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SOC storage and potential of grasslands from 2000 to 2012 in central and eastern Inner Mongolia, China

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Journal of Arid Land 2016年第3期8卷 364-374页

作者： TIAN Zheng wu xiuqin DAI Erfu ZHAO Dongsheng Yanchi Research Station College of Soil and Water Conservation Beijing Forestry University Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences

Grassland ecosystem is an important component of the terrestrial carbon cycle system. Clear comprehension of soil organic carbon（SOC） storage and potential of grasslands is very important for the effective management of grassland ecosystems. Grasslands in Inner Mongolia have undergone evident impacts from human activities and natural factors in recent decades. To explore the changes of carbon sequestration capacity of grasslands from 2000 to 2012, we carried out studies on the estimation of SOC storage and potential of grasslands in central and eastern Inner Mongolia, China based on field investigations and MODIS image data. First, we calculated vegetation cover using the dimidiate pixel model based on MODIS-EVI images. Following field investigations of aboveground biomass and plant height, we used a grassland quality evaluation model to get the grassland evaluation index, which is typically used to represent grassland quality. Second, a correlation regression model was established between grassland evaluation index and SOC density. Finally, by this regression model, we calculated the SOC storage and potential of the studied grasslands. Results indicated that SOC storage increased with fluctuations in the study area, and the annual changes varied among different sub-regions. The SOC storage of grasslands in 2012 increased by 0.51×1012 kg C compared to that in 2000. The average carbon sequestration rate was 0.04×1012 kg C/a. The slope of the values of SOC storage showed that SOC storage exhibited an overall increase since 2000, particularly for the grasslands of Hulun Buir city and Xilin Gol League, where the typical grassland type was mainly distributed. Taking the SOC storage under the best grassland quality between 2000 and 2012 as a reference, this study predicted that the SOC potential of grasslands in central and eastern Inner Mongolia in 2012 is 1.38×1012 kg C. This study will contribute to researches on related methods and fundamental database, as well as pro

关键词： vegetation cover soil organic carbon potential soil organic carbon storage carbon sequestration MODIS data

Nutrient coordination mechanism of tiger nut induced by rhizosphere soil nutrient variation in an arid area, China

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Journal of Arid Land 2023年第10期15卷 1216-1230页

作者： TAN Jin wu xiuqin LI Yaning SHI Jieyu LI Xu School of Soil and Water Conservation Beijing Forestry UniversityBeijing 100083China

Tiger nut is a bioenergy crop planted in arid areas of northern China to supply oil and adjust the planting ***,in the western region of Inner Mongolia Autonomous Region,China,less water resources have resulted in a scarcity of available farmland,which has posed a huge obstacle to planting tiger *** of tiger nut on marginal land can effectively solve this *** fully unlock the production potential of tiger nut on marginal land,it is crucial for managers to have comprehensive information on the adaptive mechanism and nutrient requirement of tiger nut in different growth *** study aims to explore these key information from the perspective of nutrient coordination strategy of tiger nut in different growth periods and their relationship with rhizosphere soil *** fertilization treatments including no fertilization(N:P(nitrogen:phosphorous)=0:0),traditional fertilization(N:P=15:15),and additional N fertilizer(N:P=60:15)were implemented on marginal land in the Dengkou *** and soil samples were collected in three growth periods,including stolon tillering period,tuber expanding period,and tuber mature *** no fertilization,there was a significant correlation between N and P contents of tiger nut roots and tubers and the same nutrients in the rhizosphere soil(P<0.05).Carbon(C),N,and P contents of roots were significantly higher than those of leaves(P<0.05),and the C:N ratio of all organs was higher than those under other treatments before tuber maturity(P<0.05).Under traditional fertilization,there was a significant impact on the P content of tiger nut tubers(P<0.05).Under additional N fertilizer,the accumulation rate of N and P was faster in stolons than in tubers(P<0.05)with lower N:P ratio in stolons during the tuber expansion period(P<0.05),but higher N:P ratio in tubers(P<0.05).The limited availability of nutrients in the rhizosphere soil prompts tiger nut to increase the C:N ratio,improving N utilizat

