检索结果-南通市图书馆

agricultural land Use Optimal Allocation System in Developing Area:Application to Yili Watershed, Xinjiang Region

Chinese Geographical Science 2012年第2期22卷 232-244页

作者： ZHANG Ying ZHANG Hongqi NI Dongying SONG Wei Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beij＇ing 100101 China Graduate University of Chinese Academy of Sciences Beo＇ing 100049 China Beijing Forestry University Beijing 100083 China

In developing countries, land productivity involves little market, where the agricultural land use is mainly determined by the food demands as well as the land suitability. The land use pattern will not ensure everywhere enough land for certain cropping if spatial allocation just according to land use suitability. To solve this problem, a subzone and a pre-allocation for each land use are added in spatial allocation module, and land use suitability and area optimi- zation module are incorporated to constitute a whole agricultural land use optimal allocation （ALUOA） system. The system is developed on the platform .Net 2005 using ArcGIS Engine （version 9.2） and C# language, and is tested and validated in Yili watershed of Xinjiang Region on the newly reclaimed area. In the case study, with the help of soil data obtained from 69 points sampled in the fieldwork in 2008, main river data supplied by the Department of Water Resources of Xinjiang Uygur Autonomous Region in China, and temperature data provided by Data Center for Resources and Environmental Sciences, Chinese Academy of Sciences, land use suitability on eight common crops are evaluated one by one using linear weighted summation method in the land use suitability model. The linear pro- gramming （LP） model in area optimization model succeeds to give out land area target of each crop under three scenarios. At last, the land use targets are allotted in space both with a six subzone file and without a subzone file. The resuits show that the land use maps with a subzone not only ensure every part has enough land for every crop, but also gives a more fragmental land use pattern, with about 87.99% and 135.92% more patches than the one without, while at the expense of loss between 15.30% and 19.53% in the overall suitability at the same time.

关键词： developing country agricultural land subzone optimal allocation Yili watershed

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

A systematic review of soil erosion control practices on the agricultural land in Asia

引用

International Soil and Water Conservation Research 2020年第2期8卷 103-115页

作者： Nur Syabeera Begum Nasir Ahmad Firuza Begham Mustafa Safiah@Yusmah Muhammad Yusoff Gideon Didams Department of Geography Faculty of Arts and Social Sciences University of Malaya Kuala Lumpur Malaysia

Soil is the basis of production in agriculture activities. The combination of intensive farming activities, improper farming practices, rainfall regimes, and topography conditions that taken place in agricultural land lead to the soil erosion problem. Soil erosion is the major constraint to agriculture that affects the yield production and degraded environmental sustainability. Furthermore, soil erosion that occurs in the agricultural area has jeopardized the sustainability of agriculture activities. Asia is one of the major agricultural producers in the world. It is essential to know how to mitigate soil erosion in Asian agri-cultural land. This systematic review aims to analyze the existing literature on research that has been done on control practices that had been taken in Asia agricultural land towards soil erosion. This article is guided by the PRISMA Statement (Preferred Reporting Items for Systematic reviews and Meta-Analysis) review method. The authors systematically reviewed the literature to study the control practices that been taken and tested to control soil erosion on the agricultural land in Asia. Accordingly, this systematic review identified 39 related studies about the topic based on the Web of Science and Scopus databases. This article divided the control practices into three main themes, which are agronomic practices, agro-stological practices, and mechanical practices. The three main themes then produced a total of 11 sub-themes. Further specific and sustained research is needed to tackle this severe environmental problem through a better method, such as this systematic review method. The systematic review helps farmers and policymakers to implement the most practical approach to control and reduce soil erosion.

关键词： Systematic literature review Soil erosion Control practices agricultural land Asia

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

Assessment of China's economic loss resulting from the degradation of agricultural land in the end of 20th century

引用

Journal of Environmental Sciences 2004年第2期16卷 199-203页

作者： HAOFang-hua CHANGYing NINGDa-tong InstituteofEnvironmentalSciences StateKeyJointLaboratoryofEnvironmentalSimulationandPollutionControlBeijingNormalUniversityBeijing100875China.

land degradation is a consequence stemming from both natural processes and social economic activities. On the bases of analyzing general situation of agricultural land degradation in China, the monetary estimating methods such as market value method and shadow engineering method were used to quantitatively assess the economic loss resulting from land deterioration. Results showed that the economic loss in 1999 was 326 81 billion RMB Yuan, which accounted for 4 1% of GDP in the same year of China. If taking five items namely farmland conversion, soil erosion, salinization, decline in reservoir functions, and siltation in waterways and, comparing with that in 1992, the percentage of economic loss to GDP has increased by 1 5 in the only 7 years.

