通信作者：郑祥洲（1985- ），男，福建霞浦人，副研究员，硕士。主要从事土壤氮素循环研究。E-mail:z85103@qq.com
更新日期/Last Update: 2025-11-05