关键词： tiger nut stoichiometry rhizosphere soil nitrogen addition marginal land

Spatiotemporal change of beneficiary area from wind erosion prevention service in the Ulan Buh Desert in 2008 and 2018

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Geography and Sustainability 2022年第2期3卷 119-128页

作者： Wenjie Hu xiuqin wu Kebin Zhang School of Soil and Water Conservation Beijing Forestry UniversityBeijing 100083China

The Ulan Buh Desert is one of the eight deserts in China that provides wind erosion prevention service(i.e.,the ecosystem;vegetation,production,and construction activities that promote sand fixation).It is significant for the construction of the national ecological barrier,and the protection of the ecological security in the Yellow River and North *** this study,we selected two representative years(2008 and 2018)and quantified wind erosion prevention service from the Ulan Buh Desert using the RWEQ ***,the HYSPLIT model was used to simulate the spatial flow process from the service supply area to the beneficiary area and to determine its *** specific dust reduction amount in the beneficiary area was then *** energy and the time-space relation of wind erosion prevention service in the areas that receive benefits from Ulan Buh Desert were compared before and after implementing environmental restoration *** results showed that:(1)the total amount of wind erosion prevention in the Ulan Buh Desert in 2018 was 2.12×10^(10)kg,which was 5.17 times higher than that in 2008;(2)in 2018,the distribution density of the flow path of wind erosion prevention service was lower than that in 2008,and the flow paths in each year were concentrated in the beneficiary areas with the path distribution frequency of less than 10%;(3)the total dust reduction in the downwind area of the Ulan Buh Desert in 2018 was higher than that in 2008,totaling 15.54 million *** Mongolia Autonomous Region and Shanxi Province had the most significant amount of dust reduction.

关键词： Wind erosion prevention service HYSPLIT model Beneficiary area Dust reduction capacity The Ulan Buh Desert

Misperception and pro-environmental behaviors of the Chinese public toward air pollution

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Chinese Journal of Population,Resources and Environment 2021年第2期19卷 171-181页

作者： xiuqin wu Ge wu Jinxiu Ding Ding Li Chin-Hsien Yu Hongxia Xu School of Economics Southwestern University of Finance and EconomicsChengdu611130China Institute of Development Studies Southwestern University of Finance and EconomicsChengdu611130China Department of Public Finance School of EconomicsXiamen UniversityXiamen361005China

This study analyzes the misperceptions of the Chinese public about air pollution levels and other potential predictors of participation in pro-environmental behaviors based on the 2013 Chinese General Social Survey(CGSS).In this paper,misperception is defined as the difference between subjective perceptions of air pollution and measurements through objective *** find that pessimistic respondents are more likely to participate in pro-environmental *** media use and evaluation of the environmental performance of the local government significantly stimulate pro-environmental *** results reveal that knowledge and concern about the environment can mitigate the negative effect of optimistic bias on pro-environmental *** regions where environmental information is widely available,environmental pessimists are especially more likely to participate in such *** finding suggests that the government should provide not only accurate information about environmental pollution but also relevant education to enhance the environmental awareness of the public and stimulate pro-environmental participation.

关键词： Misperception Optimism bias Pessimism bias Pro-environmental behaviors Air pollution

Detecting the storage and change on topsoil organic carbon in grasslands of Inner Mongolia from 1980s to 2010s

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Journal of Geographical Sciences 2014年第6期24卷 1035-1046页

作者： DAI Erfu ZHAI Ruixue GE Quansheng wu xiuqin Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Re- sources Research CAS Beijing 100101 China University of Chinese Academy of Sciences Beijing 100049 China Beijing Forestry University Beijing 100083 China

