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Nitrogen addition promotes soil carbon accumulation globally

Science China Life Sciences 2025年第1期 284-293页

作者： Xuemei Yang suhui ma Erhan Huang Danhua Zhang Guoping Chen Jiangling Zhu Chengjun Ji Biao Zhu Lingli Liu Jingyun Fang Institute of Ecology College of Urban and Environmental Sciencesand Key Laboratory for Earth Surface Processes of the Ministry of EducationPeking University Ministry of Education Key Laboratory for Transboundary Ecosecurity of Southwest China School of Ecology and Environmental ScienceYunnan University State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of Sciences

Soil is the largest carbon(C) reservoir in terrestrial ecosystems and plays a crucial role in regulating the global C cycle and climate *** nitrogen(N) deposition has been widely considered as a critical factor affecting soil organic carbon(SOC) storage, but its effect on SOC components with different stability remains unclear. Here, we analyzed extensive empirical data from 304 sites worldwide to investigate how SOC and its components respond to N addition. Our analysis showed that N addition led to a significant increase in bulk SOC(6.7%), with greater increases in croplands(10.6%) and forests(6.0%) compared to grasslands(2.1%). Regarding SOC components, N addition promoted the accumulation of plant-derived C(9.7%–28.5%) over microbial-derived C(0.2%), as well as labile(5.7%) over recalcitrant components(–1.2%), resulting in a shift towards increased accumulation of plant-derived labile C. Consistently, N addition led to a greater increase in particulate organic C(11.9%) than mineral-associated organic C(3.6%), suggesting that N addition promotes C accumulation across all pools, with more increase in unstable than stable pools. The responses of SOC and its components were best predicted by the N addition rate and net primary productivity. Overall, our findings suggest that N enrichment could promote the accumulation of plant-derived and non-mineral associated C and a subsequent decrease in the overall stability of soil C pool, which underscores the importance of considering the effects of N enrichment on SOC components for a better understanding of C dynamics in soils.

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Changes in China's lakes: climate and human impacts

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National Science Review 2020年第1期7卷 132-140页

作者： Shengli Tao Jingyun Fang suhui ma Qiong Cai Xinyu Xiong Di Tian Xia Zhao Leqi Fang Heng Zhang Jiangling Zhu Shuqing Zhao Institute of Ecology College of Urban and Environmental Sciences and Key Laboratory for Earth Surface Processes of the Ministry of Education Peking University State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences School of Electronics Engineering and Computer Science Peking University

Lakes have played a critical role in providing water and ecosystem services for people and other organisms in China for millennia. However, accelerating climate change and economic boom have resulted in unprecedented changes in these valuable lakes. Using Landsat images covering the entity of the country, we explored the changes in China’s lakes and the associated driving forces over the last 30 years(i.e. mid-1980 s to 2015). We discovered that China’s lakes have changed with divergent regional trends: in the sparsely populated Tibetan Plateau, lakes are abundant and the lake area has increased dramatically from 38 596 to46 831 km~2(i.e. increased by 8235 km~2, or 21.3%), whereas, in the densely populated northern and eastern regions, lakes are relatively scarce and the lake area has decreased from 36 659 to 33 657 km~2(i.e. decreased by 3002 km~2, or 8.2%). In particular, severe lake decreases occurred in the Mongolia-Xinjiang Plateau and the Eastern Plain(-2151 km~2). Statistical analyses indicated that climate was the most important factor controlling lake changes in the Tibetan Plateau, the Yun-Gui Plateau and the Northeast Plain. However, the strength of climatic control on lake changes was low in the Eastern Plain and the Mongolia-Xinjiang Plateau, where human activities, e.g. impoldering, irrigation and mining, have caused serious impacts on lakes. Further lake changes will exacerbate regional imbalances between lake resources and population distribution, and thus may increase the risk of water-resource crises in China.

