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Accueil du site → Doctorat → Chine → 2020 → Effects of Drought on Grain Yield of Main Grain Producing Areas in China and Countermeasures for Drought Resistance

Chinese Academy of Agricultural Sciences (2020)

Effects of Drought on Grain Yield of Main Grain Producing Areas in China and Countermeasures for Drought Resistance

杜建斌;

Titre : Effects of Drought on Grain Yield of Main Grain Producing Areas in China and Countermeasures for Drought Resistance

Auteur : 杜建斌;

Grade : Doctoral Dissertation 2020

Université : Chinese Academy of Agricultural Sciences

Résumé partiel
Drought is one of the major disasters in China.The grain production of 13 major grain producing provinces accounts for more than 75% of that the whole country,It is of great significance to improve the drought resistance and disaster reduction capacity of major grain producing provinces by analyzing the change trend of grain production the impact of drought on grain production in 13 major grain producing provinces since the founding of the people’s Republic of China.In this study,we collected the data of crop sown area,drought disaster area and grain yield of 13 major grain producing provinces in China since the founding of the people’s Republic of China,systematically analyzed the change trend of grain production and the impact of drought on Grain Yield in 13 major grain producing provinces in China,and summarizes the drought relief measures in different regions with some provinces as examples.Finally,based on the global climate model,simulated and predicted the frequency of different drought levels and the proportions of different drought levels in China from 2031 to 2060 in China’s country-wide and main grain producing province under RCP4.5 and RCP8.5 scenarios,predict the evolution trend of drought in China’s main grain producing areas under future scenarios.The main conclusions of the paper are as follows :(1)Since the founding of the People’s Republic of China,the drought-affected and drought-suffered areas in Northeast China have gradually increased.The drought-affected rate and drought-suffered rate are higher than those of the other three regions.Among them,Inner Mongolia Province has the highest average drought-affected and drought-suffered rate,followed by Liaolin.The grain planting area of Heilongjiang,Jilin and Inner Mongolia in the northeastern region has gradually increased.The planting area with grain in the Huanghuaihai area has remained basically stable.In the middle and lower reaches of the Yangtze River and the southwestern region,droughts have significantly reduced grain yields and total yields,and drought-affected and drought-suffered rates were negatively correlated with grain yields and total yield

Mots clés : Drought; Food production; Drought-affected area; Drought countermeasures; Drought trend;

Présentation (CNKI)

Page publiée le 16 juin 2021, mise à jour le 21 juin 2021