检索结果-南通市图书馆

Spatial patterns of farmland abandonment and its impact factors in the central Three Gorges Reservoir Area

Journal of Mountain Science 2018年第3期15卷 631-644页

作者： CHEN Ying-feng WANG Yu-kuan FU Bin WANG Hai-wen WANG Wei institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 China University of Chinese Academy of Sciences Beijing 100049 China Wanzhou Station of Reservoir Eco-environment Monitoring Chongqing 404020 China inner mongolia land surveying and planning institute Hohhot 010010 China Survey & planning institute of State Forestry Administration Beijing 100714 China

The severe farmland abandonment phenomena in China have tremendously decreased the farmland usage efficiency and caused a series of profound ecological and social outcomes. The complexity of farmland abandonment necessitates a systematic research on its patterns and impact factors to underpin the dynamics of problem as well as potential solutions. This paper took Wanzhou district in the central part of Three Gorges Reservoir Area as an example to study the spatial distribution patterns of abandoned farmland at three scales, i.e., town, village, and plot, and analyzed the influence from labor transfer and farmland circulation. We conducted a survey on the distribution patterns of abandoned farmland via questionnaires at town and village scales, together with the modeling and interpretation of high-resolution aerial images taken by unmanned aerial vehicles at plot scale. Our research discloses a strong relationship between the distribution of abandoned farmland and the distance from population center at different scales. At eithertown or village scale, the abandonment proportion was recognized the highest in mid-distance areas and lowest in close-distance areas, and the per capita area of abandoned farmland increased with the distance to downtown or township. At plot scale, abandonment proportion presented exponential growth with the distance to village center, whereas the abandoned farmland was mainly distributed in the areas with distance above 500 m from the village center. Moreover, we noticed that labor transfer and farmland circulation are two important factors that influence farmland abandonment. Labor's outbound transfer distance has a positive linkage with the possibility of farmland abandonment. Finally, it is recommended that development and adoption of corresponding policies on local urbanization and farmland circulation will facilitate to alleviate farmland abandonment.

关键词： Three Gorges Reservoir Area Farmland abandonment Spatial distribution pattern Labor transfer Cultivated farmland Multi-scale Unmanned aerial vehicle

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Co-incorporating green manure and crop straw increases crop productivity and improves soil quality with low greenhouse-gas emissions in a crop rotation

引用

The Crop Journal 2024年第4期12卷 1233-1241页

作者： Na Zhao Xiquan Wang Jun Ma Xiaohong Li Jufeng Cao Jie Zhou Linmei Wu Peiyi Zhao Weidong Cao Bayannur Academy of Agricultural and Animal Sciences Linhe 015400Inner MongoliaChina College of Agronomy Inner Mongolia Agricultural UniversityHohhot 010019Inner MongoliaChina College of Agriculture Nanjing Agricultural UniversityNanjing 210095JiangsuChina inner mongolia Academy of Agricultural&Animal Husbandry Sciences Hohhot 010031Inner MongoliaChina State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable land in Northern China/institute of Agricultural Resources and Regional planning Chinese Academy of Agricultural SciencesBeijing 100081China

In a nine-year field experiment in a wheat-maize-sunflower cropping system in Hetao Irrigation Area,inner mongolia,China,organic amendments applied as straw,manure,green manure,and the combination of green manure and straw increased wheat and maize yield,soil aggregate stability,and soil microbial activity in comparison with chemical fertilizer,without changing greenhouse gas emission intensity.

关键词： Green manure Straw Manure Soil organic carbon Soil quality Crop production Diversified cropping

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The Evaluation of Eco-environmental Sensitivity in Ordos City

引用

Asian Agricultural Research 2015年第2期7卷 66-73页

作者： Yanhong XU Xijun YAO Libo LU Haijiao FAN inner mongolia land Survey and planning institute

This paper aims to reveal the difference of eco-environmental sensitivity and its influencing factors in the study area through carrying out the eco-environmental sensitivity evaluation based on land ecological security for 8 counties of Ordos City. Using fragstats landscape pattern analysis,GIS space method and RS analysis,based on ground investigation,this paper uses information mining and data analysis to extract index data for every village in the study area,carry out comprehensive quantitative evaluation,and finally calculate the comprehensive scores of eco-environmental sensitivity of the areas. The paper concludes that the highly sensitive areas and extremely sensitive areas are mainly concentrated in the eastern region of the eastern hilly and gully region and southern region of the Mu Us Desert in Ordos. The main reasons include severe soil erosion in hilly and gully region and serious desertification in southern Mu Us Desert area. So it is necessary to strengthen ecological environment protection in local areas.

