Planting Division And A System Design For High Quality Japonica Rice Based On Temperature-Light Resources In The Lower Yangtze River

More and more people have paying more and more attention to the rice quality.In the past three decades,rice planting zone had undergone corresponding changes due to climatic change.The lower Yangtze River,including Anhui,Jiangsu,Zhejiang and Shanghai,are one of the main producing areas for rice planting in China,and is vigorously developing high-quality rice planting.The preferred geographical area,how to better use the current warm and light resources to plant high quality rice has become a new topic of high quality rice production development.This study used the regional test data and meteorological data of rice varieties for nearly two decades,and used correlation analysis,variance analysis and other mathematical statistics techniques to analyze the climate-related factors most relevant to rice quality and the key period of rice.The method explored the relative importance of each indicator to construct a high-quality japonica rice adaptation model for warm and light.According to the conditions of warm-light resources in the lower Yangtze River,combined with the warm-light adaptability model of japonica rice,the adaptive zoning of high-quality japonica rice cultivation in the lower Yangtze River,the main conclusions are as follows:First,photosynthesis affects rice quality,so warm light resources are the main influencing factors in the process of establishing rice quality.The climatic factors that have the greatest impact on the quality of japonica rice are the average temperature and diurnal range.The relative importance of average temperature and diurnal range is 64%and 32%,respectively.The temperature and light response range of high quality rice quality was determined by statistical analysis of data:The average temperature of high japonica rice in the 20 days after the full heading was 22～25℃;the diurnal range was greater than or equal to 7.5℃.So we can build a high quality japonica rice model that adapts to warm and light resources;Second,the warm-light adaptive model combines the average temperature precipitation and sunshine hours of the safe heading period with the planting division.High quality japonica rice can be grown in Anhui,Jiangsu,Zhejiang and Shanghai.From the southeast to the northwest of the lower Yangtze River,the planting suitability of high quality rice is increasing.A few areas in the southeastern coastal areas are basically unsuitable for planting high-quality rice,because the diurnal range is too small.Thirdly,By arranging the warm-light data,the quality data to build the corresponding database and the established evaluation model,and then using the Android software development technology and ArcGIS map service technology to develop the application system.Improve the cultivation techniques of high quality rice by adjusting the key growth period such as sowing date.In the end,the purpose of improving the planting area and quality of high-quality rice is achieved as a guiding theoretical basis that people can refer to in the actual production of high quality japonica rice.