Study on Regionalization of Suitable Cultivation Period of High Quality Rice in Hubei ProvinceRegionalization of Suitable Cultivation Period of High Quality Rice in Hubei Province
The filling stage of high-quality rice in Hubei Province is often completed under high temperature,which significantly reduces the quality and yield.Carrying out climate suitability zoning for high-quality rice and planning the reasonable grouting period of high-quality rice in different areas is a basic work for the development of high-quality rice.In this study,the daily meteorological data of 75 national meteorological observation stations in Hubei Province from 1991 to 2020 were used.The 5d sliding average method was adopted to determine the three types of suitable boundary dates of high temperature,gentle temperature,and suitable temperature for the filling stage of rice in different regions.Using the length of gentle temperature and suitable temperature cultivation period as the main index,the fuzzy clustering statistical method was used to complete the type of suitable cultivation period for high-quality rice in different regions in Hubei Province,and the impacts of different regions on high-quality rice were analyzed.The results showed that the seasonal distribution and duration of suitable cultivation period in different regions were different.The time suitable for quality rice irrigation in the whole region of Hubei Province was generally shorter,which was a major defect in the development of quality rice.The suitable cultivation period of high-quality rice in Hubei Province could be divided into four regions,which included the short season high-quality rice area in the mountainous areas of western Hubei,the high temperature and high light high-quality rice area in northwestern Hubei,the high temperature and short autumn high-quality rice area in central and eastern Hubei,and the high temperature and long autumn high-quality rice area in southeastern Hubei.The zoning map geographically presented a fish scale-like sub-distribution from southeast to northwest.Among them,the first two regions weresuitable and more suitable for high-quality rice.The differences in climate between different regions in the development of high-quality rice mainly attributed to the suitability for cultivation period.In conclusion,the quality of rice industry in Hubei Province should take heat resistance and heat avoidance and regional rational layout as the focus of the technological development.
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