关键词： inland water sustainability population Landsat

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Aboveground biomass and its biotic and abiotic modulators of a main food bamboo of the giant panda in a subalpine spruce-fir forest in southwestern China

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Journal of Plant Ecology 2022年第1期15卷 1-12页

作者： Xinyu Xiong Jiangling Zhu Sheng Li Fan Fan Qiong Cai suhui ma Haojie Su Chengjun Ji Zhiyao Tang Jingyun Fang Institute of Ecology Peking UniversityBeijing 100871China Department of Ecology College of Urban and Environmental Sciencesand Key Laboratory for Earth Surface Processes of the Ministry of EducationPeking UniversityBeijing 100871China School of Life Sciences Peking UniversityBeijing 100871China

As one of the main food bamboo species of the giant panda(Ailuropoda melanoleuca),Fargesia denudata is widely distributed in the understory of spruce-fir forests in the mountainous area of southwestern ***,the driving factors of its biomass and distribution in the forests are still *** conducted a systematic investigation of the tree and shrub layers(including bamboos)of 209 subplots(20 m×20 m)in a Forest Global Earth Observatory plot,the Wanglang Plot(25.2 ha),to explore the effects of abiotic(topographic and soil characteristics)and biotic(tree density,total basal area(TBA),shrub coverage,etc.)factors on the aboveground biomass of ***(bamboo biomass hereafter).Bamboo biomass averaged 1.17 ton/ha,with a large variation from 0 to 4.88 ton/ha(95%confidence interval)among the 209 *** biomass increased significantly with elevation,slope and mean diameter at breast height of trees,and decreased significantly with tree density,shrub coverage and soil ***,bamboo biomass was not significantly correlated with tree TBA,aspect,soil organic matter or total nitrogen *** random forest model indicated that topographic factors and biotic factors had greater influences on the bamboo biomass than soil characteristics in ***,topographic factors mainly affected the bamboo biomass by changing tree density and soil *** results can provide valuable guidance for the protection of giant pandas and the management of subalpine spruce-fir forests.

关键词： aboveground biomass community structure Fargesia denudata spruce-fir forests topography

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A test of the mycorrhizal-associated nutrient economy framework in two types of tropical rainforests under nutrient enrichments

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Forest Ecosystems 2023年第1期10卷 12-20页

作者： Qingshui Yu suhui ma Xiaofeng Ni Lai Jiang Zhang Zhou Jiangling Zhu Chengjun Ji Zhiyao Tang Xiaoli Cheng Jingyun Fang Institute of Ecology College of Urban and Environmental SciencesKey Laboratory for Earth Surface Processes of the Ministry of EducationPeking UniversityBeijing100871China Research Institute of Tropical Forestry Chinese Academy of ForestryGuangzhou 510520China Key Laboratory of Soil Ecology and Health in Universities of Yunnan Province School of Ecology and Environmental ScienceYunnan UniversityKunming650091China

Shifts in tree species and their mycorrhizal associations driven by global change play key roles in biogeochemical cycles. In this paper, we proposed a framework of the mycorrhizal-associated nutrient economy(maNE), and tested it using nutrient addition experiments conducted in two tropical rainforests. We selected two tropical rainforests dominated by arbuscular mycorrhizal(AM) and ectomycorrhizal(ECM) trees, and established eighteen20 m×20 m plots in each rainforest. Six nitrogen(N) and phosphorus(P) addition treatments were randomly distributed in each rainforest with three replicates. We examined the differences in soil carbon(C) and nutrient cycling, plant and litter productivity between the two rainforests and their responses to 10-year inorganic N and P additions. We also quantified the P pools of plants, roots, litter, soil and microbes in the two rainforests. Overall,distinct maNE frameworks were applicable for tropical rainforests, in which soil C, N and P were cycled primarily in an inorganic form in the AM-dominated rainforest, whereas they were cycled in an organic form in the ECMdominated rainforest. Notably, the effects of mycorrhizal types on soil P cycling were stronger than those on C and N cycling. The intensified N and P deposition benefited the growth of AM-dominated rainforests instead of ECMdominated rainforests. Our findings underpin the key role of mycorrhizal types in regulating biogeochemical processes, and have important implications for predicting the ecological consequences of global changes.

