农牧交错带半干旱草地生态系统CO2交换对短期不同水平氮添加的响应

doi:10.11686/cyxb2018409

草业学报 ›› 2019, Vol. 28 ›› Issue (5): 163-170.DOI: 10.11686/cyxb2018409

农牧交错带半干旱草地生态系统CO₂交换对短期不同水平氮添加的响应

董斅晓¹, 薄元超¹, 孙建平^1,2, 张晓琳¹, 王常慧^2,*, 董宽虎^1,*

1.山西农业大学动物科技学院,山西太谷 030801;
2.中国科学院植物研究所植被与环境变化国家重点实验室,北京 100093

收稿日期:2018-06-22 修回日期:2018-10-18 出版日期:2019-05-20 发布日期:2019-05-20
通讯作者: E-mail: dongkuanhu@sxau.edu.cn, wangch@ibcas.ac.cn
作者简介:董斅晓(1992-),女,山西偏关人,在读硕士。E-mail: dongxiaoxiao_daisy@126.com
基金资助:
国家重点研发计划子课题(2016YFC0500703),国家自然科学基金面上项目(31572452,41573063)和植被与环境变化国家重点实验室研究群项目资助

Short term effects on ecosystem CO₂ exchange in a semi-arid grassland agro-pastoral ecotone, following differing levels of nitrogen application

DONG Xiao-xiao¹, BO Yuan-chao¹, SUN Jian-ping^1,2, ZHANG Xiao-lin¹, WANG Chang-hui^2,*, DONG Kuan-hu^1,*

1.College of Animal Science and Technology, Shanxi Agricultural University, Taigu 030801, China;
2.State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China

Received:2018-06-22 Revised:2018-10-18 Online:2019-05-20 Published:2019-05-20
Contact: E-mail: dongkuanhu@sxau.edu.cn, wangch@ibcas.ac.cn

摘要/Abstract

摘要： 本研究以位于山西省右玉县农牧交错带的半干旱草地生态系统为研究对象,探究短期内不同水平的氮添加对半干旱草地生态系统CO₂交换的影响。试验设置8个梯度0、1、2、4、8、16、24和32 g N·m^-2(分别表示为N₀、N₁、N₂、N₄、N₈、N₁₆、N₂₄和N₃₂)。采用静态箱法对草地净生态系统CO₂交换量(NEE)、生态系统呼吸(ER)进行测定,同时监测10 cm表层土壤温度和含水量。试验结果表明:短期氮添加(N₃₂除外)显著增加农牧交错带半干旱草地生态系统净碳交换,NEE、ER和生态系统总初级生产力(GEP)在整个生长季均随氮素添加水平的上升呈单峰型变化趋势,在N₁₆和N₂₄处理下的生态系统CO₂交换达到最高,而N₃₂显著降低了NEE;不同氮添加水平下,ER和GEP相对NEE更为敏感;表层(010 cm)土壤温度与含水量影响生态系统CO₂交换,表现为:土壤温度(10 cm)与ER呈显著正相关(R²>0.1, P<0.05),表层(010 cm)土壤含水量与NEE和GEP分别呈显著正相关和显著负相关(R²>0.1, P<0.05)。因此,短期不同水平氮添加增加了农牧交错带半干旱草地生态系统净碳吸收,对该地区草地生态系统碳的源/汇功能具有一定的参考意义。

