Screening Test on the Varieties of Ratoon Rice Suitable for Mechanized-harvesting in Changting County

In order to screen the varieties of mechanized-harvested ratoon rice with good resistance, strong regenerative capacity and high yield in the regenerated season, and suitable to be planted widely in Changting County, the five representative varieties of rice, including Xinrongyouhuazhan, Longliangyou 1212, Jingliangyouhuazhan, Jingliangyou 1212 and Yongyou 5552, which have been tested and planted in Changting County, were selected in 2019, and Y Liangyou 5866 was used as the control group to carry on the screening test of the varieties of mechanized-harvested ratoon rice by using the method of wide field trial. The results showed that the five varieties of rice were planted in Changting County as the middle-season rice and ratoon rice. Yongyou 5552 showed the strong regenerative capacity in the regenerated season, and the highest yield in the two seasons (up to 14 236.5 kg), indicating that it was suitable to be used as the mechanized-harvested ratoon rice in Changting County, and it could be used as the main variety to further expand the demonstration planting of mechanized-harvested ratoon rice in Changting County. The varieties of Jingliangyouhuazhan and Longliangyou 1212 had a general regenerative capacity in the regenerated season, but the yield in the two seasons was relatively high, so they could be used as the varieties to be promoted appropriately for the middle-season rice and ratoon rice in Changting County. Xinrongyouhuazhan had strong regenerative capacity in the regenerated season after the mechanized-harvesting, but the yield in the first season was low, so the yield of the two seasons was low. Jingliangyou 1212 had weak regenerative capacity in the regenerated season after the mechanized-harvesting and low yield in the regenerated season, so the yield of the two seasons was low. Generally speaking, the two varieties were not suitable to be planted widely in Changting County as the middle-season rice and ratoon rice.