关键词： agricultural land degradation economic loss estimating method China

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

China's agricultural land use change and its underlying drivers:A literature review

引用

Journal of Geographical Sciences 2021年第8期31卷 1222-1242页

作者： WANG Xue LI Xiubin Key Laboratory of land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

Understanding the manifestations and underlying drivers of agricultural land use change in China is of great importance for both domestic and global food security. However, little is known about the holistic pattern of agricultural land use change across China, especially from the perspective of intensity since the evidence has been gathered mainly through case studies at local levels. This study conducts a systemic review of agricultural land use change and its underlying drivers in China by aggregating 169 relevant case studies from 123 publications. The cases related to intensification and disintensification, which are the two types of agricultural land use change, are generally equal, accounting for 50% of the total number of cases. Intensification and disintensification can be further divided into the same three categories: expansion/contraction of agricultural land, changes in agricultural land use activities and changes in land management intensity. Demographic, economic, technological, and institutional drivers, together with location factors, are frequently noted as significant underlying drivers, while sociocultural drivers and farm(er) characteristics are less frequently recognized. Finally, three major land use change trajectories are summarized mainly concerning rising labor costs and the concomitant increase in off-farm employment, the ecological improvement policy, and advances in agricultural technology.

关键词： agricultural land land use intensity driving forces aggregate analysis China

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

Conversion Margins for the Major Uses of agricultural land and Their Variations in Shandong Province, China

引用

Chinese Journal of Population,Resources and Environment 2011年第1期9卷 55-62页

作者： Wang Xingjie Gu Shuzhong Zhang Xinhua Wu Hong Zhou Hong Wen Wujun 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 Institute of Resources and Environmental Polices Development Research Center of the State Council Beijing 100010 China Research Center for Sustainable Development of Shandong Province Jinan Shandong 250014 China

It is of practical significance for the decision-making on country food security and farmland protection to analyze the conversion margins for the major uses of agricultural land and their variations. Based on the panel data of wheat, corn, vegetable, fruit, and forests productions from 520 investigated farmer households of 13 investigated villages in Shandong Province from 2003 to 2009, and using Cobb-Douglas production function, the revenue conversion margins can be obtained separately, between different grain-crops （wheat, corn） and different non-grain crops （vegetable, fruit, forests）, and the conversion relationship between growing grain（ wheat, corn） and going out for non-farm work. The results show that from 2003 to 2009, growing wheat and corn are more economically and reasonably for farmers, compared with growing vegetable, but growing wheat and corn are becoming less economically and less reasonably day by day, compared with planting forests. Moreover, the conversion margin between wheat and fruit shows obvious scissors difference. Just from 2007, farm- ers＇ growing fruit became economically and reasonably, but until 2009, compared with going out to work after abandoning farm- land, growing wheat had no economic rationality. From 2003 to 2009, farmers＇ growing corn is more profitable than growing fruit and going out for non-farm work after abandoning farmland. The subsidies for wheat and corn have increased farmers＇ comparative income from food production remarkably, but the subsidies cannot change the general tendency that farmers transform food （wheat, corn） production into non-food （especially forests） production. The revenue difference between growing wheat, corn and vegetable and growing fruit and forests is being pulled ceaselessly bigger, and the tendency that farmers transform wheat, corn and vegetable growing lands into fruit and forests growing lands has become increasingly apparent.

关键词： agricultural land farmer conversion margin C-D production function subsidies Shandong Province

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

Spatiotemporal changes in agricultural land cover in Nepal over the last 100 years

引用

Journal of Geographical Sciences 2018年第10期28卷 1519-1537页

作者： Basanta PAUDEL 张镱锂李士成刘林山 Key Laboratory of land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources Research CAS University of Chinese Academy of Sciences (UCAS) CAS Center for Excellence in Tibetan Plateau Earth Sciences School of Public Administration China University of Geosciences

In order to advance land use and land cover change（LUCC） research in Nepal, it is essential to reconstruct both the spatiotemporal distribution of agricultural land cover as well as scenarios that can explain these changes at the national and regional levels. Because of rapid population growth, the status of agricultural land in Nepal has changed markedly over the last 100 years. Historical data is used in this study, encompassing soils, populations, climatic variables, and topography. Data were revised to a series of 30 m grid cells utilized for agricultural land suitability and allocation models and were analyzed using a suite of advanced geographical tools. Our reconstructions for the spatiotemporal distribution of agricultural land in Nepal reveal an increasing trend between 1910 and 2010（from 151.2 × 10^2 km^2 to 438.8 × 10^2 km^2）. This expanded rate of increase in agricultural land has varied between different eco, physiographic, and altitudinal regions of the country, significantly driven by population changes and policies over the period of this investigation. The historical dataset presented in this paper fills an existing gap in studies of agricultural land change and can be applied to other carbon cycle and climate modeling studies, as well as to impact assessments of agricultural land change in Nepal.

