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Degradable film mulching increases soil carbon sequestration in major Chinese dryland agroecosystems

Nature communications 2025年第1期16卷 5029页

作者： Zihan Liu Chenxu Zhao Nanhai Zhang Jing Wang Zhaoyang Li Yves Uwiragiye Nyumah Fallah Thomas W Crowther Yuanyuan Huang Yi Xu Sheng Zhang Yakov Kuzyakov Kadambot H M Siddique Zhikuan Jia Zucong Cai Scott X Chang Minggang Xu Christoph Müller Yi Cheng School of Geography Nanjing Normal University 210023 Nanjing China. College of Agronomy Northwest A&F University 712100 Yangling China. Co-Innovation Center for Sustainable Forestry in Southern China College of Forestry Nanjing Forestry University 210037 Nanjing China. Department of Environmental Systems Science Institute of Integrative Biology ETH Zurich Zurich 8092 Switzerland. Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences 100101 Beijing China. College of Agronomy and Biotechnology China Agricultural University 100193 Beijing China. Geo-Biosphere Interactions Department of Geosciences University of Tübingen Tübingen 72076 Germany. Institute of Soil Science Chinese Academy of Sciences 210008 Nanjing China. Department of Soil Science of Temperate Ecosystems Department of Agricultural Soil Science University of Göttingen Göttingen 37077 Germany. Peoples Friendship University of Russia (RUDN University) Moscow 117198 Russia. The UWA Institute of Agriculture The University of Western Australia Perth WA 6001 Australia. College of Agronomy Northwest A&F University 712100 Yangling China. jiazhk@***. Department of Renewable Resources University of Alberta Edmonton AB T6G 2E3 Canada. Shanxi Province Key Laboratory of Soil Environment and Nutrient Resources Engineer and Technology Academy of Ecology and Environment Shanxi Agricultural University 030031 Taiyuan China. State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China Key Laboratory of Arable Land Quality Monitoring and Evaluation Ministry of Agriculture and Rural Affairs Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences 100081 Beijing China. Liebig Centre of Agroecology and Climate Impact Research Justus Liebig University Giessen Giessen 35392 Germany. Institute of Plant Ecology Justus Liebig Univer

Plastic film mulching (PM), which contributes to nearly half of the increased crop yields in dryland agroecosystems, exacerbates environmental burdens due to its non-degradable nature. Globally, there is a growing demand to replace non-degradable PM with degradable film mulching (DM), yet its impacts on soil organic carbon (SOC) in dryland agroecosystems remains unknown. Here, using multi-field studies and mesocosm experiments, we found that DM strongly increased but PM reduced SOC storage (0-1 m). This difference is likely attributable to the higher microbial C use efficiency in soil under DM, leading to increased microbial-derived C compared to PM. Under the high roading scenario for 2100, DM could reduce the decomposition of SOC (0-1 m) in China's drylands by 9.0 ± 1.0 Mg ha year (one standard error) compared with PM. Our findings highlight that DM is a promising alternative to PM for sequestrating SOC and alleviating C loss under climate change in dryland agroecosystems.

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Species-specific phenological responses to long-term nitrogen fertilization in an alpine meadow

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Journal of Plant Ecology 2017年第2期10卷 301-309页

作者： Tan-Feng Yin Li-Li Zheng Guang-Min Cao Ming-Hua Song Fei-Hai Yu Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesA11Datun RoadChaoyang DistrictBeijing 100101China School of Nature Conservation Beijing Forestry University35 East Qinghua RoadHaidian DistrictBeijing 100083China University of Chinese Academy of Sciences No.19 Yuquan RoadBeijing 100039China Northwest Institute of Plateau Biology Chinese Academy of Sciences59 Xiguan DajieXining 810008China