关键词: 氮梯度, 农牧交错带, 半干旱草地, 生态系统CO₂交换

Abstract: This study investigated the short-term effects of different nitrogen (N) application rates in a semi-arid grassland ecosystem in an agro-pastoral ecotone in Youyu County, Shanxi Province, China. A randomized complete block experiment was set up with 8 nitrogen levels (0, 1, 2, 4, 8, 16, 24, and 32 g N·m^-2, denoted N₀, N₁, N₂, N₄, N₈, N₁₆, N₂₄, N₃₂, respectively), and 6 replicates (48 plots in total). Ecosystem net CO₂ exchange (NEE) and ecosystem respiration (ER) under the different treatments were monitored using the static chamber method, with a fixed base for the portable chamber located in each plot before the start of the growing season, and chamber dimensions 50 cm×50 cm×50 cm. Gross ecosystem CO₂ capture was calculated from those primary data by difference, and was taken as gross ecosystem productivity (GEP). Nine measurements were undertaken at approximately two weekly intervals between June and September. Over this period, short-term N addition (except N₃₂, which had a detrimental effect) significantly increased the net carbon uptake, with peak response seen in N₁₆ and N₂₄ treatments. The responses of ER and GEP to different N addition were more sensitive than NEE. There was a significant positive correlation between 10 cm soil temperature and ER (R²=0.319, P<0.0001), while the soil moisture for the upper 10 cm was significantly positively correlated with NEE (R²=0.420, P<0.0001) and was significantly negatively correlated with GEP (R²=0.202, P=0.0004). Therefore, short-term nitrogen addition increased the net carbon uptake of this semi-arid in the agro-pastoral ecotone, grassland ecosystem. Our study provides some reference data for grassland ecosystem carbon source/sink relationships in this region.

Key words: nitrogen addition levels, agro-pastoral ecotone, semi-arid grassland, ecosystem CO₂ exchange

董斅晓, 薄元超, 孙建平, 张晓琳, 王常慧, 董宽虎. 农牧交错带半干旱草地生态系统CO₂交换对短期不同水平氮添加的响应[J]. 草业学报, 2019, 28(5): 163-170.

DONG Xiao-xiao, BO Yuan-chao, SUN Jian-ping, ZHANG Xiao-lin, WANG Chang-hui, DONG Kuan-hu. Short term effects on ecosystem CO₂ exchange in a semi-arid grassland agro-pastoral ecotone, following differing levels of nitrogen application[J]. Acta Prataculturae Sinica, 2019, 28(5): 163-170.

