Abstract:

According to ratoon rice growth and yield formation with meteorological conditions in the southeast of Sichuan basin，light and heat conditions are the main climatic factors which influence the growth period of ratoon.The main meteorologic problems which influence the ratoon most are the continuous low temperature overcast and rainy day during the flowering stage or the high temperature and drought during the germination of dormant buds stage.Based on the analysis beforehand,the article selected accumulated temperature and sunshine duration during the growth of ratoon as the key indices of climatic types,which have significantly different spatial distribution by terrain and have the great influence on the ratoon growth and yield formation.The sunshine and heat resources adaptive regionalization of ratoon rice was made based on the spatial distribution of indices which was made based on the GIS and 1:250,000 DEM.The area suitable for cultivation were divided into four types based on the analysis.They were the region rich in heat and light,the region rich in heat and relatively rich in light,the region rich in light and relatively rich in heat,and the region relatively rich in light and heat.And characters of climate resources and meteorological disasters were also described by types too.Based on the above,the paper put forward the cultivation methods to increase production and the ways to develop ratoon with other late autumn crops in order to develop the ratoon rice more stable and reliable