Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Master → Chine → 2021 → Study on Drought Risk Assessment of Main Maize Production Areas in Songliao Plain under the Background of Climate Change

Northeast Normal University (2021)

Study on Drought Risk Assessment of Main Maize Production Areas in Songliao Plain under the Background of Climate Change

阿日古娜

Titre : Study on Drought Risk Assessment of Main Maize Production Areas in Songliao Plain under the Background of Climate Change

Auteur : 阿日古娜

Grade : Master 2021

Université : Northeast Normal University

Résumé partiel
Global climate change,which is mainly characterized by warming,has a significant impact on the occurrence and catastrophe law of agro-meteorological disasters in China,and the losses caused by it continue to increase. Drought disasters induced by climate change frequently occur,posing a serious threat to China’s food security and sustainable agricultural development. Under the background of climate change,the harmfulness and uncertainty of agricultural drought have caused huge potential risks to China’s food security. Corn is the grain crop with the largest sown area in Northeast China. The middle and high latitudes where the main corn producing areas in Songliao Plain are located are the areas with the most sensitive response to climate change,which are facing severe challenges brought by climate change,especially affecting national food security and restricting the sustainable development of our society and economy. In recent decades,the frequency and risk of corn meteorological disasters have increased in this region,among which drought disasters have accounted for 60% of agricultural meteorological disasters,and at the same time,55% of grain production has been reduced. Drought disaster is the main cause of maize yield reduction. Although there are many studies on the impact of climate change on agriculture at home and abroad,most studies on drought risk are based on single drought index,while there are few studies on drought risk assessment based on comprehensive drought index,and there is a lack of studies on the impact of drought disaster on corn yield under different global warming scenarios. Therefore,carrying out drought risk assessment research in the main corn producing areas of Songliao Plain under the background of climate change,and studying the possibility of future drought occurrence and possible corn losses,will make up for the deficiency of the research foundation of drought hazard mechanism,risk early warning and prediction under the background of climate change,and solve the key problems of drought disaster risk management in corn agriculture to cope with the impact of climate change. The research results have broad application prospects and important scientific significance and application value.In this study,the main maize producing areas in Songliao Plain were selected as the main disaster-bearing body of drought disaster,and the impact of drought disaster was measured by the change of maize yield.

Mots clés : Climate change ;Maize;Drought disaster ;Risk assessment ;Global warming 1.5℃ and 2.0℃ ;

Présentation (CNKI)

Page publiée le 6 novembre 2021