氮添加对内蒙古温带典型草原土壤的酸化效应及水分的影响

doi:10.13287/j.1001-9332.201910.022

应用生态学报 ›› 2019, Vol. 30 ›› Issue (10): 3285-3291.doi: 10.13287/j.1001-9332.201910.022

• 第九届全国青年生态学工作者学术研讨会会议专栏 • 上一篇下一篇

氮添加对内蒙古温带典型草原土壤的酸化效应及水分的影响

郭群^1,2*

¹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, 北京 100101;
²中国科学院大学资源与环境学院, 北京 100190

收稿日期:2019-04-03 出版日期:2019-10-20 发布日期:2019-10-20
通讯作者: *E-mail: guoq@igsnrr.ac.cn
作者简介:郭群, 女, 1984年, 博士, 助理研究员. 主要从事生态系统生态学研究. E-mail: guoq@igsnrr.ac.cn
基金资助:
国家自然科学基金项目(31570437)、美丽中国生态文明建设科技工程专项(XDA23060205)和国家重点研发计划项目(2017YFA0604801)资助

Soil acidification induced by nitrogen addition and its responses to water addition in Inner Mongolia Temperate Steppe, China

GUO Qun^1,2*

¹Key Laboratory of Ecosystem Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;
²College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China

Received:2019-04-03 Online:2019-10-20 Published:2019-10-20
Contact: *E-mail: guoq@igsnrr.ac.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (31570437), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA23060205) and the National Key R&D Program of China (2017YFA0604801).

摘要/Abstract

摘要： 氮(N)沉降增加带来的土壤酸化问题已经得到广泛的关注,然而土壤酸化是否受到未来降水格局改变的影响研究相对匮乏.本研究基于内蒙古温带典型草原5年(2013—2017年)的N添加(10和40 g N·m^-2·a^-1)和增雨(增雨量80 mm,分2 mm×40次、5 mm×16次、10 mm×8次、20 mm×4次、40 mm×2次5种处理)控制试验分析了水分对N添加后土壤酸化的影响.结果表明: 40 g N·m^-2·a^-1 N添加在土壤酸化出现的时间、酸化程度以及酸化随时间的变化速率上均大于10 g N·m^-2·a^-1 N添加.40 g N·m^-2·a^-1 N添加一年后即在各层土壤中观测到了显著的土壤pH降低,而10 g N·m^-2·a^-1 N添加只有土壤表层(0～5 cm)在N添加一年后出现显著的土壤pH降低,5～10和10～20 cm土层显著的土壤pH降低分别出现在氮添加4年和5年后.氮添加后土壤pH的降低幅度随氮添加年限的延长而增加,40 g N·m^-2·a^-1 N添加土壤pH随时间的降低速率大于10 g N·m^-2·a^-1 N添加.增雨不改变氮添加后土壤pH降低的结果,但中小强度增雨方式(2～20 mm)在干旱年份有缓解10 g N·m^-2·a^-1 N添加处理土壤酸化的趋势,而所有增雨方式在湿润年份均有加剧氮添加(10和40 g N·m^-2·a^-1)后土壤酸化的趋势,尤其是表层土壤,但缓解和加剧的程度均不显著.高强度增雨方式后(10～40 mm)土壤无机氮的淋溶可能是增雨加剧氮添加后土壤酸化的一个重要原因.本研究将为预测草原生态系统对未来氮沉降和降水格局改变的响应提供科学依据.

Abstract: Soil acidification due to exogenous nitrogen (N) deposition has been received sufficient attention in the past several decades. Whether the N-induced soil acidification is modulated by the altering precipitation regimes remains unclear. In this study, based on a five-year (2013-2017) manipulative field experiment with factorial N addition (10 and 40 g N·m^-2·a^-1 ) and water addition (a total amount of 80 mm·a^-1 was added in terms of five intensities, i.e., 2 mm×40 times, 5 mm×16 times, 10 mm×8 times, 20 mm×4 times, and 40 mm×2 times) in a typical steppe in Inner Mongolia, I analyzed the effects of water addition on soil acidification induced by N addition. I found that soil acidification induced by 40 g N m^-2·a^-1 N addition occurred earlier, more significant, and with a greater year by year changed rate than that of 10 g N·m^-2·a^-1 N addition. After one year treatment, I observed significant soil acidification at soil profiles of 0-5, 5-10, and 10-20 cm in the treatment of 40 g N·m^-2·a^-1 N addition, while significant soil acidification in 10 g N·m^-2·a^-1 N addition was observed after 1, 4, and 5 year since N was added for the three layers, respectively. In general, the magnitude of soil acidification induced by N addition increased with the increasing period after N addition, and the slope of the regression line was steeper in the relatively higher dose of N addition (40 g N·m^-2·a^-1). Soil acidification induced by N addition could not be reversed by water addition, but water addition in terms of relatively lower intensities (i.e., all the treatments except 40 mm×2 times) could relieve the N-induced soil acidification to a certain extent in the treatment with lower dose of N addition (10 g N·m^-2·a^-1) in dry years. In wet years, however, water addition exacerbated soil acidification after N was added, especially in the topsoil. The leaching of soil inorganic N after higher intensity of water addition (10-40 mm) could explain the deteriorated N-induced soil acidification when water was added. There was no significance for the relief or deterioration to N-induced soil acidification by water addition. Our results had important implications for understanding grassland responses to N deposition and altered precipi-tation regime in the future.