Aims Long-term nitrogen(N)fertilization has profound impacts on com-munity structure and ecosystem function,but little is known about its effects on plant ***,no published study has examined effects of N chemical forms on plant *** in an alpine meadow on the Tibetan Plateau,we monitored reproductive phenology of six common plant species after 8 years of fertilization with different N chemical forms(addition of 7.5 g N m^(−2) yr^(−1) in the forms of ammonium,nitrate and ammonium nitrate),with no N addition as the *** Findings Eight years of N fertilization affected plant reproductive phenology,and such effects depended on the species,N form and phenological *** with ammonium generally delayed,advanced or did not change flowering and fruiting phases of the alpine ***,fertilization with ammonium affected the temporal dispersion of reproductive phenology among the six species,espe-cially among the late-flowering *** could reduce the overlap of flowering and fruiting and increase phenological *** with nitrate only delayed the senescence phase of Elymus nutans,and fertilization with ammonium nitrate did not affect reproductive phenology of the six alpine plants.N fertilization with any form increased the overlap in senescence among the six *** conclude that long-term N fertilization can cause shifts in plant phenology and such effects depend on N chemical *** results also suggest that phenological comple-mentarity could be a mechanism underlying resource partitioning and thus species coexistence in the face of changing N availability with different chemical forms.

关键词： reproductive phenology fertilization nitrogen forms temporal dispersion in phenology alpine meadow

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Calling for Nexus Approach: Introduction of the Flagship Programme on Climate, ecosystems and Livelihoods

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Journal of Resources and Ecology 2018年第3期9卷 227-231页

作者： ZHANG Linxiu LIU Jian FU Chao International Ecosystem Management Partnership United Nations Environment Programme Beijing 100101 China Center for Chinese Agricultural Policy Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101China University of Chinese Academy of Sciences Beijing 100049 China United Nations Environment Programme P.O. Box 30552 Nairobi 00100 Kenya Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China

The United Nations Environment Programme（UN Environment） launched at the end of 2016 a decade-long（2016–2025） flagship programme on Climate, ecosystems and Livelihoods（CEL）, with the aim to assist developing countries in delivering the Sustainable Development Goals（SDGs） and climate targets while protecting their ecosystems and improving the livelihoods of their people. The CEL programme is a major initiative supported by China and other developing countries to promote long-term South-South cooperation, led by the United Nations Environment Programme International ecosystem Management Partnership（UNEP-IEMP）. This article presents the conceptual framework and implementation strategy of the CEL programme, which were proposed through consultations between UN Environment, Chinese and international experts. Within the conceptual framework, the CEL programme will 1） focus its work on the nexus of climate change, ecosystem services and sustainable livelihoods as the primary priority; 2） encourage cross-sectoral and multi-stakeholder cooperation, enhance interdisciplinary research, and strive for breakthroughs that cross disciplinary boundaries; 3） provide four types of services and products—monitoring and assessment, capacity building, technology demonstration, and science for policy through mainly South-South cooperation; and 4） have far-reaching impacts on delivering SDGs and climate targets in vulnerable developing countries. The CEL programme is going to be implemented in a strategic way through a set of related projects and initiatives. More particularly, it will 1） focus on fragile ecosystems like drylands, mountains, river basins and coastal zones in Asia, Africa and other key regions along the Belt and Road, in the early stage and expand to include some other regions at a later stage; 2） take a three-phase approach, including Phase I, Kick-off（2016–2018）, Phase II, Development（2019–2021）, and Phase III, Scaling-up（2022–2025）; and 3） draw on the globally relevant kn

关键词： Climate ecosystems and Livelihoods （CEL） nexus approach sustainable development goals（SDGs） South-South cooperation

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Exploring the relationship between vegetation and dust-storm intensity(DSI) in China

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Journal of Geographical Sciences 2016年第4期26卷 387-396页

作者：谈明洪 Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchCAS

It is difficult to estimate the effects of vegetation on dust-storm intensity （DSI） since land surface data are often recorded aerially while DSI is recorded as point data by weather stations. Based on combining both types of data, this paper analyzed the relationship be- tween vegetation and DSI, using a panel data-analysis method that examined six years of data from 186 observation stations in China. The multiple regression results showed that the relationship between changes in vegetation and variance in DSI became weaker from the sub-humid temperate zone （SHTZ） to dry temperate zone （DTZ）, as the average normalized difference vegetation index decreased in the four zones in the study area. In the SHTZ and DTZ zones, the regression model could account for approximately 24.9% and 8.6% of the DSI variance, respectively. Lastly, this study provides some policy implications for combating dust storms.

