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Response of Microbial Communities in Soil to Multi-level Warming in a Highland Barley System of the Lhasa River

Journal of Resources and Ecology 2019年第4期10卷 373-378页

作者： FU Gang SUN Wei LI Shaowei ZHONG Zhiming 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

No studies have examined the effect of experimental warming on the microbial biomass and community composition of soil in agricultural ecosystem on the Qinghai-Tibet Plateau. Thus it is unclear whether the influences of experimental warming on microbial communities in soil are related to warming magnitude in croplands on this Plateau. This study performed warming experiment(control, low-and high-level) in a highland barley system of the Lhasa River in May 2014 to examine the correlation between the response of microbial communities in soil to warming and warming magnitude. Topsoil samples(0–10 and 10–20 cm) were collected on September 14, 2014. Experimental warming at both low and high levels significantly increased soil temperature by 1.02 ℃ and 1.59 ℃, respectively at the depth of 15 cm. Phospho lipid fatty acid(PLFA) method was used to determine the microbial community in soil. The low-level experimental warming did not significantly affect the soil’s total PLFA, fungi, bacteria, arbuscular mycorrhizal fungi(AMF), actinomycetes, gram-positive bacteria(G+), gram-negative bacteria(G–), protozoa, the ratio of fungi to bacteria(F/B ratio), and ratio of G+ to G–(G+/G– ratio) at the 0–10 and 10–20 cm depth. The low-level experimental warming also did not significantly alter the composition of microbial community in soil at the 0–10 and 10–20 cm depth. The high-level experimental warming significantly increased total PLFA by 74.4%, fungi by 78.0%, bacteria by 74.0%, AMF by 66.9%, actinomycetes by 81.4%, G+ by 67.0% and G– by 74.4% at the 0–10 cm depth rather than at 10–20 cm depth. The high-level experimental warming significantly altered microbial community composition in soil at the 0–10 cm depth rather than at 10-20 cm depth. Our findings suggest that the response of microbial communities in soil to warming varied with warming magnitudes in the highland barley system of the Lhasa River.

关键词： infrared heater microbial biomass phospho lipid fatty acid warming level

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VHR GeoEye-1 imagery reveals an ancient water landscape at the Longcheng site,northern Chaohu Lake Basin(China)

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International Journal of Digital Earth 2017年第2期10卷 139-154页

作者： Lei Luo Xinyuan Wang Jie Liu Huadong Guo Xin Zong Wei Ji Hui Cao Key Laboratory of Digital Earth Science Institute of Remote Sensing and Digital EarthChinese Academy of SciencesBeijingPeople’s Republic of China Institute of Remote Sensing and Digital Earth University of Chinese Academy of SciencesBeijingPeople’s Republic of China International Centre on Space Technologies for Natural and Cultural Heritage BeijingPeople’s Republic of China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijingPeople’s Republic of China

This study mainly focuses on revealing an ancient water landscape at the Longcheng site in the northern Chaohu Lake Basin using very highresolution(VHR)GeoEye-1 ***,prior to classification,the GeoEye-1 image was processed following atmospheric and geometric *** supervised classification was carried out in order to show the land-cover situation in the Longcheng *** overall classification accuracy was 89.98%,with a kappa coefficient of *** moat system around the city walls was discovered by using rule-based objectoriented segmentation of the postclassified image,and the other walls of ancient Longcheng were manually identified from the pansharpened VHR GeoEye-1 ***,a map of the ancient water landscape containing the ancient city,wall and moat at the Longcheng site was *** paper demonstrates that VHR remote sensing has the ability to uncover an ancient water landscape and provide new insights for archaeological and paleoenvironmental studies.

关键词： VHR remote sensing archaeological classification segmentation GeoEye-1 Longcheng

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Nitrogen mobility,ammonia volatilization,and estimated leaching loss from long-term manure incorporation in red soil

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Journal of Integrative Agriculture 2017年第9期16卷 2082-2092页

作者： HUANG Jing DUAN Ying-hua XU Ming-gang ZHAI Li-mei ZHANG Xu-bo WANG Bo-ren ZHANG Yang-zhu GAO Su-duan SUN Nan College of Resources and Environment Hunan Agricultural UniversityChangsha 410128P.R.China Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences(CAAS)/National Engineering Laboratory for Improving Quality of Arable LandBeijing 100081P.R.China Red Soil Experimental Station of CAAS in Hengyang/National Observation and Research Station of Farmland Ecosystem in Qiyang Qiyang 426182P.R.China Key Laboratory of Ecosystem Network Observation and Modeling/Yucheng Comprehensive Experiment Station Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101P.R.China USDA Agricultural Research Service San Joaquin Valley Agricultural Sciences CenterCA 93648-9757USA