郭群. 氮添加对内蒙古温带典型草原土壤的酸化效应及水分的影响[J]. 应用生态学报, 2019, 30(10): 3285-3291.

GUO Qun. Soil acidification induced by nitrogen addition and its responses to water addition in Inner Mongolia Temperate Steppe, China[J]. Chinese Journal of Applied Ecology, 2019, 30(10): 3285-3291.

参考文献

[1] Guo JH, Liu XJ, Zhang Y, et al. Significant acidification in major Chinese croplands. Science, 2010, 327: 1008-1010
[2] Xu R-K (徐仁扣), Li J-Y (李九玉), Zhou S-W (周世伟), et al. Scientific issues and controlling strategies of soil acidification of croplands in China. Bulletin of Chinese Academy of Sciences (中国科学院院刊), 2018, 33(2): 160-167 (in Chinese)
[3] Malhi SS, Nyborg M, Harapiak JT. Effects of long-term N fertilizer-induced acidification and liming on micronutrients in soil and in bromegrass hay. Soil & Tillage Research, 1998, 48: 91-101
[4] Lu Y-H (鲁艳红), Liao Y-L (廖育林), Nie J (聂军), et al. Effect of long-term fertilization and lime application on soil acidity of reddish paddy soil. Acta Pedologica Sinica (土壤学报), 2016, 53(1): 202-212 (in Chinese)
[5] Sun T-C (孙天聪), Li S-Q (李世清), Shao M-A (邵明安), et al. Effects of long-term fertilization on distribution of organic nitrogen components in soil aggregates in sub-humid agroecosystem. Chinese Journal of Applied Ecology (应用生态学报), 2007, 18(10): 2233-2238 (in Chinese)
[6] Wang J-D (汪吉东), Qi B-J (戚冰洁), Zhang Y-C (张永春), et al. Effects of long-term fertilization on pH buffer system of sandy loam calcareous fluvor-aquic soil. Chinese Journal of Applied Ecology (应用生态学报), 2012, 23(4): 1031-1036 (in Chinese)
[7] Huang J-N (黄锦铌), Cheng Y (程煜), Yang H-Y (杨红玉), et al. Analysis of the dynamic soil nutrients of a Castanopsis carlesii, Chinese Chestnut & Sightseeing Wood natural forest under simulated nitrogen deposition. Acta Ecologica Sinica (生态学报), 2017, 37(1): 63-73 (in Chinese)
[8] Zheng C (郑超), Guo Z-X (郭治兴), Yuan Y-Z (袁宇志), et al. Spatiotemporal variation of soil pH in Guangdong Province of China in past 30 years. Chinese Journal of Applied Ecology (应用生态学报), 2019, 30(2): 593-601 (in Chinese)
[9] Hu B (胡波), Wang Y-Q (王云琦), Wang Y-J (王玉杰), et al. Effects of simulated nitrogen deposition on soil acidification and soil buffering capacity. Research of Environmental Sciences (环境科学研究), 2015, 28(3): 418-424 (in Chinese)
[10] Lin Y (林岩), Duan L (段雷), Yang Y-S (杨永森), et al. Contribution of simulated nitrogen deposition to forest soil acidification in area with high sulfur deposition. Environmental Science (环境科学), 2007, 28(3): 640-646 (in Chinese)
[11] Chen G-Q (陈高起), Fu W-L (傅瓦利), Luo Y-C (罗亚晨), et al. Effects of nitrogen addition on available nitrogen content and acidification in cold-temperate coniferous forest soil in the growing season. Research of Environmental Sciences (环境科学研究), 2014, 35(12): 4686-4694 (in Chinese)
[12] Sun B-H (孙本华), Hu Z-Y (胡正义), Lyu J-L (吕家珑), et al. Nutrient leaching and acidification of Southern China coniferous forest red soil under stimulated N deposition. Chinese Journal of Applied Ecology (应用生态学报), 2006, 17(10): 1820-1826 (in Chinese)
[13] Xiao H-L (肖辉林), Zhuo M-N (卓慕宁), Wan H-F (万洪富). Effect of increased deposition of atmospheric nitrogen on forest ecosystem. Chinese Journal of Applied Ecology (应用生态学报), 1996, 7(suppl.): 110-116 (in Chinese)
[14] Yang YH, Fang JY, Ji CJ, et al. Widespread decreases in topsoil inorganic carbon stocks across China’s grasslands during 1980s-2000s. Global Change Biology, 2012, 18: 3672-3680
[15] Chen DM, Li JJ, Lan ZC, et al. Soil acidification exerts a greater control on soil respiration than soil nitrogen availability in grasslands subjected to long-term nitrogen enrichment. Functional Ecology, 2016, 30: 658-669
[16] Xu R-K (徐仁扣). Research progresses in soil acidification and its control. Soils (土壤), 2015, 47(2): 238-244 (in Chinese)
[17] Wang J-D (汪吉东), Xu X-J (许仙菊), Ning Y-W (宁运旺), et al. Progresses in agricultural driving factors on accelerated acidification of soils. Soils (土壤), 2015, 47(4): 627-633 (in Chinese)