关键词： Nutrient cycling Nutrient addition Mycorrhizal association Arbuscular mycorrhiza Ectomycorrhiza Tropical rainforest

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Soil respiration and its partitioning in different components in tropical primary and secondary mountain rain forests in Hainan Island,china

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Journal of Plant Ecology 2017年第5期10卷 791-799页

作者： Lai Jiang suhui ma Zhang Zhou Tianli Zheng Xingxing Jiang Qiong Cai Peng Li Jianxiao Zhu Yide Li Jingyun Fang Department of Ecology College of Urban and Environmental Scienceand Key Laboratory for Earth Surface Processes of the Ministry of EducationPeking UniversityNo.5 Yiheyuan Road Haidian DistrictBeijing 100871P.R.China Research Institute of Tropical Forestry Chinese Academy of Forestry682Guangshan 1 Rd.Tianhe DistrictGuangzhou 520510P.R.China

Aims Soil respiration is one of the most important components in the car-bon(c)cycle in terrestrial *** investigate the contribution of each component of c cycle to the total soil c efflux,we quantified the rates of litter,root,and other mineral soil respiration from 2012 to 2014 in the primary and secondary tropical mountain rain forests in Hainan Island,*** the seasonal dynamics of soil(Rs),non-litter(RNL)and non-root(RNR)respiration rates were measured using an automatic chamber system(Li-8100).Litter removal and root removal treatments were used to assess the contribution of litter and roots to belowground c *** estimated the annual c efflux of each compo-nent of soil respiration in primary and secondary forests using a temperature-based exponential model and analyzed the impact of each component in each forest *** Findingsthe annual total soil c efflux was significantly higher in the primary rain forest(1567±205 g c m^(−2)yr^(−1))than that in the secondary forest(1300±70 g c m^(−2)yr^(−1),Pmary rain forest,*** secondary forest,these three components contributed 11%(148±35 g c m^(−2)yr^(−1)),45%(572±259 g c m^(−2)yr^(−1)),and 44%(580±226 g c m^(−2)yr^(−1)),*** temperature sensitivity(Q10)of Rs(2.70±0.14)in the primary forest was significantly higher than that in the secondary forest(2.34±0.12),with the Q10 values for respiration decreasing in the order of RNR>Rs>*** results show that the difference in litter respiration between primary and secondary forest caused the major difference in annual soil respiration efflux between these two forest *** addition,the litter respiration is more sensitive to the soil temperature than the other soil respiration components.

关键词： soil respiration litter root mineral soil temperature sensitivity tropical mountain rain forest

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Family-level leaf nitrogen and phosphorus stoichiometry of global terrestrial plants

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Science China(Life Sciences) 2019年第8期62卷 1047-1057页

作者： Di Tian Zhengbing Yan suhui ma Yuehong Ding Yongkai Luo Yahan Chen Enzai Du Wenxuan Han Emoke Dalma Kovacs Haihua Shen Huifeng Hu Jens Kattge Bernhard Schmid Jingyun Fang College of Life Sciences Capital Normal UniversityBeijing100048China Institute of Ecology College of Urban and Environmental Sciencesand Key Laboratory for Earth Surface Processes of the Ministry ofEducationPeking UniversityBeijing100871China State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing100093China College of Resources Science&Technology and State Key Laboratory of Earth Surface Processes and Resource EcologyBeijing NormalUniversityBeijing100875China Key Laboratory of Plant-Soil Interactions Ministry of EducationCollege of Resources and Environmental SciencesChina AgriculturalUniversityBeijing100193China National Institute for Research and Development in Optoelectronics INCDO-INOE2000 Research Institute for Analytical InstrumentationICIA subsidiaryCluj-Napoca400293Romania max-Planck-Institute for Biogeochemistry Jena07745Germany Department of Evolutionary Biology and Environmental Studies University of ZurichZurich8057Switzerland