Nitrogen（N） loss from fertilization in agricultural fields has an unavoidable negative impact on the environment and a better understanding of the major pathways can assist in developing the best management practices. The aim of this study was to evaluate the fate of N fertilizers applied to acidic red soil（Ferralic Cambisol） after 19 years of mineral（synthetic） and manure fertilizer treatments under a cropping system with wheat-maize rotations. Five field treatments were examined： control（CK）, chemical nitrogen and potash fertilizer（NK）, chemical nitrogen and phosphorus fertilizer（NP）, chemical nitrogen, phosphorus and potash fertilizer（NPK） and the NPK with manure（NPKM, 70% N from manure）. Based on the soil total N storage change in 0–100 cm depth, ammonia（NH_3） volatilization, nitrous oxide（N_2O） emission, N plant uptake, and the potential N leaching loss were estimated using a mass balance approach. In contrast to the NPKM, all mineral fertilizer treatments（NK, NP and NPK） showed increased nitrate（NO_3~–） concentration with increasing soil depth, indicating higher leaching potential. However, total NH_3 volatilization loss was much higher in the NPKM（19.7%） than other mineral fertilizer treatments（≤4.2%）. The N_2O emissions were generally low（0.2–0.9%, the highest from the NPKM）. Total gaseous loss accounted for 1.7, 3.3, 5.1, and 21.9% for NK, NP, NPK, and NPKM treatments, respectively. Estimated N leaching loss from the NPKM was only about 5% of the losses from mineral fertilizer treatments. All data demonstrated that manure incorporation improved soil productivity, increased yield, and reduced potential leaching, but with significantly higher NH_3 volatilization, which could be reduced by improving the application method. This study confirms that manure incorporationis an essential strategy in N fertilization management in upland red soil cropping system.

关键词： soil NO_3~–-N ammonia volatilization nitrogen leaching long-term field experiment mass balance nitrous oxide emission

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Erratum to: Effects of nitrogen deposition and fertilization on N transformations in forest soils: a review

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Journal of Soils and Sediments 2015年第5期15卷 1233-1234页

作者： Wenlong Gao Hao Yang Liang Kou Shenggong Li Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China University of Chinese Academy of Sciences Beijing China

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Short-term variations of vapor isotope ratios re- veal the influence of atmospheric processes

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Journal of Geographical Sciences 2011年第3期21卷 401-416页

作者： ZHANG Shichun SUN Xiaomin WANG Jianlin YU Guirui WEN Xuefa Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research CAS Beijing 100101 China Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and Agroecology CAS Changchun 130012 China Qingdao Agricultural University Qingdao 266109 Shandong China

Stable isotopes of atmospheric water vapor reveal rich information on water movement and phase changes in the atmosphere. Here we presented two nearly continuous time-series of δD and δ18O of atmospheric water vapor （δv） measured at hourly intervals in surface air in Beijing and above a winter wheat canopy in Shijiazhuang using in-situ measurement technique. During the precipitation events, the δv values in both Beijing and Shijiazhuang were in the state of equilibrium with precipitation water, revealing the influence of precipitation processes. However, the δv departures from the equilibrium state were positively correlated with local relative humidity. Note that the δv tended to enrich in Beijing, but deplete in Shijiazhuang during the precipitation events, which mainly resulted from the influence of transpiration processes that enriched the δv in Shijiazhuang. On seasonal time-scale, the δv values were log-linear functions of water vapor mixing ratios in both Beijing and Shijiazhuang. The water vapor mixing ratio was an excellent predictor of the δv by the Rayleigh distillation mechanisms, indicating that air mass advection could also play an important role in determining the δv. On a diurnal time-scale, the δv reached the minimum in the early afternoon hours in Beijing which was closely related to the atmospheric processes of boundary layer entrainment. During the peak of growing season of winter wheat, however, the δv reached the minimum in the early morning, and increased gradually through the daytime, and reached the maximum in the late afternoon, which was responsible by the interaction between boundary layer entrainment and the local atmospheric processes, such as transpiration and dew formation. This study has the implications for the important role of vegetation in determining the surface δv and highlights the need to conduct δv measurement on short-term （e.g. diurnal） time scales.

