| 基于作物生育期灾害敏感指数的旱灾粮食减产量研究 |
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| 引用本文： | 江丽,薛翠翠,安萍莉. 基于作物生育期灾害敏感指数的旱灾粮食减产量研究[J]. 水土保持研究, 2011, 18(1): 183-187,191,275 |
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| 作者姓名： | 江丽 薛翠翠 安萍莉 |
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| 作者单位： | 中国农业大学资源与环境学院土地资源管理系,北京,100193 |
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| 基金项目： | 国家科技支撑项目“综合生态与食物安全风险防范关键技术示范(2006BAD20B07)” |
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| 摘 要： | 我国是自然灾害频繁发生的国家,自然灾害造成不同程度的粮食减产,是粮食安全的潜在风险源。该文以旱灾为主,将全国各地区作物生育期、不同旱灾强度、发生时间及发生次数进行耦合分析,研究其耦合规律及主要粮食作物在各生育期对灾害的敏感性,并据此计算我国不同地区旱灾减产量并进行风险评价分析。研究表明,冬小麦的返青、乳熟和成熟期,春小麦的分蘖、乳熟和成熟期,玉米的三叶、七叶和成熟期以及水稻的返青、孕穗、乳熟和成熟期均是防灾减灾的关键期,应该加强农田管理,减少灾害损失。旱灾对我国粮食主产区影响较大,粮食减产风险防范关键区主要分布在黄淮海区、长江中下游区。
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| 关 键 词： | 旱灾 作物生育期 灾害敏感指数 粮食减产 |
Research on the Amount of Grain Loss by Droughts Based on the Sensitive Index of Crop Growth Period |
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| JIANG Li,XUE Cui-cui,AN Ping-li. Research on the Amount of Grain Loss by Droughts Based on the Sensitive Index of Crop Growth Period[J]. Research of Soil and Water Conservation, 2011, 18(1): 183-187,191,275 |
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| Authors: | JIANG Li XUE Cui-cui AN Ping-li |
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| Affiliation: | JIANG Li,XUE Cui-cui,AN Ping-li(Department of Land Resources Management,College of Resources and Environmental Sciences,China Agricultural University,Beijing 100193,China) |
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| Abstract: | China is a county with frequent natural disasters.Natural disasters have grain yield reduction at different levels,and are the potential sources of food security.Based on studies of drought,this paper couples crop growth periods with different intensities,the times and frequencies of drought,further studies on the coupling laws and the sensitivities of disaster at different growth periods of main grain crops,calculates the amount of grain yield reduction caused by drought,analyzes and evaluates drought risk... |
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| Keywords: | drought crop growth period sensitive index of disaster grain yield reduction |
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