Abstract:
With the background of climate warming, the occurrence frequency and intensity of agricultural meteorological disasters in China increase significantly, and challenges of responding to agrometeorological disasters become more severe. The key to solving the national major needs lies in clarifying processes of agricultural meteorological disasters and their techniques for disaster reduction and production protection. China is the largest rice producer of the world and its rice production ranks first in domestic growing grain. Among them, the double-cropping rice has a wide range of cultivation, accounting for about 70% of total rice production in China, and is mainly distributed in the mid-lower reaches of the Yangtze and South China.Heat damage, flood, drought and cold injury are major meteorological disasters seriously affecting the growth and development of double-cropping rice in China. On the basis of researches at home and abroad, the recent progresses on major meteorological disasters (cold damage, high temperature disaster, flood, and drought) in double-cropping rice are reviewed. Occurrence characteristics, temporal and spatial distribution patterns of major meteorological disasters (cold damage, high temperature disaster, flood, and drought) and their impacts on production are revealed. Influencing mechanisms of major meteorological disasters on double-cropping rice growth and yield are analyzed. Advantages and disadvantages of long-term, medium and short-term monitoring and early warning methods (site monitoring, remote sensing monitoring, indicator warning, mathematical statistical analysis and dynamic mechanism model) against major meteorological disasters of double-cropping rice are checked, and techniques of reducing meteorological disasters are summarized. In view of the current spatial and temporal distribution of climatic resources and deficiencies of the research on meteorological disasters of double-cropping rice, scientific issues calling for more attention in the future research are proposed, namely, meteorological disaster process and its dynamic monitoring index system, the occurrence pattern of meteorological disasters and remote sensing monitoring technology under climate warming, the response of meteorological disasters to climate change and dynamic assessment technology of meteorological disaster damage, satellite-ground coupled numerical model development for meteorological disaster processes of double-cropping rice, adaptability of double-cropping rice planting systems to climate change, as well as new techniques and demonstrations for meteorological disaster reduction. These researches would provide further basis and technical support for the effective mitigation of meteorological disasters, and ensure stable production and guarantee high yields of double-cropping rice.