参考文献

[1] Zhang Z T, Liu Q.Grassland resources and its exploitation and utilization in key pastoral areas in China. Beijing: Science and Technology of China Press, 1992.
章祖同, 刘起. 中国重点牧区草地资源及其开发利用. 北京: 中国科学技术出版社, 1992.
[2] Chen Z Z, Wang S P, Wang Y F, et al.China’s typical grassland ecosystem. Beijing: Science Press, 2002.
陈佐忠, 汪诗平, 王艳芬, 等. 中国典型草原生态系统. 北京: 科学出版社, 2002.
[3] Liang Y, Gan Z Z B, Zhang W N, et al. A review on effect of climate change on grassland ecosystem in China. Journal of Agricultural Science and Technology, 2014, 16(2): 1-8.
梁艳, 干珠扎布, 张伟娜, 等. 气候变化对中国草原生态系统影响研究综述. 中国农业科技导报, 2014, 16(2): 1-8.
[4] Zhao H L, Zhao X Y, Zhang T H, et al. Boundary line on agro-pasture zigzag zone in north China and its problems on eco-environment. Advance in Earth Sciences, 2002, 17(5): 739-748.
赵哈林, 赵学勇, 张铜会, 等. 北方农牧交错带的地理界定及其生态问题. 地球科学进展, 2002, 17(5): 739-748.
[5] Gu F X, Huang M, Zhang Y D, et al. Modeling the temporal-spatial patterns of atmospheric nitrogen deposition in China during 1961-2010. Acta Ecologica Sinica, 2016, 36(12): 3591-3600.
顾峰雪, 黄玫, 张远东, 等. 1961-2010年中国区域氮沉降时空格局模拟研究. 生态学报, 2016, 36(12): 3591-3600.
[6] Galloway J N.The global nitrogen cycle: Past, present and future . Science in China (Series C:Life Sciences), 2005, (S2): 669-677.
[7] You C M, Hu Z M, Guo Q, et al. Effects of nitrogen addition on carbon exchange in a typical steppe in Inner Mongolia. Acta Ecologica Sinica, 2016, 36(8): 2142-2150.
游成铭, 胡中民, 郭群, 等. 氮添加对内蒙古温带典型草原生态系统碳交换的影响. 生态学报, 2016, 36(8): 2142-2150.
[8] Niu S L, Wu M Y, Han Y, et al. Nitrogen effects on net ecosystem carbon exchange in a temperate steppe. Global Change Biology, 2010, 16(1): 144-155.
[9] Wen H Y.Effects of nitrogen deposition on carbon dynamics in the typical steppe of the Loess Plateau. Lanzhou: Lanzhou University, 2013.
文海燕. 氮沉降对黄土高原典型草原碳过程的影响. 兰州: 兰州大学, 2013.
[10] Niu S L, Yang H J, Zhang Z, et al. Non-additive effects of water and nitrogen addition on ecosystem carbon exchange in a temperate steppe. Ecosystems, 2009, 12(6): 915-926.
[11] Peng Y F, Li F, Zhou G Y, et al. Linkages of plant stoichiometry to ecosystem production and carbon fluxes with increasing nitrogen inputs in an alpine steppe. Global Change Biology, 2017, 23(12): 5249-5259.
[12] Ha S M Q E, Zhang X Y, Niu G X, et al. Effects of nitrogen addition on ecosystem CO₂ exchange in a Meadow Steppe, Inner Mongolia. Chinese Bulletin of Botany, 2018, 53(1): 27-41.
哈斯木其尔, 张学耀, 牛国祥, 等. 氮素添加对内蒙古草甸草原生态系统CO₂交换的影响. 植物学报, 2018, 53(1): 27-41.
[13] Bubier J L, Moore T R, Bledzki L A.Effects of nutrient addition on vegetation and carbon cycling in an ombrotrophic bog. Global Change Biology, 2007, 13: 2341-2348.
[14] Wstanley H, Daniell P, Katharinen S.Ecosystem responses to water and nitrogen amendment in a California grassland. Global Change Biology, 2007, 13: 1168-1186.
[15] Lebauer D, Treseder K L.Nitrogen limitation of net primary productivity in terrestrial ecosystems is globally distributed. Ecology, 2008, 89: 371-379.
[16] Wu Q, Han G D, Wang Z W, et al. Effects of warming and N addition on ecosystem carbon exchange in a desert steppe. Chinese Journal of Ecology, 2016, 35(6): 1427-1434.
武倩, 韩国栋, 王忠武, 等. 模拟增温和氮素添加对荒漠草原生态系统碳交换的影响. 生态学杂志, 2016, 35(6): 1427-1434.
[17] Chen Z F.The effect of warming and N addition on ecosystem gas exchange in Inner Mongolia desert steppe. Hohhot: Inner Mongolia University, 2012.
陈志芳. 模拟增温和氮素添加对荒漠草原生态系统气体交换的影响. 呼和浩特: 内蒙古农业大学, 2012.
[18] Li J, Guo R, Zhu T C, et al. Water-and plant-mediated responses of ecosystem carbon fluxes to warming and nitrogen addition on the Songnen grassland in northeast China. PLoS One, 2012, 7(9): e45205.
[19] Zhou X, Wan S, Luo Y.Source components and interannual variability of soil CO₂ efflux under experimental warming and clipping in a grassland ecosystem. Global Change Biology, 2007, 3: 761-775.
[20] Zong N, Shi P L, Jiang J, et al. Interactive effects of short-term nitrogen enrichment and simulated grazing on ecosystem respiration in an alpine meadow on the Tibetan Plateau. Acta Ecologica Sinica, 2013, 33(19): 6191-6201.
宗宁, 石培礼, 蒋婧, 等. 短期氮素添加和模拟放牧对青藏高原高寒草甸生态系统呼吸的影响. 生态学报, 2013, 33(19): 6191-6201.
[21] Du Q, Liu H Z, Feng J W, et al. Carbon dioxide exchange processes over the grassland ecosystems in semiarid areas of China. Science China: Earth Sciences, 2012, 42(5): 711-722.
杜群, 刘辉志, 冯健武, 等. 半干旱区草原生态系统的碳交换特征. 中国科学: 地球科学, 2012, 42(5): 711-722.
[22] Hogberg P, Nordgren A, Buchmann N, et al. Large-scale forest girdling shows that current photosynthesis drives soil respiration. Nature, 2001, 411(6839): 789-792.
[23] Zhang L H, Song C C, Wang D X.Effects of nitrogen fertilization on carbon balance in the freshwater marshes. Environmental Science, 2006, 27(7): 1257-1263.
张丽华, 宋长春, 王德宣. 氮输入对沼泽湿地碳平衡的影响. 环境科学, 2006, 27(7): 1257-1263.
[24] Li F, Li Q, Xue H X, et al. The impact of temperature on carbon flux over Stipa krylovii ecosystem during the growing season. Journal of Agro-Environment Science, 2012, 31(7): 1453-1459.
李峰, 李琪, 薛红喜, 等. 温度对克氏针茅草原生态系统生长季碳通量的影响. 农业环境科学学报, 2012, 31(7): 1453-1459.
[25] Wang C L, Zhou G Y, Wang X, et al. Below-canopy CO₂ flux and its environmental response characteristics in a coniferous and broad-leaved mixed forest in Dinghushan, China. Acta Ecologica Sinica, 2007, 27(3): 846-854.
王春林, 周国逸, 王旭, 等. 鼎湖山针阔叶混交林冠层下方CO₂通量及其环境响应. 生态学报, 2007, 27(3): 846-854.
[26] Huang X Z, Hao Y B, Wang Y F, et al. Impact of extreme drought on net ecosystem exchange from Leymus chinensis steppe in Xilin River Basin, China. Journal of Plant Ecology, 2006, 30(6): 894-900.
黄祥忠, 郝彦宾, 王艳芬, 等. 极端干旱条件下锡林河流域羊草草原净生态系统碳交换特征. 植物生态学报, 2007, 30(6): 894-900.
[27] Xu L J, Tang H J, Yang G X, et al. Variation of net ecosystem carbon flux and its impact factors on Stipa baicalensis steppe in the growing season. Acta Prataculturae Sinica, 2011, 20(6): 287-292.
徐丽君, 唐华俊, 杨桂霞, 等. 贝加尔针茅草原生态系统生长季碳通量及其影响因素分析. 草业学报, 2011, 20(6): 287-292.

