Chilling and heat requirements of different Prunus mume cultivars

doi:10.3969/j.issn.1004-1524.2023.05.11

Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (5): 1080-1087.DOI: 10.3969/j.issn.1004-1524.2023.05.11

• Horticultural Science • Previous Articles Next Articles

Chilling and heat requirements of different Prunus mume cultivars

ZHANG Yuhan¹(), ZHANG Jitang², MA Kaifeng¹, ZHANG Ruoxi¹, WEI Linxin¹, LI Qingwei¹^,^*()

1. School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China
2. Yanling City Forestry Bureau, Yanling 461200, Henan, China

Received:2022-09-28 Online:2023-05-25 Published:2023-06-01

Abstract

Abstract:

In this study, four typical perennial seedlings of early-flowering Prunus mume cultivars, P. mume cv. Zaoyudie, P. mume cv. Zaohualve, P. mume cv. Nanjinggongfen and P. mume cv. Gulihong, were used as test materials. The experimental methods of natural dormancy of P. mume blossoms and early warming to promote flowering were conducted to study the chilling and heat requirements of the most widely planted P. mume cultivars in Yanling, Henan. Effects of different low temperature accumulations on the flowering characteristics of P. mume blossoms were analyzed to provide a theoretical basis for further exploring the cultivation techniques for regulating the flowering period of P. mume. The results showed that according to the statistics of the chilling requirement of the 4 cultivars according to the Utah model, it was concluded that the chilling requirement of P. mume cv. Zaoyudie was 372 CU, P. mume cv. Zaohualve was 348 CU, and P. mume cv. Nanjinggongfen was 396 CU, and P. mume cv. Gulihong was 408 CU. The 4 cultivars all belonged to the cultivars with low chilling requirement, among which P. mume cv. Zaohualve was the lowest, and the other 3 cultivars had little difference. According to the model of growth length, the heat requirement of flower buds of P. mume cv. Zaoyudie, P. mume cv. Zaohualve, P. mume cv. Nanjinggongfen and P. mume cv. Gulihong were 9 756.28、10 129.51、9 865.46、9 171.14 GDH ℃, respectively; According to the effective accumulated temperature model, the heat requirements for flowering were 397.10, 414.80, 400.65, 375.50 ℃, respectively. There was a negative correlation between the chilling demand value under the Utah model and the heat requirement value under the 2 heat requirement evaluation models. Therefore, the 4 P. mume cultivars were all low chilling requirement cultivars, and the accumulation of chilling capacity played a role in promoting the flowering quality; the ranking and estimation of the heat requirement by the 2 heat requirement models were consistent; there was a negative correlation between the chilling requirement and the heat requirement, which both played important role in relieving dormancy and flower bud germination.

Key words: Prunus mume, regulation of flowering period, chilling requirement, heat requirement

CLC Number:

S685.17

ZHANG Yuhan, ZHANG Jitang, MA Kaifeng, ZHANG Ruoxi, WEI Linxin, LI Qingwei. Chilling and heat requirements of different Prunus mume cultivars[J]. Acta Agriculturae Zhejiangensis, 2023, 35(5): 1080-1087.

Figures/Tables 6

References 26

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日期 Date	需冷量 Chilling requirement/CU	花芽萌发率germination rate of flower bud/%
日期 Date	需冷量 Chilling requirement/CU	骨里红Gulihong	南京宫粉Nanjinggongfen	早玉蝶Zaoyudie	早花绿萼Zaohualve
2021-09-12	132	1.89	0	0	0
2021-09-17	252	9.52	0	20.57	0
2021-09-19	276	15.19	0	18.20	26.12
2021-09-21	348	18.10	12.34	31.58	50.82
2021-09-23	396	40.25	49.91	63.53	58.40
2021-09-25	420	62.10	40.21	53.29	61.27
2021-09-27	492	75.36	63.52	78.54	60.03

日期 Date	需冷量 Chilling requirement/CU	花芽萌发率germination rate of flower bud/%
日期 Date	需冷量 Chilling requirement/CU	骨里红Gulihong	南京宫粉Nanjinggongfen	早玉蝶Zaoyudie	早花绿萼Zaohualve
2021-09-12	132	1.89	0	0	0
2021-09-17	252	9.52	0	20.57	0
2021-09-19	276	15.19	0	18.20	26.12
2021-09-21	348	18.10	12.34	31.58	50.82
2021-09-23	396	40.25	49.91	63.53	58.40
2021-09-25	420	62.10	40.21	53.29	61.27
2021-09-27	492	75.36	63.52	78.54	60.03

品种 Cultivar	犹他模型不同低温积累量处理的花径 Flower diameter under different low temperature accumulation of Utah model
品种 Cultivar	252 CU	372 CU	492 CU	612 CU	732 CU	852 CU
骨里红Gulihong	2.15±0.12 a	2.13±0.20 a	2.30±0.34 a	2.51±0.15 a	2.53±0.26 a	2.74±0.20 a
南京宫粉Nanjinggongfen	0 c	1.83±0.09 b	1.99±0.22 b	2.24±0.23 b	2.45±0.30 a	2.57±0.15 b
早玉蝶Zaoyudie	1.83±0.15 b	2.05±0.31 a	2.04±0.16 b	2.16±0.21 b	1.98±0.15 b	2.21±0.18 c
早花绿萼Zaohualve	0 c	1.56±0.12 c	1.75±0.12 c	1.53±0.20 c	1.83±0.10 b	2.09±0.26 d

品种 Cultivar	犹他模型不同低温积累量处理的花径 Flower diameter under different low temperature accumulation of Utah model
品种 Cultivar	252 CU	372 CU	492 CU	612 CU	732 CU	852 CU
骨里红Gulihong	2.15±0.12 a	2.13±0.20 a	2.30±0.34 a	2.51±0.15 a	2.53±0.26 a	2.74±0.20 a
南京宫粉Nanjinggongfen	0 c	1.83±0.09 b	1.99±0.22 b	2.24±0.23 b	2.45±0.30 a	2.57±0.15 b
早玉蝶Zaoyudie	1.83±0.15 b	2.05±0.31 a	2.04±0.16 b	2.16±0.21 b	1.98±0.15 b	2.21±0.18 c
早花绿萼Zaohualve	0 c	1.56±0.12 c	1.75±0.12 c	1.53±0.20 c	1.83±0.10 b	2.09±0.26 d

品种 Cultivar	生长度小时模型 Growing degree hours model/ GDH℃	有效积温模型 Effective temperature model/℃
骨里红Gulihong	9 171.14 c	375.50 c
南京宫粉Nanjinggongfen	9 865.46 b	400.65 b
早玉蝶Zaoyudie	9 756.28 b	397.10 c
早花绿萼Zaohualve	10 129.51 a	414.80 a

Chilling and heat requirements of different Prunus mume cultivars

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