关键词： stables isotopes atmospheric water vapor precipitation TDLAS

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The Impacts of Climate Change and Human Activities on Cropland Net Primary Productivity in Bangladesh,India and Myanmar

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Journal of Resources and Ecology 2024年第4期15卷 814-825页

作者： WANG Chunyu WANG Junbang School of Geography and Tourism Qilu Normal UniversityJinan 250200China National Ecosystem Science Data Center Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

Under global change and climate variations,determining the impacts of climate change and human activities on cropland net primary productivity(NPP)in Bangladesh,India and Myanmar(BIM)is of great significance for identifying yield-limiting factors,making adaptive agricultural management plans,and improving *** on the GLOPEM-CEVSA model,through an integration of remote sensing data and LAI simulation,we investigated the impacts and spatiotemporal changes of water and human activities on BIM from 1982 to *** types of cropland NPPs were considered:actual NPP(NPPA),NPP affected by temperature and water(NPPWT),and NPP only affected by temperature(NPPT).Our analysis revealed that the water factor plays a predominant role in determining the NPP level in the *** variability was found to be conducive to NPPT,exhibiting an increasing trend of 10.66 g C m^(-2) yr^(-1).However,this trend was partially offset by precipitation variability,resulting in a net increase of 0.96 g C m^(-2) yr^(-1).In comparing temperature-driven NPP to temperature and water-driven NPP,water stress caused NPPT to decrease by 65.46% compared to NPPWT for the entire *** NPP in northwestern India and the central Deccan Plateau were significantly affected by water ***,the influence of water on NPP in the BIM exhibited a substantial upward trend from 1982 to 2015,with Myanmar experiencing the most significant *** gap between NPPWT and NPPA in BIM demonstrated a notable decreasing trend during the same period,underscoring the positive impact of human activities on *** drawn from our findings suggest that with the implementation of rational and efficient crop management practices,there is a 36.80% potential improvement in NPPA compared to NPPWT in the BIM region,with India and Myanmar showing potential increases of 39.20% and 38.29%,*** insights provide guidance for practical measures aimed at water resource management to en

关键词： NPP climate change human activities water stress GLOPEM-CEVSA model Bangladesh India Myanmar

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Estimating air temperature of an alpine meadow on the Northern Tibetan Plateau using MODIS land surface temperature

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Acta Ecologica Sinica 2011年第1期31卷 8-13页

作者： Gang Fu Zhenxi Shen Xianzhou Zhang Peili Shi Yangjian Zhang Jianshuang Wu 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 Graduate University of Chinese Academy of Sciences Beijing 100049 China

Meteorological data are scarce due to lack of meteorology stations in the Qinghai–Tibet Plateau. This often results in an imprecise estimation of air temperature. A linear estimation of air temperature of an alpine meadow on Northern Tibetan Plateau at heights of 1.5 m–2.1 m by using MODIS land surface temperature (LST) data was conducted in this study. The results showed that linear estimation of daily maximum and daytime mean air temperatures from MODIS LST data were not accurate enough ( P > 0.01, R 2 < 0.10) during the growing season. In contrast, the linear relationships between daily maximum and daytime mean air temperature and MODIS LST during the non-growing season were both significant ( P < 0.01, R 2 > 0.40). MODIS LST data were accurate enough to linearly estimate daily minimum and nighttime mean air temperatures ( P < 0.01, R 2 > 0.55). Moreover, derived LST from MODIS/Terra platform (MOD11A2) had higher accuracies than derived LST from MODIS/Aqua platform (MYD11A2) in linearly estimating air temperatures mentioned above. , MODIS , ( P > 0.01, R 2 < 0.10) ° , ( P < 0.01, R 2 > 0.40) ° , MODIS ( P < 0.01, R 2 > 0.55) ° MYD11A2 MOD11A2 .