关键词： relationship dust-storm intensity land surface feature northern China

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modeling Aboveground Biomass Using MODIS Images and Climatic Data in Grasslands on the Tibetan Plateau

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Journal of Resources and Ecology 2017年第1期8卷 42-49页

作者： FU Gang SUN Wei LI Shaowei ZHANG Jing YU Chengqun SHEN Zhenxi Lhasa Plateau Ecosystem Research Station Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China School of geography Beijing Normal University Beijing 100875 China

Accurate quantification of aboveground biomass of grasslands in alpine regions plays an important role in accurate quantification of global carbon *** monthly normalized difference vegetation index（NDVI）,enhanced vegetation index（EVI）,mean air temperature（Ta）,≥5℃ accumulated air temperature（AccT）,total precipitation（TP）,and the ratio of TP to AccT（TP/AccT） were used to model aboveground biomass（AGB） in grasslands on the Tibetan *** stepwise multiple regression methods,including stepwise multiple regression of AGB with NDVI and EVI,stepwise multiple regression of AGB with Ta,AccT,TP and TP/AccT,and stepwise multiple regression of AGB with NDVI,EVI,Ta,AccT,TP and TP/Acc T were *** mean absolute error（MAE） and root mean squared error（RMSE） values between estimated AGB by the NDVI and measured AGB were 31.05 g m^（-2） and 44.12 g m^（-2）,and 95.43 g m^（-2） and 131.58 g m^（-2） in the meadow and steppe,*** MAE and RMSE values between estimated AGB by the AccT and measured AGB were 33.61 g m^（-2） and 48.04 g m^（-2） in the steppe,*** MAE and RMSE values between estimated AGB by the vegetation index and climatic data and measured AGB were 28.09 g m^（-2） and 42.71 g m^（-2）,and 35.86 g m^（-2） and 47.94 g m^（-2）,in the meadow and steppe,*** study finds that a combination of vegetation index and climatic data can improve the accuracy of estimates of AGB that are arrived at using the vegetation index or climatic *** accuracy of estimates varied depending on the type of grassland.

关键词： enhanced vegetation index normalized difference vegetation index air temperature precipitation alpine grassland

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Coupling Conservation and Livelihoods for Sustainable Management of Protected Areas in East Africa

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Journal of Resources and Ecology 2018年第3期9卷 266-272页

作者： FU Chao BAI Yunli ZHANG Linxiu WANG Shuai YAN Xue International Ecosystem Management Partnership United Nations Environment Programme Beijing 100101 China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Center for Chinese Agricultural Policy Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China University of Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical Garden Chinese Academy of Sciences Wuhan 430074 China

Strengthening research efforts to understand the combined impacts of conservation and livelihoods in protected areas（PAs） will increase the collective contribution that PAs can make towards meeting global goals for sustainable development in the next decade. As an example of such efforts, in 2014 the Chinese Academy of Sciences（CAS）, the Kenya Wildlife Service（KWS） and the United Nations Environment Programme（UN Environment） jointly initiated the ＂Sustainable Management of Protected Areas in East Africa＂ project. This paper provides a brief overview of the project＇s research background, goals and research tasks. The study is based on a look at the PA management system in East Africa and a review of the literature on the impact of PAs in the region. Results show that East African nations have expanded the coverage of PAs and established a complex set of PA management systems over the past century. The mandate for PAs in East African nations has changed recently from protecting biodiversity to alleviating poverty and supporting livelihoods. However, a combination of human activities and ecological processes inside and outside of PAs may not only impact biodiversity and ecosystem function over the long term, but also pose a threat to the capacity of PAs to maintain livelihoods and alleviate poverty in the local communities around them. The state of existing research in the field suggests there is an enormous need for additional research, the purpose of which is to help PA managers and policy-makers in East Africa understand how to achieve win-win outcomes for both ecosystems and human well-being. Against this background, the CAS-KWS-UN Environment joint research project aims to understand the dynamic interactions between ecosystems and human well-being around PAs in East Africa and identify good practices for PA management to reconcile conservation targets with the livelihood demands of local communities. It is intended that this research be shared with interested part