农牧交错带半干旱草地生态系统CO₂交换对短期不同水平氮添加的响应

Short term effects on ecosystem CO₂ exchange in a semi-arid grassland agro-pastoral ecotone, following differing levels of nitrogen application

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 5

编辑推荐

Metrics

[1]	程序,朱万斌. 北方农牧交错带以开发能源作物促生态重建的前景[J]. 草业学报, 2012, 21(6): 1-7.
[2]	刘睿,孙九林,张金区,王卷乐,廖秀英 (1.资源与环境信息系统国家重点实验室中国科学院地理科学与资源研究所,北京 100101;2.重庆师范大学地理科学学院, 重庆 400047;3.中国科学院研究生院,北京 100049). 中国北方草地覆被的HJ星NDVI校正研究[J]. 草业学报, 2011, 20(1): 189-198.
[3]	郭彦军,倪郁,韩建国. 农牧交错带人工种草对土壤磷素有效性的影响[J]. 草业学报, 2010, 19(2): 169-174.
[4]	吕玉华,郑大玮. 内蒙古农牧交错带农牧系统耦合及相悖的机理及效应[J]. 草业学报, 2009, 18(4): 217-223.
[5]	冯丽肖,杜雄,张立峰. 华北农牧交错带畜牧业外部经济效应解析[J]. 草业学报, 2009, 18(2): 155-162.