1.Key Lab of Huazhong Crop Production,Physiology and Ecology of Ministry of Agriculture China/Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement;2.Xiangyang Academy of Agricultural Sciences,Xiangyang
In order to promote "indica to japonica" in Hubei Province, Five japonica rice varieties were used as materials, and four sowing dates were set under the condition of machine transplantation to study the yield, growth period, quality, utilization of temperature and light resources of Japonica Rice varieties for clarify the ecological adaptability of different types of Japonica Rice Varieties in different japonica wheat production areas in Hubei Province. The results showed that as the sowing date was postponed, the growth period of the tested varieties was shortened and the growth process was accelerated. Except for Yongyou 4949 in Jiangling, the yield decreased to different degrees, and the utilization rate of effective accumulated temperature and sunshine hours utilization rate showed a downward trend during the whole growth period. According to the conditions of temperature and light resources and the time of wheat stubble removal in the three ecological regions, the suitable japonica rice varieties and sowing dates are preliminarily determined. The suitable japonica rice varieties are early maturing medium japonica rice and medium maturing medium japonica rice with short growth period in Xiangyang. The varieties suitable are early maturing medium japonica and medium maturing medium japonica in Xiaochang. The varieties suitable are early maturing medium japonica, medium maturing medium japonica and early maturing late japonica, which can all exert the best yield potential in Jiangling.