PDF Download

[1]Zhang Xinyu,Fang Zhao,Jiao Feng.Analysis on the Impact of Nitrogen Addition on Carbon Dynamics in Inner Mongolia Meadows and Desert Grasslands Based on the DNDC Model[J].Research of Soil and Water Conservation,2024,31(05):84-92,101.[doi:10.13869/j.cnki.rswc.2024.05.025]

Copy

Analysis on the Impact of Nitrogen Addition on Carbon Dynamics in Inner Mongolia Meadows and Desert Grasslands Based on the DNDC Model

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 31 Number of periods: 2024 05 Page number: 84-92,101 Column: Public date: 2024-08-10

Title:: Analysis on the Impact of Nitrogen Addition on Carbon Dynamics in Inner Mongolia Meadows and Desert Grasslands Based on the DNDC Model

Author(s):: Zhang Xinyu, Fang Zhao, Jiao Feng; (Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China)

Keywords:: Inner Mongolia grassland; carbon dynamics; DNDC model; nitrogen addition

CLC:: S812

DOI:: 10.13869/j.cnki.rswc.2024.05.025

Abstract:: [Objective]The aims of this study are to determine the changes of plant biomass carbon and soil organic carbon in different grassland types in Inner Mongolia under the background of nitrogen deposition, and to investigate the applicability of the DNDC model to simulate the carbon dynamics of grasslands in this region, which is of great significance for mitigating climate change and achieving the goal of the ‘dual-carbon strategy'. [Methods]The response of Inner Mongolian meadows and desert grasslands to nitrogen deposition was investigated and verified by simulation using the DNDC model. The effects of nitrogen addition on carbon pools in different grasslands were analyzed by setting different gradients of nitrogen addition 〔0, 5, 10, 15, 20, 25, 30 gN/(m²·a)〕, and the differences in their simulations by the DNDC model were evaluated. [Results](1)Compared with the control, nitrogen addition promoted aboveground biomass carbon in meadow grassland and desert grassland, with an average increase of 72.68% and 66.52%, respectively, and the belowground biomass C of meadow grassland reached the maximum under N₅ treatment(240.93 gC/kg), while the increase of the desert grassland was the largest under the N₄ treatment(129.67 gC/kg).(2)Compared with the control, nitrogen addition did not significantly affect belowground biomass carbon of the two grasslands, with a different response from that of above-ground biomass carbon. Nitrogen addition had no significant effect on the below-ground biomass carbon of the two types of grassland relative to the control group, and the response was different from that of the aboveground biomass carbon, but on the whole, the below-ground carbon showed the order:meadow grassland>desert grassland.(3)The effect of nitrogen addition on the soil organic carbon content of the two types of grassland was not significant, and there was no significant difference between the different treatments of nitrogen addition, and on the whole, soil organic carbon content of meadow grassland was higher than that of desert grassland,(4)The DNDC model was able to simulate the above-ground and below-ground biomass carbon and soil organic carbon of the meadow grassland and desert grassland in the study area better, and the simulated values of the model were basically consistent with the measured values, the coefficients of determination(R²)were 0.942 6, 0.756 8, 0.825 7, 0.523 8, and 0.909 9, respectively, 0.955 2, 0.861 0, 0.732 4, and the model efficiency coefficients E were 0.834 5, 0.674 8, 0.799 4, 0.428 8 and 0.873 1, 0.926 5, 0.716 8, 0.538 1, respectively. The simulation effect of the points was good on the whole, but for the simulation of the biomass carbon, the degree of agreement was better, and the simulation of the desert grassland was better than that of the meadow grassland. [Conclusion]Overall, nitrogen addition promotes the carbon sequestration capacity of different arid types of grasslands, and the DNDC model can better reflect the effects of nitrogen deposition on the two types of grasslands in Inner Mongolia, so the model can be used to simulate the biomass carbon and soil organic carbon of grassland ecosystems in Inner Mongolia.