关键词： agricultural land reconstruction land suitability for cultivation altitudinal variation Nepal

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

Impact of Urbanization on agricultural land in Makurdi Local Government Area of Benue State,Nigeria

引用

NASS Journal of agricultural Sciences 2021年第1期3卷 21-28页

作者： Terwase Shabu Sussan Fate Mfanyo Keziah Ukula Department of Geography Benue State UniversityMakurdiNigeria

This study assessed the impact of urbanization on agricultural land in Makurdi local government area of Benue *** data collected were population figures and land use for three Epoch(1997,2007 and 2017).The satellite images were sourced from the National Center for Remote Sensing and Geographic Information System,*** the analysis,cross change detection analysis and overlay analysis using ArcGIS 9.0 was performed to detect where land-use change has occurred and which type of land use agricultural land has transformed *** GIS analysis revealed that there is an increase in settlement and a decrease in agricultural land from 1997–*** also revealed that 99.51ha of agricultural land use has been converted to settlement between 1997 and *** results reveal that urbanization has significant effects on agricultural land in the study area and these effects include;decreasing agricultural land,decreasing agricultural activities and decrease in farm *** the growth in the population of Makurdi LGA continues unchecked,agricultural land will be significantly depleted in the *** study recommended that there should be effective law and policy to control population growth sustainably to minimize the negative impact of urbanization in the study ***,urban agriculture should be encouraged to sustain the food supply in urban areas.

关键词： Urbanization agricultural land Population growth Food supply Makurdi Benue State

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

A Study on agricultural land Consolidation Potential in Changfeng County

引用

Asian agricultural Research 2017年第4期9卷 66-68,71页

作者： Gang SHU Zhongxiang YU College of Economics and Management Anhui Agricultural University Institute of land and Resources Anhui Agricultural University

In this paper,we study the agricultural land consolidation quantity potential( including theoretical quantity potential and actual quantity potential) and quality potential in Changfeng County,use the new arable land area to denote the quantity potential,and use the food production improved after agricultural land consolidation to represent quality potential. On this basis,we measure and evaluate the agricultural land consolidation potential in Changfeng County.

关键词： agricultural land Consolidation potential Changfeng County

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

Theoretical Study on the Regional Comprehensive Price of Expropriated agricultural land Based on the Benchmark land Price

引用

Asian agricultural Research 2021年第9期13卷 20-23页

作者： Yan TIAN Peng FAN Qingwei YANG Xihui YANG Lei WANG Institute of Geographical Sciences Henan Academy of SciencesZhengzhou 450052China Henan Kefa Geographic Research Institute Co. Ltd.Zhengzhou 450052China

So far,the work of calculating the regional comprehensive price of expropriated agricultural land has been carried out for more than ten years,but in the specific calculation process,the concept and calculation method of the regional comprehensive price of expropriated land are still lack of unified *** this paper,from the point of view of the benchmark land price,the regional comprehensive price of expropriated agricultural land is calculated by using the relatively mature benchmark land price.

关键词： agricultural land Regional comprehensive price of expropriated land Calculation method Benchmark land price

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

Sustainable Utilization of agricultural land in Chengdu Metropolitan Area Based on Emergy Analysis

引用

Asian agricultural Research 2020年第12期12卷 23-28,31页

作者： Kai LAN Qinghong RAN School of History & Geography and Tourism Chengdu Normal University Chengdu 611130 China China West Normal University Nanchong 637000 China

[Objectives]This study aimed to analyze the sustainable use of agricultural land in the Chengdu metropolitan area from 2006 to 2016.[Methods]Using Odum's emergy theory,an index system was constructed to evaluate the sustainable use of agricultural land,including total emergy input-output ratio,industrial emergy input-output ratio,environmental load index and sustainable use index of agricultural land based on emergy,to reflect the sustainable use of agricultural land in the Chengdu metropolitan *** data base was a unified standard that was converted from various types of energy stored and flowing in the agricultural land system of the Chengdu metropolitan area,that is,emergy.[Results]From 2006 to 2016,the total emergy input-output ratio of agricultural land in the metropolitan area fluctuated and decreased,lower than the national *** industrial emergy input-output ratio was generally in a fluctuating downward *** environmental load index of agricultural land in the metropolitan area was lower than the national ***,it has been on the rise since *** the corresponding period,the sustainable use index of the region also showed a downward trend.[Conclusions]The utilization rate of emergy in this area was *** dependence of industrial emergy input-output ratio on industrial subsidiary energy and the degree of agricultural mechanization are constantly *** environmental resources in this area still have room for accommodation and have not been fully *** sustainable use of agricultural land has been declining.

关键词： agricultural land Emergy analysis Sustainable use Chengdu metropolitan area

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：