Crops ›› 2020, Vol. 36 ›› Issue (2): 172-175.doi: 10.16035/j.issn.1001-7283.2020.02.026

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Effects of Different Sunshine Durations on Main Agronomic Traits of Roselle

Zhao Yanhong,Hou Wenhuan,Liao Xiaofang,Tang Xingfu,Li Chuying()   

  1. Cash Crops Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, Guangxi, China
  • Received:2019-08-16 Revised:2019-11-25 Online:2020-04-15 Published:2020-04-13
  • Contact: Chuying Li E-mail:lcy6689@126.com

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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

Fig.1

The abnormal buds (a) and the normal buds (b)"

Table 1

Effects of different sunshine duration on the phenotypic traits of roselle"

日照时长
Sunshine duration (h)		 MG1501-1 MG1502-2
8.0 叶片淡绿,植株细小,植株徒长,茎细长,变态花蕾多且着色不均匀,花蕾呈现红绿条纹相间且基部为橘红色,长势弱 叶片淡绿,植株徒长,茎细长,变态花蕾多且着色不均匀,花蕾基部为橘红色,长势弱
9.5 叶片绿色,植株中等,变态花蕾和正常花蕾数量中等,长势中等 叶片绿色,植株中等,变态花蕾和正常花蕾数量中等,长势中等
11.0 叶片浓绿,植株粗壮,正常花蕾多且着色均匀,长势好 叶片浓绿,植株粗壮,正常花蕾多且着色均匀,长势好
CK（自然光） 叶片浓绿,植株粗壮,无花蕾 叶片浓绿,植株粗壮,极少花蕾

Table 2

Effects of different sunshine durations on the florescence of roselle 月-日 Month-day"

日照时长
Sunshine duration (h)		 MG1501-1 MG1502-2
现蕾期
Squaring		 始花期
First-flowering		 成花逆转出现期
Flowering reversal		 现蕾期
Squaring		 始花期
First-flowering		 成花逆转出现期
Flowering reversal
8.0 5-04 5-26 6-05 5-02 5-24 6-02
9.5 5-02 5-22 5-31 5-01 5-21 5-30
11.0 4-30 5-21 5-30 4-28 5-20 5-29
CK（自然光） - - - 5-04 5-28 -

Table 3

Effects of different sunshine durations on the main agronomic traits of roselle"

品系
Line		 日照时长
Sunshine
duration (h)		 株高
Plant
height (cm)		 分枝数
Branches
number		 单株果数
Fruit number
per plant		 鲜果重
Fruit fresh
weight (g)		 萼片鲜重
Sepals fresh
weight (g)		 萼片干重
Sepals dry
weight (g)
MG1501-1 8.0 113.37a 11.70b 6.13b 24.20b 12.93b 1.20b
9.5 111.14a 10.97b 6.29b 27.39b 14.85b 1.45b
11.0 106.90a 17.73a 21.10a 83.20a 49.73a 4.70a
CK（自然光） 120.00a 20.00a 0.00b 0.00b 0.00b 0.00b
MG1502-2 8.0 121.97a 11.67b 24.37b 136.83c 71.21b 8.76b
9.5 119.57a 14.50ab 30.81ab 211.94b 113.14b 13.45b
11.0 110.47a 13.57ab 39.51a 301.10a 160.06a 19.70a
CK（自然光） 126.50a 17.00a 4.00c 30.67d 16.42c 2.09c
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