Soil carbon sequestration and potential has been a focal issue in global carbon research. Under the background of global change, the estimation of the size as well as its change of soil organic carbon（SOC） storage is of great importance. Based on soil data from the second national soil survey and field survey during 2011–2012, by using the regression method between sampling soil data and remote sensing data, this paper aimed to investigate spatial distribution and changes of topsoil（0–20 cm） organic carbon storage in grasslands of Inner Mongolia between the 1980 s and 2010 s. The results showed that：（1） the SOC storage in grasslands of Inner Mongolia between the 1980 s and 2010 s was estimated to be 2.05 and 2.17 Pg C, with an average density of 3.48 and 3.69 kg C·m–2, respectively. The SOC storage was mainly distributed in the typical steppe and meadow steppe, which accounted for over 98% of the total SOC storage. The spatial distribution showed a decreased trend from the meadow steppe, typical steppe to the desert steppe, corresponding to the temperature and precipitation gradient.（2） SOC changes during 1982–2012 were estimated to be 0.12 Pg C, at 7.00 g C·m–2·yr–1, which didn＇t show a significant change, indicating that SOC storage in grasslands of Inner Mongolia remained relatively stable over this period. However, topsoil organic carbon showed different trends of carbon source/sink during the past three decades. Meadow steppe and typical steppe had sequestered 0.15 and 0.03 Pg C, respectively, served as a carbon sink; while desert steppe lost 0.06 Pg C, served as a carbon source. It appears that SOC storage in grassland ecosystem may respond differently to climate change, related to vegetation type, regional climate type and grazing intensity. These results might give advice to decision makers on adopting suitable countermeasures for sustainable grassland utilization and protection.

关键词： surface soil organic carbon storage climate change spatial differences grassland in Inner Mongolia

Research and Practice of Software Engineering Students' Creative and Practical Ability Training Mode

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Research and Practice of Software Engineering Students' Crea...

The Research and Practice of Engineering Practice Ability Strategies with Computer Professional Education Based on CDIO

2013年教育技术与管理科学国际会议

作者： wu xiuqin Liu TieLiang School of Computer & Information Technology of Northeast Petroleum University

Software engineering has strong demand to students’ practical operating ability. However now, students’ learning and innovation practice ability are not positively related to the trend. How can this phenomenon appear? Well, our talent training model at present is responsible to it. In other word, we can say that too-much-emphasize-on-single and mainly-learning talent training model leads to some problems. In this article, some proposals have been put forward to reform software engineering students’ creative and practical ability training mode, such as, generally prompt innovation practice quality education following the instruction of the scientific educational concept, punning the basis of students’ innovation practice ability training on the basis of optimizing the course system, build a student after-class science and technology activity model on the purpose of training students’ innovation practice ability, and so on.

关键词： Engineering Education Higher Engineering Education Engineering Practice

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The Research and Practice of Engineering Practice Ability St...

2013年教育技术与管理科学国际会议

作者： wu xiuqin Liu TieLiang School of Computer & Information Technology of Northeast Petroleum University

CDIO is the newest research result of international engineering education reform in recent years. This article will explore the new system of integration which about CDIO and engineering practice ability for computer professional education. Be aimed at the main problem that the engineering practice training mode with computer professional education for current students of university, it proposed the new computer professional engineering practice training strategy in several areas such as curriculum, training projects and team building based on CDIO philosophy, in addition, it practiced the training strategy, and achieved well results.

