Comparative Study on Different Ratoon Rice Varieties in Southern Hunan
To screen high-yield and high-quality ratoon rice cultivars suitable for promotion in southern Hunan,Yongzhou Institute of Agricultural Sciences compared the production performance of'Taiyou 390','Y Liangyou 9918','Quanyou Yuenongsimiao','Shenliangyou 475',and'Jingliangyouhuazhan'in 2023.The results showed that first-season rice of all the five cultivars was harvested before August 20,and the ratoon rice was in full heading before September 20.The yields of the first-season rice,ratoon rice,and two seasons of'Shenliangyou 475'were the highest,reaching 9 442.5,4 878.6,and 14 321.1 kg/hm2,respectively.The regeneration capacities of'Jingliangyouhuazhan'and'Shenliangyou 475'were high,reaching 1.34 and 1.23,respectively.There was no significant difference in ratoon rice transparency among the five cultivars.The brown rice rates of'Taiyou 390','Shenliangyou 475',and'Quanyou Yuenongsimiao'were 79.5%,79.4%,and 78.8%,respectively.The head rice rates of'Taiyou 390','Shenliangyou 475'and'Quanyou Yuenongsimiao'were 62.3%,59.7%and 62.1%,respectively.The ratio of length to width and rice transparency had no significant difference among the five rice cultivars.All the five rice cultivars,especially'Shenliangyou 475',were suitable for ratoon rice cultivation in southern Hunan.
万方数据
维普
