Climate Change and Agriculture： Impact and Adaptation

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Impact of Climate Change on Rice Water Demand and Food Security： Case of Thailand and Vietnam

Water plays an important role in food production especially rice. Rice productivity depends greatly on sufficient water to meet evaporative demand and soil moisture. It is certain thalL rice, the most important crop of Thailand and Vietnam, is vulnerable to climate change. This paper proposes an analysis on the impact of climate on rice water requirement and food security in Thailand and Vietnam. Water demand, yield and production of rice were computed under the changed surface air temperature for three time slices, namely 2020s, 2050s and 2080s. Food security was analyzed from rice supply （calculated milled-rice product, rice stock, and imports） and demand （domestic uses from population growth, exports to world market, domestic seed and other uses）. The result showed that, under the higher surface air temperature scenario, water requirement office in Thailand and Vietnam could increase by 1.8 times in the end of the 21 st century. Production of rice dropped by declined yield. Thailand and Vietnam which is the world largest rice exporter in last decades will face the rice shortage in 2080s and 2030s respectively.     

Managing Climate Change Risk in China’s Agricultural Sector：The Potential for an Integrated Risk Management Framework

Climate change poses a serious threat to the future food security of China, which is among the most disaster-prone countries in the world. This paper discusses the implications of climate change for China＇s agricultural sector. Its main objectives are to identify the agricultural risks associated with climate change, to introduce a conceptual framework for agricultural climate risk management and to enumerate key adaptation strategies, challenges, and recommendations.     

A Case Study on Environmental Evaluation and Planning for Range and Forest Management by Means of Geographic Information System （GIS）

The aim of this research is to identify the most suitable land for forestry, afforestation and rangeland management in Hamadan province. This research has been accomplished using Makhdoum＇s model. In this research 30 digital data layers are used. The Geographic Information System （GIS） has been used as main tool and overlay method has been used to implement the mentioned model. The results of this research revealed that the extent of favorite areas for fifth grade forestry, favorite areas for fourth grade afforestation, and favorite areas for third grade and fourth grade range management in the studied area. Based on the results of this research, the studied area has limited potentials for forestry and afforestation activities. The obtained results of evaluation also showed that the rangelands of Hamadan province are extremely poor. Since the rangelands have a substantial role in preservation of soil and water, therefore it is necessary to take appropriate measures for better exploitation of rangelands.     

中国西南边疆山区耕地资源质量评价——以云南省为例

中国西南边疆山区固有的土地生态环境很脆弱,可耕地数量有限,且耕地质量较差。以云南省为例,选取10个指标,应用“极限条件法”与“综合分析法,进行了西南边疆山区省份的耕地适宜性评价,并分析了耕地质量的特点和区域差异性。可为山区生态友好型土地利用体系构建、山区土地利用规划、农业可持续发展规划、粮食安全保障体系建设、新农村建设规划及决策与管理提供基础依据。