关键词： CDIO Engineering Education Education Reform Computer Professional Education

来源： cnki会议评论

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内蒙古边际土地油莎豆种植及生产潜力评估

农业工程学报 2022年第2期38卷 289-295页

作者：张鑫彤吴秀芹北京林业大学水土保持学院北京100083 北京林业大学水土保持国家林业局重点实验室北京100083 北京林业大学水土保持学院宁夏盐池毛乌素沙地生态系统国家定位观测研究站北京100083

开展精细的区域边际土地分布研究并进行充分利用是缓解人地矛盾的重要途径之一。内蒙古土地沙化严重且生产力低下,边际土地分布广泛。近年来,油莎豆因其产量高、含油量高,种植及产业化发展迅速,成为保障中国粮油安全的重要优选作物之一... 详细信息

开展精细的区域边际土地分布研究并进行充分利用是缓解人地矛盾的重要途径之一。内蒙古土地沙化严重且生产力低下,边际土地分布广泛。近年来,油莎豆因其产量高、含油量高,种植及产业化发展迅速,成为保障中国粮油安全的重要优选作物之一。在内蒙古大量边际土地上推广油莎豆种植是解决土地沙化问题、土地利用率低等问题的新思路。基于此,研究基于多因子综合评价方法提取了内蒙古边际土地,并分析利用其种植新型油料作物油莎豆可产生的能源及经济效益。结果表明,内蒙古地区共有边际土地12.5万km^(2),其中一等边际土地面积为2.6万km^(2),主要分布于中部及东部巴彦淖尔市、包头市、锡林浩特市、通辽市等,以稀疏植被、农田与植被混合区为主;二等边际土地6.4万km^(2),分布于霍林郭勒市、乌海市等地,主要是以植被为主的农田与植被混合区;三等边际土地3.5万km^(2),主要分布在西部阿拉善盟的一些降水较少且交通便利程度低、开发难度大的沙漠边缘地带及一些各类条件均较差的复合限制区。在上述筛选出的边际土地种植油莎豆并提取食用油,将可获得食用油约1.59×10^(7)t;若用于提取生物质柴油,将可获得生物质能量1.87×10^(12)MJ,可替代4.47×10^(7)t燃料油。研究可为中国北方风沙区边际土地利用及油莎豆种植和推广,以缓解区域粮油资源及能源短缺问题等提供一定的科学依据和数据支撑。

关键词：作物边际土地油莎豆能源效益内蒙古自治区油料

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云南省建水县石漠化修复模式评价

北京大学学报（自然科学版） 2020年第6期56卷 1073-1080页

作者：肖林颖吴秀芹北京林业大学水土保持学院北京100083 北京林业大学水土保持国家林业局重点实验室北京100083 北京林业大学云南建水荒漠生态系统国家定位研究站建水654399

基于1992—2017年Landsat TM数据、建水县森林资源二类调查数据及云南省石漠化监测数据,借助Mann-Kendall突变分析和趋势分析等方法,探讨近25年云南省建水县植被的时空变化特征及不同石漠化修复模式下的植被恢复情况。结果表明:1)25年间... 详细信息

基于1992—2017年Landsat TM数据、建水县森林资源二类调查数据及云南省石漠化监测数据,借助Mann-Kendall突变分析和趋势分析等方法,探讨近25年云南省建水县植被的时空变化特征及不同石漠化修复模式下的植被恢复情况。结果表明:1)25年间,建水县植被覆盖整体上呈上升趋势,平均增速为0.065%/10a,以2008年为界,增速由之前的0.077%/10a增加到0.475%/10a;2)25年间,建水县植被覆盖呈增加趋势的区域、无显著变化区域及呈减少趋势的区域面积占比分别为55.32%,34.44%和10.24%;3)对于不同修复模式,在10年的修复时间范围内,纯生态林模式与混交生态林模式下植被恢复效果差别不大,而在25年的修复时间范围内,混交生态林模式下植被修复速率明显优于纯生态林修复模式,优势主要展现在修复后期。短期内,纯生态林模式中阔叶树和桤木的植被修复效果较好;从长期看,云南松和车桑子是较好的修复树种。混交生态林模式中,针叶混交林修复速率在10年和25年修复时间范围内均表现最优,是较好的混交模式。研究结果揭示了不同治理模式对植被恢复的效果,可为优化石漠化区域生态修复方法提供理论依据。

关键词：植被修复石漠化治理模式喀斯特归一化植被指数(NDVI) 树种