关键词： Ordos City Eco-environment Sensitivity evaluation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Remediation Mode for the Polluted land in inner mongolia

引用

Asian Agricultural Research 2015年第3期7卷 75-79页

作者： Xijun YAO Yanyu ZHANG Zhiyong WANG Yingying SUI inner mongolia land surveying and planning institute College of Ecological and Environmental Sciences Inner Mongolia Agricultural University China land surveying and planning institute / Key Laboratory of land Use of the Ministry of land and Resources Baotou Soil and Fertilizer Station inner mongolia Academy of Forestry Sciences

This paper discusses the method of contaminated soil remediation technologies at home and abroad,analyzes the soil restoration situation in inner mongolia,and puts forward some suggestions on the development direction of soil repair industry for inner *** research methods of this article include literature review,summarization of data,comparison and analysis,and generalization and *** soil restoration has made certain achievements in inner mongolia in recent *** the technical level and policy level are still very imperfect,having not reached the national *** recommendations are *** first is to improve soil repair local laws,regulations and technical *** second is to increase investment in scientific research in the field of soil restoration,and the introduction of new technology,to encourage independent *** third is to fix soil combined with related industrial projects and avoid redundant *** last one is to intensify propaganda to improve public consciousness of the soil pollution prevention and control.

关键词： land pollution Remediation mode Recommendations In

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Evaluation of Arable land Reserve Resources and Analysis of Restrictive Factors: A Case Study of Hangjin Banner in inner mongolia

引用

Asian Agricultural Research 2015年第6期7卷 46-50页

作者： Xia YANG Xiangjun YUN land surveying and planning institute of inner mongolia Autonomous Region Grassland Research institute CAAS

Taking land available for cultivation and mining land available for reclamation in Hangjin Banner of inner mongolia Autonomous Region,using land use database of 2012 as evaluation base,it made evaluation of arability of 677 021. 40 hm2 reserve land resources by the restrictive factor evaluation method. Besides,it analyzed main restrictive factors of arable land reserve resources in Hangjin Banner. Results indicate that the total area arable land reserve resources is 52 200. 02 hm2,accounting for 7. 71% of total area evaluated. Irrigation condition and soil thickness are major factors restricting development of arable land reserve resources in the study area. It is expected to provide reference for development of arable land reserve resources and land consolidation project in Hangjin Banner.

关键词： Arable land reserve resources Evaluation Hangjin B

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Remote Sensing Survey of Grassland Resources and Study of Grass-livestock Balance in Hangjin Banner of inner mongolia

引用

Asian Agricultural Research 2015年第8期7卷 64-68页

作者： Terigele Yanhong XU Ying LI Quan WU land Survey and planning institute of inner mongolia Autonomous Region

The data of this paper mainly include statistics,field survey data and MODIS remote sensing image data. This paper estimates the aboveground biomass of grassland and theoretical livestock carrying capacity of natural grassland in Hangjin Banner and draws a grass- livestock balance table in accordance with the actual and theoretical livestock carrying capacity of natural grassland. Studies have shown that the grass and livestock balance is good in Hangjin Banner,and the overloading rate is 1. 5%; there was no overloading in 2010 and 2011.

关键词： Remote sensing monitoring Grass-livestock balance

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Comparison of leaf area index inversion for grassland vegetation through remotely sensed spectra by unmanned aerial vehicle and field-based spectroradiometer

引用

Journal of Plant Ecology 2019年第3期12卷 395-408页

作者： Zongyao Sha Yuwei Wang Yongfei Bai Yujin Zhao Hua Jin Ya Na Xiaoliang Meng Department of Spatial Information&Digital Engineering School of Remote Sensing and Information EngineeringWuhan UniversityWuhanHubei 430079China Research Center of Spatial Information and Digital Engineering of the State Bureau of surveying and Mapping WuhanHubei 430079China institute of Botany the Chinese Academy of SciencesBeijing 100093China inner mongolia institute of Grassland surveying and planning Hohhot 010051China Key Laboratory of Forage Cultivation College of GrasslandResources and EnvironmentInner Mongolia Agricultural UniversityHohhot 010018China

