Field evaluation of newly introduced hybrid rice cultivars in Central Vietnam

摘要

Two field experiments were conducted in summer-autumn 2017 and winter-spring 2017-18 seasons in Central Vietnam to evaluate the performance of six newly introduced hybrid rice cultivars to select appropriate cultivars for this region. Growing time, plant height, number of tillers per plant, number of productive tillers per plant, 1000-grain weight and yield were investigated. The results indicated that all tested cultivars belonged to short growth duration, ranging from 104 to 121 days and intermediate height plant ranging from 102.9 to 123.4 cm. The yield of three potential cultivars of LC 270, Q. uu 6 and Arize 6129 was from 7.7 to 8.2 t/ha in the summer-autumn and from 7.9 to 8.1 t/ha in the winter-spring season. Thus, these cultivars were considered to incorporate into the rice variety structure of Central Vietnam.