References:: [1]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[J].中国农业科技导报,2014,16(2):1-8.
Liang Y, Ganjurjav, Zhang W N, et al. A review on effect of climate change on grassland ecosystem in China[J]. Journal of Agricultural Science and Technology, 2014,16(2):1-8.
[2]王多斌,籍常婷,林慧龙.基于DNDC模型的高寒草甸土壤有机碳含量动态研究[J].草业学报,2019,28(12):197-204.
Wang D B, Ji C T, Lin H L. A ‘denitrification-decomposition'(DNDC)model evaluation of alpine meadow soil carbon response to climate change[J]. Acta Prataculturae Sinica, 2019,28(12):197-204.
[3]段娜,李清河,多普增,等.植物响应大气氮沉降研究进展[J].世界林业研究,2019,32(4):6-11.
Duan N, Li Q H, Duo P Z, et al. Plant response to atmospheric nitrogen deposition:A research review[J]. World Forestry Research, 2019,32(4):6-11.
[4]Nadelhoffer K J. The potential effects of nitrogen deposition on fine-root production in forest ecosystems[J]. New Phytologist, 2000,147:131-139.
[5]Fang H J, Cheng S L, Yu G R, et al. Nitrogen deposition impacts on the amount and stability of soil organic matter in an alpine meadow ecosystem depend on the form and rate of applied nitrogen[J]. European Journal of Soil Science, 2014,65:510-519.
[6]Lu M, Zhou X H, Luo Y Q, et al. Minor stimulation of soil carbon storage by nitrogen addition:A meta-analysis[J]. Agriculture, Ecosystems & Environment, 2011,140(1-2):234-244.
[7]祁瑜,黄永梅,王艳,等.施氮对几种草地植物生物量及其分配的影响[J].生态学报,2011,31(18):5121-5129.
Qi Y, Huang Y M, Wang Y, et al. Biomass and its allocation of four grassland species under different nitrogen levels[J]. Acta Ecologica Sinica, 2011,31(18):5121-5129.
[8]Li W B, Jin C J, Guan D X, et al. The effects of simulated nitrogen deposition on plant root traits:A meta-analysis[J]. Soil Biology and Biochemistry, 2015,82:112-118.
[9]苏洁琼,李新荣,鲍婧婷.施氮对荒漠化草原土壤理化性质及酶活性的影响[J].应用生态学报,2014,25(3):664-670.
Su J Q, Li X R, Bao J T. Effects of nitrogen addition on soil physico-chemical properties and enzyme activities in desertified steppe[J]. Chinese Journal of Applied Ecology, 2014,25(3):664-670.
[10]贺云龙,齐玉春,彭琴,等.外源碳氮添加对草地碳循环关键过程的影响[J].中国环境科学,2018,38(3):1133-1141.
He Y L, Qi Y C, Peng Q, et al. Effects of exogenous carbon and nitrogen addition on the key process of carbon cycle in grassland ecosystem:A review[J]. China Environmental Science, 2018,38(3):1133-1141.
[11]Yue K, Peng Y, Peng C H, et al. Stimulation of terrestrial ecosystem carbon storage by nitrogen addition:A meta-analysis[J]. Scientific Reports, 2016,27,6:19895.
[12]李长生.陆地生态系统的模型模拟[J].复杂系统与复杂性科学,2004,1(1):49-57.
Li C S. Modeling terrestrial ecosystems[J]. Complex Systems and Complexity Science, 2004,1(1):49-57.
[13]王瑞利,张存厚,王明玖.基于DNDC模型的赛罕乌拉自然保护区草地生态系统碳动态[J].中国草地学报,2019,41(4):167-172.
Wang R L, Zhang C H, Wang M J. Study on carbon dynamics of grassland ecosystem in Saihanwula nature reserve based on DNDC model[J]. Chinese Journal of Grassland, 2019,41(4):167-172.
[14]Kang X M, Hao Y B, Li C S, et al. Modeling impacts of climate change on carbon dynamics in a steppe ecosystem in Inner Mongolia, China[J]. Journal of Soils and Sediments, 2011,11:562-576.
[15]金正亮,樊文韬,张璞进,等.氮素添加对不同放牧强度下荒漠草原生产力的影响[J].北方农业学报,2022,50(6):63-71.
Jin Z L, Fan W T, Zhang P J, et al. Influence of nitrogen addition on the productivity of desert steppe under different grazing intensities[J]. Journal of Northern Agriculture, 2022,50(6):63-71.