[18] Schroder JL, Zhang H, Girma K, et al. Soil acidification from long-term use of nitrogen fertilizers on winter wheat. Soil Science Society of America Journal, 2011, 75: 957-964
[19] Ji G (姬钢), Xu M-G (徐明岗), Wen S-L (文石林), et al. Characteristics of soil pH and exchangeable acidity in red soil profile under different vegetation types. Chinese Journal of Applied Ecology (应用生态学报), 2015, 26(9): 2639-2645 (in Chinese)
[20] Liu H-Y (刘贺永), He P (何鹏), Cai J-P (蔡江平), et al. Effects of simulated nitrogen deposition on soil pH and electric conductivity in a typical grassland of Inner Mongolia. Chinese Journal of Soil Science (土壤通报), 2016, 47(1): 85-91 (in Chinese)
[21] Guo Q, Hu ZM, Li SG, et al. Exogenous N addition enhances the responses of gross primary productivity to individual precipitation events in a temperate grassland. Scientific Reports, 2016, 6: 26901
[22] Chen JM, Luo YQ, Xia JY, et al. Divergent responses of ecosystem respiration components to livestock exclusion on the Qinghai Tibetan Plateau. Land Degradation & Development, 2018, 29: 1726-1737
[23] Han Y, Zhang Z, Wang CH, et al. Effects of mowing and nitrogen addition on soil respiration in three patches in an oldfield grassland in Inner Mongolia. Journal of Plant Ecology, 2012, 5: 219-228
[24] Liu W, Lu X, Xu W, et al. Effects of water and nitrogen addition on ecosystem respiration across three types of steppe: The role of plant and microbial biomass. Science of the Total Environment, 2018, 619: 103-111
[25] Zhang HF, Liu HM, Zhao JN, et al. Elevated precipitation modifies the relationship between plant diversity and soil bacterial diversity under nitrogen deposition in Stipa baicalensis steppe. Applied Soil Ecology, 2017, 119: 345-353
[26] Wei J-M (魏金明), Jiang Y (姜勇), Fu M-M (符明明), et al. Effects of water addition and fertilization on soil nutrient contents and pH value of typical grassland in Inner Mongolia. Chinese Journal of Ecology (生态学杂志), 2011, 30(8): 1642-1646 (in Chinese)
[27] Shi LL, Zhang HZ, Liu T, et al. An increase in precipitation exacerbates negative effects of nitrogen deposition on soil cations and soil microbial communities in a temperate forest. Environmental Pollution, 2018, 235: 293-301
[28] Bai YF, Wu JG, Clark CM, et al. Tradeoffs and thresholds in the effects of nitrogen addition on biodiversity and ecosystem functioning: Evidence from Inner Mongolia Grasslands. Global Change Biology, 2010, 16: 358-372
[29] Guo Q (郭群), Hu Z-M (胡中民), Li X-R (李轩然), et al. Effects of precipitation timing on aboveground net primary productivity in Inner Mongolia temperate steppe. Acta Ecologica Sinica (生态学报), 2013, 33(15): 4808-4817 (in Chinese)
[30] Bowman WD, Cleveland CC, Halada L, et al. Negative impact of nitrogen deposition on soil buffering capacity. Nature Geoscience, 2008, 1: 767-770
[31] Zhang YG, Xu ZW, Jiang DM, et al. Soil exchangeable base cations along a chronosequence of Caragana microphylla plantation in a semi-arid sandy land, China. Journal of Arid Land, 2013, 5: 42-50
[32] Zhang YG, Yang S, Fu MM, et al. Sheep manure application increases soil exchangeable base cations in a semi-arid steppe of Inner Mongolia. Journal of Arid Land, 2015, 7: 361-369
[33] Hu ZM, Yu GR, Fan JW, et al. Precipitation-use efficiency along a 4500 km grassland transect. Global Ecology and Biogeography, 2010, 19: 842-851
[34] Li LF, Zheng ZZ, Biederman JA, et al. Ecological responses to heavy rainfall depend on seasonal timing and multi-year recurrence. New Phytologist, 2019, 223: 647-660
[35] Hao YB, Wang YF, Mei XR, et al. The response of ecosystem CO₂ exchange to small precipitation pulses over a temperate steppe. Plant Ecology, 2010, 209: 335-347

氮添加对内蒙古温带典型草原土壤的酸化效应及水分的影响

Soil acidification induced by nitrogen addition and its responses to water addition in Inner Mongolia Temperate Steppe, China

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 0

编辑推荐

Metrics

本文评价