Aims Remote sensing technology has been proved useful in mapping grass-land vegetation *** features of vegetation cover can be recorded by optical sensors on board of different *** increas-ing popularity of applying unmanned aerial vehicle(UAV)to mapping plant cover,the study aims to investigate the possible applications and potential issues related to mapping leaf area index(LAI)through integra-tion of remote sensing imagery collected by multiple *** This paper applied the collected spectral data through field-based(FLD)and UAV-borne spectroradiometer to map LAI in a Sino-German experiment pasture located in the Xilingol grassland,inner mongolia,*** on FLD and UAV platforms were taken to measure spectral reflectance related to the targeted vegetation *** on eight vegetation indices(VIs)computed from the col-lected hyperspectral data,regression models were used to inverse *** spectral responses between FLD and UAV platforms were com-pared,and the regression models relating LAI with VIs from FLD and UAV were *** modeled LAIs by UAV and FLD platforms were analyzed in order to evaluate the feasibility of potential integra-tion of spectra data for mapping vegetation from the two *** Findings Results indicated that the spectral reflectance between FLD and UAV showed critical gaps in the green and near-infrared regions of the spec-trum over densely vegetated areas,while the gaps were small over sparsely vegetated *** VI values from FLD spectra were greater than their UAV-based *** of all the VIs,broadband gen-eralized soil-adjusted vegetation index(GESAVI)and narrow-band nNDVI2 were found to achieve the best results in terms of the accuracy of the inversed LAIs for both FLD and UAV *** conclude that GESAVI and nNDVI2 are the two promising VIs for both platforms and thus preferred for LAI inversion to carry spectra integration of the two pla

关键词： grassland leaf area index unmanned aerial vehicle vegetation index remote sensing

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Managed grassland alters soil N dynamics and N2O emissions in temperate steppe

引用

Journal of Environmental Sciences 2018年第4期30卷 20-30页

作者： Lijun Xu Xingliang Xu Xuejuan Tang Xiaoping Xin Liming Ye Guixia Yang Huajun Tang Shijie Lv Dawei Xu Zhao Zhang Hulunber Grassland Ecosystem Observation and Research Station Institute of Agricultural Resources and Regional Planning of ChineseAcademy of Agricultural Sciences Beijing 100081 China institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100081 China Department of Geology (WE13) Ghent University 9000 Gent Belgium Science College of inner mongolia Agricultural University Hohhot Inner Mongolia 010018 China

Reclamation of degraded grasslands as managed grasslands has been increasingly accelerated in recent years in China. land use change affects soil nitrogen（N） dynamics and nitrous oxide（N2O） emissions. However, it remains unclear how large-scale grassland reclamation will impact the grassland ecosystem as a whole. Here, we investigated the effects of the conversion from native to managed grasslands on soil N dynamics and N2O emissions by field experiments in Hulunber in northern China. Soil（0-10 cm）, nitrate（NO3-）,ammonium（NH4＋）, and microbial N were measured in plots in a temperate steppe（Leymus chinensis grassland） and two managed grasslands（Medicago sativa and Bromus inermis grasslands） in 2011 and 2012. The results showed conversion of L. chinensis grassland to *** or B. inermis grasslands decreased concentrations of NO3--N, but did not change NH4-N . Soil microbial N was slightly decreased by the conversion of L. chinensis grassland to ***, but increased by the conversion to B. inermis. The conversion of L. chinensis grassland to M. sativa（i.e., a legume grass） increased N2O emissions by 26.2%, while the conversion to the B. inermis（i.e., a non-legume grass） reduced N2O emissions by 33.1%. The conversion from native to managed grasslands caused large created variations in soil NO3-＋-N and NH4-N concentrations. Net N mineralization rates did not change significantly in growing season or vegetation type, but to net nitrification rate. These results provide evidence on how reclamation may impact the grassland ecosystem in terms of N dynamics and N2O emissions.