关键词： protected areas conservation livelihoods coupling East Africa

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Understanding Agriculture Production and Food Security in Ethiopia from the Perspective of China

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Journal of Resources and Ecology 2018年第3期9卷 237-249页

作者： LI Fadong LENG Peifang ZHANG Qiuying SONG Shuai QIAO Yunfeng GU Congke ZHANG Qian WU Liang Mulubrhan Balehegn Dagne Mojo ZHU Nong ZHAO Xin Key Laboratory of Ecosystem Network Observation and Modeling Chinese Academy of Seienceslnstitute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China International Ecosystem Management Partnership-United Nations Environment Programme （UNEP-IEMP） Beijing 100101 China Chinese Research Academy of Environmental Sciences Beijing 100012 China Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China College of Resources and Environment University of Chinese Academy of Sciences Beijing 100190 China Department of Animal Rangeland and Wildlife Sciences Mekelle University Mekelle 231 Ethiopia

Food security and sustainable agricultural development are the hot issues of scientific research, especially after the population affected by hunger surprisingly increased in 2016. Long-lasting and recurrent famines caused by natural disasters and wars have afflicted Ethiopia. Unlike Ethiopia, which is still struggling to achieve food self-sufficiency, China managed to quickly become food self-sufficient at a rapid speed, despite the fact that it also faced the same challenges of famine over the last century. In the backdrop of differing environmental and socio-political challenges the two countries face, comparing the similarities and differences between the two countries will yield important lessons and insights for Ethiopia to follow to achieve food self-sufficiency. Here, the progress towards food security in Ethiopia and China is presented to quantitatively compare the gap of agricultural production between both countries. We found that food production in Ethiopia is heavily constrained by drought, soil degradation, climate change, out-dated agricultural production technologies, and poverty. According to these challenges, we examined corresponding responses in China to propose solutions for achieving food self-sufficiency in Ethiopia, given the realities of its unique national situation.

关键词： food security agriculture production Ethiopia China self-sufficiency

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Response of soil CO_2 efflux to precipitation manipulation in a semiarid grassland

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Journal of Environmental Sciences 2016年第7期28卷 207-214页

作者： Xiaorong Wei Yanjiang Zhang Jian Liu Hailong Gao Jun Fan Xiaoxu Jia Jimin Cheng Mingan Shao Xingchang Zhang State Key Laboratory of Soil Erosion and Dryland Farming in the Loess Plateau Northwest A&F University College of Animal Science and Technology Northwest A&F University Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographical Sciences and Natural Resources ResearchChinese Academy of Sciences

Soil CO_2efflux（SCE） is an important component of ecosystem CO_2 exchange and is largely temperature and moisture dependent, providing feedback between C cycling and the climate system. We used a precipitation manipulation experiment to examine the effects of precipitation treatment on SCE and its dependences on soil temperature and moisture in a semiarid grassland. Precipitation manipulation included ambient precipitation, decreased precipitation（- 43%）, or increased precipitation（＋ 17%）. The SCE was measured from July2013 to December 2014, and CO_2 emission during the experimental period was *** response curves of SCE to soil temperature and moisture were analyzed to determine whether the dependence of SCE on soil temperature or moisture varied with precipitation manipulation. The SCE significantly varied seasonally but was not affected by precipitation treatments regardless of season. Increasing precipitation resulted in an upward shift of SCE–temperature response curves and rightward shift of SCE–moisture response curves,while decreasing precipitation resulted in opposite shifts of such response curves. These shifts in the SCE response curves suggested that increasing precipitation strengthened the dependence of SCE on temperature or moisture, and decreasing precipitation weakened such dependences. Such shifts affected the predictions in soil CO_2 emissions for different precipitation treatments. When considering such shifts, decreasing or increasing precipitation resulted in 43 or 75% less change, respectively, in CO_2 emission compared with changes in emissions predicted without considering such shifts. Furthermore, the effects of shifts in SCE response curves on CO_2 emission prediction were greater during the growing than the non-growing season.