Leaf nitrogen(N) and phosphorus(P) concentrations are critical for photosynthesis, growth, reproduction and other ecological processes of plants. Previous studies on large-scale biogeographic patterns of leaf N and P stoichiometric relationships were mostly conducted using data pooled across taxa, while family/genus-level analyses are rarely reported. Here, we examined global patterns of family-specific leaf N and P stoichiometry using a global data set of 12,716 paired leaf N and P records which includes 204 families, 1,305 genera, and 3,420 species. After determining the minimum size of samples(i.e., 35 records), we analyzed leaf N and P concentrations, N:P ratios and N^P scaling relationships of plants for 62 families with 11,440 records. The numeric values of leaf N and P stoichiometry varied significantly across families and showed diverse trends along gradients of mean annual temperature(maT) and mean annual precipitation(maP). The leaf N and P concentrations and N:P ratios of 62 families ranged from 6.11 to 30.30 mg g–1, 0.27 to 2.17 mg g–1, and 10.20 to 35.40, respectively. Approximately 1/3–1/2 of the families(22–35 of 62) showed a decrease in leaf N and P concentrations and N:P ratios with increasing maT or maP, while the remainder either did not show a significant trend or presented the opposite pattern. Family-specific leaf N^P scaling exponents did not converge to a certain empirical value, with a range of 0.307–0.991 for 54 out of 62 families which indicated a significant N^P scaling relationship. Our results for the first time revealed large variation in the family-level leaf N and P stoichiometry of global terrestrial plants and that the stoichiometric relationships for at least one-third of the families were not consistent with the global trends reported previously. The numeric values of the family-specific leaf N and P stoichiometry documented in the current study provide critical synthetic parameters for biogeographic modeling and for further stud

关键词： leaf nitrogen (N) leaf phosphorus (P) plant stoichiometry family N:P ratios N^P scaling relationship climate

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多智能体系统事件触发一致性研究综述

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北京理工大学学报 2022年第10期42卷 1059-1072页

作者：张栋马苏慧吕石王孟阳唐硕西北工业大学航天学院陕西西安710072 陕西省空天飞行器设计重点实验室陕西西安710072

事件触发一致性控制是解决多智能体系统(multi-agent systems,maSs)一致性通信资源消耗问题的有效手段.本文简述了maSs事件触发一致性的基本框架,综述了maSs事件触发一致性问题所涉及的事件触发机制及设计策略、事件触发一致性的影响因... 详细信息

事件触发一致性控制是解决多智能体系统(multi-agent systems,maSs)一致性通信资源消耗问题的有效手段.本文简述了maSs事件触发一致性的基本框架,综述了maSs事件触发一致性问题所涉及的事件触发机制及设计策略、事件触发一致性的影响因素、Zeno行为和事件触发一致性应用4个方面的国内外研究进展,对未来研究方向进行了展望.

关键词：多智能体系统一致性事件触发机制 Zeno行为集群智能

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大学生应用脊髓反射区捏脊疗法改善功能性便秘的效果观察

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护理研究（上旬版） 2016年第8期30卷 2811-2813页

作者：张红马素慧华北理工大学护理与康复学院

[目的]探讨脊髓反射区捏脊疗法对大学生中度便秘的改善作用。[方法]对105名中度便秘大学生按随机数字表法分为对照组53人和干预组52人;对照组做空白对照,干预组予以4周的捏脊疗法,2周、4周后观察两组的便秘改善情况。[结果]干预组中度... 详细信息

[目的]探讨脊髓反射区捏脊疗法对大学生中度便秘的改善作用。[方法]对105名中度便秘大学生按随机数字表法分为对照组53人和干预组52人;对照组做空白对照,干预组予以4周的捏脊疗法,2周、4周后观察两组的便秘改善情况。[结果]干预组中度便秘大学生通过捏脊疗法,干预2周、4周时便秘症状总分低于对照组,差异有统计学意义(P<0.05)。[结论]脊髓反射区捏脊疗法可以改善大学生便秘的临床症状。