关键词： Air temperature Land surface temperature MODIS Alpine meadow Northern Tibetan Plateau

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Response of Plant Growth and Biomass Accumulation to Short-term Experimental Warming in a Highland Barley System of the Tibet

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Journal of Resources and Ecology 2018年第2期9卷 203-208页

作者： FU Gang SUN Wei LI Shaowei ZHONG Zhiming Lhasa Plateau Ecosystem Research Station Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natu- ral Resources Research Chinese Academy of Sciences Beijing 100101 China

Highland barley is an important staple food in the Tibet,and the Tibetan Plateau is experiencing obvious climatic ***,few studies have examined the warming effects on highland barley growth and biomass allocation under conditions of controlled experimental *** limits our ability to predict how highland barley will change as the climate changes in the *** experiment of field warming at two magnitudes was performed in a highland barley system of the Tibet beginning in late May,*** heaters were used to increase soil *** the end of the warming experiment（September 14,2014）,plant growth parameters（plant height,basal diameter,shoot length and leaf number）,biomass accumulation parameters（total biomass,root biomass,stem biomass,leaf biomass and spike biomass）,and carbon and nitrogen concentration parameters（carbon concentration,nitrogen concentration,the ratio of carbon to nitrogen concentration in root,stem,leaf and spike）were *** low-and high-level experimental warming significantly increased soil perimental warming did not significantly *** low-and high-level experimental warming did not significantly affect plant growth parameters,biomass accumulation parameters,and carbon and nitrogen concentration *** were also no significant differences of plant growth parameters,biomass accumulation parameters,and carbon and nitrogen concentration parameters between the low-and high-level experimental *** findings suggest that the response of highland barley growth,total and component biomass accumulation,and carbon and nitrogen concentration to warming did not linearly change with warming magnitude in the Tibet.

关键词： plant growth infrared radiator Tibetan Plateau warming magnitude

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modeling gross primary productivity of alpine meadow in the northern Tibet Plateau by using MODIS images and climate data

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Acta Ecologica Sinica 2010年第5期30卷 264-269页

作者： Gang Fu Zhenxi Shen Xianzhou Zhang Songcai You Jianshuang Wu Peili Shi 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 Graduate University of Chinese Academy of Sciences Beijing 100049 China

The Vegetation Photosynthesis Model (VPM) was used to simulate the gross primary productivities ( GPP ) of the alpine meadow ecosystem in the northern Tibet Plateau at three different spatial resolutions of 0.5 km, 1.5 km and 2.5 km, respectively. The linear relationships between enhanced vegetation indices ( EVI ) and GPP , with higher correlative coefficients, were better than those between normalized difference vegetation indices ( NDVI ) and GPP at the three resolutions. VPM could well simulate the seasonal changes and inter-annual variations of GPP , with similar trends at the three resolutions. There were significant differences ( P < 0.0001) among the three modeled GPP with the three resolutions. Therefore, the modeled GPP at high resolution could not be directly extrapolated to low resolution, and vice versa. The contribution levels of different model parameters, including photosynthetically active radiation ( PAR ), air temperature ( Ta ), NDVI , EVI and land surface water indices ( LSWI ), to modeled GPP could vary with spatial resolution based on multiple stepwise linear regression analysis. This indicated that it was important to choose parameters properly and consider their effects on modeled GPP .

关键词： Vegetation Photosynthesis Model (VPM) Northern Tibet Plateau Alpine meadow Gross primary productivity ( GPP )

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Influences of drought on the stability of an alpine meadow ecosystem

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ecosystem Health and Sustainability 2022年第1期8卷 511-522页

作者： Tao Zhang Ximeng Ji Mingjie Xu Guang Zhao Zhoutao Zheng Yuanyuan Tang Ning Chen Juntao Zhu Yongtao He Yangjian Zhang College of Agronomy Shenyang Agricultural UniversityShenyangLiaoningChina Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijingChina Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchunJilinChina Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth SciencesBeijingChina College of Resources and Environment University of Chinese Academy of SciencesBeijingChina

Drought plays a prominent role in affecting ecosystem stability and ecosystem *** on eddy covariance and climatic observations during 2012-2020,the Fisher discriminant analysis method was employed to accurately detect drought ***,the ecosystem water sensitivity and its resistance to drought were quantified to evaluate the ecosystem *** results showed that the alpine meadow suffered drought most frequently at the beginning of the growing ***,drought during the peak growing seasons reduced the gross primary productivity(GPP)the most,by 30.5±15.2%.In the middle of the peak growing seasons,the ecosystem water sensitivity was weak,and thus,the resistance to drought was strong,which resulted in high ecosystem *** the beginning and end of the peak growing seasons,the ecosystem stability was relatively *** stability was positively related to the corresponding multiyear average soil water content(SWC_(ave)).However,drought occurring during high SWC_(ave)periods led to larger reductions in GPP,which indicated that the inhibitory effects of drought on ecosystems were more dependent on the occurrence time of droughts than on ecosystem stability.

关键词： Water sensitivity resistance grassland Tibetan Plateau Fisher discriminant analysis

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