[16]郭旋,胡中民,李胜功,等.氮磷添加对内蒙古温带典型草原地下生物量的影响[J].生态学杂志,2021,40(4):929-939.
Guo X, Hu Z M, Li S G, et al. Effects of nitrogen and phosphorus additions on belowground biomass of temperate typical steppe in Inner Mongolia[J]. Chinese Journal of Ecology, 2021,40(4):929-939.
[17]鲍士旦.土壤农化分析[M].3版.北京:中国农业出版社,2000.
Bao S D. Soil and agricultural chemistry analysis[M].3rd Ed. Beijing:China Agriculture Press, 2000.
[18]熊毅,李庆逵.中国土壤[M].2版.北京:科学出版社,1987.
Xiong Y, Li Q K. Soils of China[M].2nd Ed. Beijing:Science Press, 1987.
[19]陈佐忠.中国典型草原生态系统[M].北京:科学出版社,2000.
Chen Z Z. Typical grassland ecosystems in China[M]. Beijing:Science Press, 2000.
[20]Wu X, Kang X M, Liu W J, et al. Using the DNDC model to simulate the potential of carbon budget in the meadow and desert steppes in Inner Mongolia, China[J]. Journal of Soils and Sediments, 2018,18:63-75.
[21]中华人民共和国农业部畜牧兽医司,全国畜牧兽医总站.中国草地资源[M].北京:中国科学技术出版社,1996.
Ministry of agriculture of the People's Republic of China animal husbandry Division, National Animal Husbandry and Veterinary Station. Rangeland resources of China[M]. Beijing:China Science and Technology Press, 1996.
[22]Zhao M, Zhang H X, Baskin C C, et al. Intra-annual species gain overrides species loss in determining species richness in a typical steppe ecosystem after a decade of nitrogen enrichment[J]. Journal of Ecology, 2022,110(8):1942-1956.
[23]李禄军,曾德慧,于占源,等.氮素添加对科尔沁沙质草地物种多样性和生产力的影响[J].应用生态学报,2009,20(8):1838-1844.
Li L J, Zeng D H, Yu Z Y, et al. Effects of nitrogen addition on grassland species diversity and productivity in Keerqin Sandy Land[J]. Chinese Journal of Applied Ecology, 2009,20(8):1838-1844.
[24]平晓燕,周广胜,孙敬松.植物光合产物分配及其影响因子研究进展[J].植物生态学报,2010,34(1):100-111.
Ping X Y, Zhou G S, Sun J S. Advances in the study of photosynthate allocation and its controls[J]. Chinese Journal of Plant Ecology, 2010,34(1):100-111.
[25]Tang Z S, Deng L, An H, et al. The effect of nitrogen addition on community structure and productivity in grasslands:A meta-analysis[J]. Ecological Engineering, 2017,99:31-38.
[26]Lee M, Manning P, Rist J, et al. A global comparison of grassland biomass responses to CO₂ and nitrogen enrichment[J]. Philosophical Transactions of the Royal Society of London Series B, Biological Sciences, 2010,365(1549):2047-2056.
[27]韩小雨,郭宁,李冬冬,等.氮添加对内蒙古不同草原生物量及土壤碳氮变化特征的影响[J].草业学报,2022,31(1):13-25.
Han X Y, Guo N, Li D D, et al. Effects of nitrogen addition on soil carbon and nitrogen and biomass change in different grassland types in Inner Mongolia[J]. Acta Prataculturae Sinica, 2022,31(1):13-25.
[28]Luo Q P, Gong J R, Yang L L, et al. Impacts of nitrogen addition on the carbon balance in a temperate semiarid grassland ecosystem[J]. Biology and Fertility of Soils, 2017,53:911-927.
[29]Bai W M, Wang Z W, Chen Q S, et al. Spatial and temporal effects of nitrogen addition on root life span of leymus chinensis in a typical steppe of Inner Mongolia[J]. Functional Ecology, 2008,22(4):583-591.
[30]于雯超,宋晓龙,王慧,等.氮沉降对草原凋落物分解的影响[J].农业资源与环境学报,2013,30(6):14-19.
Yu W C, Song X L, Wang H, et al. Advances in the effect of nitrogen deposition on grassland litter decomposition[J]. Journal of Agricultural Resources and Environment, 2013,30(6):14-19.

Similar References:

Memo

Last Update: 2024-08-10