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[1]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(01):183-187,191.

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Research on the Amount of Grain Loss by Droughts Based on the Sensitive Index of Crop Growth Period

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 18 Number of periods: 2011 01 Page number: 183-187,191 Column: Public date: 2011-02-20

Title:: Research on the Amount of Grain Loss by Droughts Based on the Sensitive Index of Crop Growth Period

Author(s):: 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

Keywords:: drought; crop growth period; sensitive index of disaster; grain yield reduction

CLC:: S423

DOI:: -

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. The results show that the re-greening, milky stage and maturity stage of winter wheat, tillering stage, milky stage and maturity stage of spring wheat, trefoil stage, seven leaves and maturity stage of maize, the re-greening stage, booting stage, milky stage and maturity stage of rice are the critical periods of drought precaution and drought mitigation. Droughts have greater impact on China’s main grain-producing areas. The key areas of drought precaution are mainly distributed in the North China Plain, the Yangtze District.

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