关键词： Temperate steppe Managed grassland land use Nitrogen mobility N2O emissions

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Analysis of land use change and its driving force in the Longitudinal Range-Gorge Region

引用

Chinese Science Bulletin 2007年第A02期52卷 10-20页

作者： LI ZhengHai SONG GuoBao LU HaiYan BAO YaJing GAO JiXi WANG HaiMei XU Tian CHENG Yan institute of Bio-Resources and Environment College of Life Science Dalian Nationalities University Dalian 116600 China College of Resources Science & Technology Beijing Normal University Beijing 100875 China institute of Agricultural Resources and Regional planning Chinese Academy of Agricultural Sciences Beijing 100081 China Innovation Base of Regional Ecology Chinese Research Academy of Environmental Sciences Beijing 100012 China inner mongolia Municipality Observatory Huhhot 010051 China e College of Life Sciences Inner Mongolia University Huhhot 010021 China College of Life Sciences Inner Mongolia University Huhhot 010021 China College of Ecological Environment Inner Mongolia Agricultural University H uhhot 010018 China

关于陆地使用度，陆地使用变化率以及各种各样的陆地使用的地区性的差别的研究录入西南纵的范围峡区域(LRGR ) 被执行了在上地区性并且县规模。从社会经济的看法，我们也在研究区域分析了陆地使用变化的开车机制和各种各样的驱动力的相... 详细信息

关于陆地使用度，陆地使用变化率以及各种各样的陆地使用的地区性的差别的研究录入西南纵的范围峡区域(LRGR ) 被执行了在上地区性并且县规模。从社会经济的看法，我们也在研究区域分析了陆地使用变化的开车机制和各种各样的驱动力的相应空间范围。研究结果显示在地区性的规模上，农田，森林和草地在 LRGR，和草地严厉地衰退的陆地使用表演的结构的变化填写陆地使用的主要身体，农田增加和森林保持稳定。在县规模上，陆地使用被那陆地使用水平描绘是相对低的，并且陆地使用度，全面变化率和相对变化在不同陆地使用类型之中评价仍然存在。由分析，在 LRGR 的陆地使用变化被投资主要驾驶人力和物理资源，社会经济产量水平，自然灾难骚乱的紧张和工人的教育水平的紧张。然而， regionalism 在不同驱动力类型的影响范围存在。

关键词：分析方法动力系统纵向岭谷区土地

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Study on the spatial differences and its time lag effect on climatic factors of the vegetation in the Longitudinal Range-Gorge Region

引用

Chinese Science Bulletin 2007年第A02期52卷 42-49页

作者： BAO YaJing SONG GuoBao LI ZhengHai GAO JiXi LU HaiYan WANG HaiMei CHENG Yan XU Tian institute of Bio-Resources and Environment College of Life Science Dalian Nationalities University Dalian 116600 China College of Resources Science and Technology Beijing Normal University Beijing 100875 China Innovation Base of Regional Ecology Chinese Research Academy of Environmental Sciences Beijing 100012 China institute of Agricultural Resources and Regional planning Chinese Academy of Agricultural Sciences Beijing 100081 China inner mongolia Municipality Observatory Huhhot 010051 China College of Ecological Environment Inner Mongolia Agricultural University Huhhot 010018 China College of Life Science Inner Mongolia University Huhhot 010021 China

这篇文章包括温度和降水分析 NDVI 和二个气象学的数据的关联，并且探查回答植被的敏感到温度和降水变化的空间模式。由构造 NDVIr 索引，在在纵的范围峡区域(LRGR ) 的植被盖子和陆地使用之间的关系被揭示。结论如下：(1 ) 时间落后那... 详细信息

这篇文章包括温度和降水分析 NDVI 和二个气象学的数据的关联，并且探查回答植被的敏感到温度和降水变化的空间模式。由构造 NDVIr 索引，在在纵的范围峡区域(LRGR ) 的植被盖子和陆地使用之间的关系被揭示。结论如下：(1 ) 时间落后那植被回答到温度和降水变化的效果被证明。不同区域有相应于最大的关联系数的不同延期时间。根据降水和温度联合的反应时间，也就是，三种温度降水形式被定义在一样的时间的降水和温度，在温度以前的降水和在降水以前的温度。(2 ) 敏感的空间分发，哪个对温度的植被回答，被几个高、低的散布关联中心描绘。与温度，二个感觉迟钝的区域和二条敏感的带不同被形成介绍植被的反应给降水。(3 ) NDVIr 被构造，它能完美地在 LRGR 反映在气象学的因素和陆地使用状况之间的相应关系。

关键词：纵向岭谷区空间差异性气候植被

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：