关键词：脊髓反射区捏脊疗法大学生功能性便秘

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脑卒中患者精神疲劳的影响因素分析

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中华行为医学与脑科学杂志 2018年第11期27卷 1006-1010页

作者：刘晓玲窦娜李丹马素慧华北理工大学护理与康复学院唐山063210

目的了解脑卒中患者精神疲劳的影响因素。方法采用以医院为基础的非配比病例对照研究的方法,选取唐山市工人医院神经内科住院的脑卒中患者358例,其中疲劳组175例(MFS评分≥10.5分)和非疲劳组183例(MFS评分<10.5分),采用精神疲劳自评量表... 详细信息

目的了解脑卒中患者精神疲劳的影响因素。方法采用以医院为基础的非配比病例对照研究的方法,选取唐山市工人医院神经内科住院的脑卒中患者358例,其中疲劳组175例(MFS评分≥10.5分)和非疲劳组183例(MFS评分<10.5分),采用精神疲劳自评量表(MFS)、简易智力检查量表(MMSE)、焦虑自评量表(SAS)、抑郁自评量表(SDS)、自制一般状况量表进行问卷调查。结果疲劳组的MFS总分及各维度得分均高于非疲劳组,总分[(17.68±5.06)分和(5.70±2.15)分],疲劳感知[(6.86±2.17)分和(2.12±1.15)分],认知疲倦[(3.58±1.54)分和(1.12±0.93)分],敏感性增加[(5.90±2.05)分和(1.95±1.20)分],睡眠改变[(1.35±0.82)分和(0.51±0.62)分];多因素Logistic回归分析显示:收入<支出(β=0.608,OR=1.836,95%CI=1.037~3.252)、有认知功能障碍(β=1.886,OR=6.594,95%CI=3.276~13.275)、轻度焦虑(β=0.770,OR=2.160,95%CI=1.069~4.364)、中度焦虑(β=1.157,OR=3.181,95%CI=1.230~8.228)、重度焦虑(β=1.295,OR=3.651,95%CI=1.096~12.160)、中度与重度抑郁(β=1.318,OR=3.738,95%CI=1.318~10.602)是脑卒中患者精神疲劳的主要影响因素。结论收入<支出、认知功能障碍、焦虑和中、重度抑郁是脑卒中患者发生精神疲劳的危险因素。

关键词：脑卒中精神疲劳影响因素

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急性冠脉综合征住院患者心理社会适应水平影响因素分析

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华北理工大学学报（医学版） 2018年第4期20卷 321-325页

作者：董嘉佳马素慧华北理工大学护理与康复学院河北唐山063000

(1)目的了解急性冠脉综合征患者心理社会适应水平及其影响因素。(2)方法选取在唐山市开滦总医院临床诊断为急性冠脉综合征患者342例进行问卷调查。内容包括疾病心理社会适应量表(PAIS-SR)、简易应对方式问卷及患者一般状况调查问卷,所... 详细信息

(1)目的了解急性冠脉综合征患者心理社会适应水平及其影响因素。(2)方法选取在唐山市开滦总医院临床诊断为急性冠脉综合征患者342例进行问卷调查。内容包括疾病心理社会适应量表(PAIS-SR)、简易应对方式问卷及患者一般状况调查问卷,所有数据录入Excel数据库,采用SPSS 17.0进行统计学处理。(3)结果单因素分析结果显示:性别、年龄、有无配偶、职业、医保类型、积极应对方式、消极应对方式是急性冠脉综合征患者心理社会适应水平的单因素,差异均有统计学意义(P<0.05);多因素分析结果显示:性别、有无配偶、积极应对方式、消极应对方式是急性冠脉综合征患者影响心理社会适应水平的多因素(P<0.05)。(4)结论女性、有配偶、积极的应对方式是患者心理社会水平的保护性因素,消极的应对方式是患者心理社会水平的危险性因素。

关键词：急性冠脉综合征心理社会适应影响因素

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