关键词: 玫瑰茄, 短日照, 农艺性状, 花期

Abstract:

The varieties MG1501-1 and MG1502-2 of roselle were used as test materials. The main agronomic traits of roselle were investigated based on 8.0, 9.5 and 11.0h duration of sunshine and using natural light as control (CK). The results showed that the plants were sturdy with dark-green leaves and good growth under CK. After 11.0h sunshine treatment the plants were study, with dark-green leaves and normal buds which were evenly colored. The majority of the plants grew with slender stems, light green leaves, abnormal buds with red & green stripes which were unevenly colored after 8h sunshine treatment. The growth was followed by CK > 11.0h > 9.5h > 8.0h sunshine duration. The starting time of the budding, first-flowering and flowering reversal were followed by 11.0, 9.5, 8.0h sunshine duration. The plant height was followed by CK > 8.0h > 9.5h > 11.0h sunshine duration and it was not significant among all the treatments. The number of branches, fruits were the maximum, and the yield of fresh fruits, fresh sepals and dry sepals were the maximum with 11.0h sunshine duration, which reached at significant levels compared with other treatments. Based on the comprehensive indexes, the main yield traits of 11.0h sunshine duration were better than those of 8.0, 9.5h and CK treatments. The 11.0h sunshine duration could induce the roselle which were under the long-day environment flowering successfully. The technology of short-day can make roselle in off-season cultivation, then it can improve the multiple planting index and economic benefits.

Key words: Roselle, Short sunshine, Agronomic traits, Florescence