关键词： Soil CO2 efflux response curve Soil moisture Soil temperature Precipitation regimes Semiarid grassland Soil CO2 efflux

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Estimating evaporation over a large and shallow lake using stable isotopic method: A case study of Lake Taihu

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Hupo Kexue/Journal of Lake Sciences 2017年第4期29卷 1009-1017页

作者： Xiao, Wei Fu, Jingru Wang, Wei Wen, Xuefa Xu, Jingzheng Xiao, Qitao Hu, Cheng Liu, Shoudong Li, Xuhui Yale-NUIST Center on Atmospheric Environment Nanjing University of Information Science and Technology Nanjing210044 China Nanjing University of Information Science and Technology Nanjing210044 China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing100101 China

Accurate estimation on lake evaporation was vital to hydrology, meteorology and limnology. Based on the data of water budgets, meteorological and stable isotopic observation over Lake Taihu from 2013 to 2015, the evaporation of Lake Taihu was estimated using the isotopic mass balance model, the water mass balance method and the Priestley-Taylor model. The seasonal and inter-annual variabilities of lake evaporation were analyzed, and the performance of the water balance method and the stable isotopic water balance model were evaluated with the Priestley-Taylor model result as reference. The results indicated: Evaporation of Lake Taihu was higher from May to September and less in winter. Annual evaporation in 2013, 2014 and 2015 was 1069, 894 and 935 mm, and the inter-annual variation was controlled by weather condition. Lake evaporation during the period from December 2013 to November 2014 calculated using the Priestley-Taylor model was 885 mm, and the result of the isotopic mass balance model was similar with a value of 893 mm. Whereas it was overestimated significantly by the water balance method with a value of 1247 mm. © 2017 by Journal of Lake Sciences.

关键词： Evaporation

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Assessing spatio-temporal variations of precipitation-use efficiency over Tibetan grasslands using MODIS and in-situ observations

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Frontiers of Earth Science 2016年第4期10卷 784-793页

作者： Zhengjia LIU Mei HUANG Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China State Key Laboratory of Remote Sensing Science Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences Beijing 100101 China

Clarifying the spatial and temporal variations in precipitation-use efficiency （PUE） is helpful for advancing our knowledge of carbon and water cycles in Tibetan grassland ecosystems. Here we use an integrated remote sensing normalized difference vegetation index （NDVI） and in-situ above-ground net primary production （ANPP） measurements to establish an empirical exponen- tial model to estimate spatial ANPP across the entire Tibetan Plateau. The spatial and temporal variations in PUE （the ratio of ANPP to mean annual precipitation （MAP））, as well as the relationships between PUE and other controls, were then investigated during the 2001- 2012 study period. At a regional scale, PUE increased from west to east. PUE anomalies increased significantly （〉 0.1 g.m^-***^-1/10 yr） in the southern areas of the Tibetan Plateau yet decreased （〉 0.02 g. m^-2. mm 1/10 yr） in the northeastern areas. For alpine meadow, we obtained an obvious breaking point in trend of PUE against elevation gradients at 3600 m above the sea level, which showed a contrasting relationship. At the inter-annual scale, PUE anomalies were smaller in alpine steppe than in alpine meadow. The results show that PUE of Tibetan grasslands is generally high in dry years and low in wet years.

关键词： normalized difference vegetation index（NDVI） Tibetan Plateau inter-annual variations alpinegrasslands exponential model

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