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Acta Horticulturae Sinica ›› 2023, Vol. 50 ›› Issue (4): 724-736.doi: 10.16420/j.issn.0513-353x.2021-1297

• Research Papers • Previous Articles     Next Articles

Adaptability of Peach Under Air Temperature Change Based on Chilling Requirment

YAN Juan1,*, ZHAO Bintao1,2,*, SUN Meng1, SONG Hongfeng1, CAI Zhixiang1, LI Jiyao1,2, SU Ziwen1,2, ZHANG Minghao3, SHEN Zhijun1, XU Jianlan1, MA Ruijuan1, YU Mingliang1,**()   

  1. 1. Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement,Institute of Pomology,Jiangsu Academy of Agricultural Sciences,Nanjing 210014,China
    2. College of Horticulture,Nanjing Agricultural University,Nanjing 210014,China
    3. Forest and Fruit Tree Research Institute,Shanghai Academy of Agricultural Sciences,Shanghai 201403,China
  • Received:2022-09-01 Revised:2022-11-29 Online:2023-04-25 Published:2023-04-27

Abstract:

The objective of this research is to provide reference for the new germplasms creating,new cultivar breeding and regions of peach with low chilling requirement through clarifying the impact of air temperature change on the adaptability. Based on the air temperature data of 12 regions with different geographical locations and climate types in China from 2011 to 2021,this paper evaluates the chilling accumulation of the tested regions for breaking peach dormancy,and counts the chilling requirement of 589 peach resources by 0-7.2 ℃ model. Then,this study analyzes the air temperature change in the studied regions and its impact on the chilling accumulation to judge the peach adaptability challenge and point out some strategies. The results show that the temperature in the regions increased year by year with an average increase of 2 ℃ in 10 years,during the period of peach chilling accumulation from early November to the end of March of the following year,but some great fluctuation of the temperature in some years. There are significant differences of chilling accumulation in various regions. As the reduced latitude (from North to South),the start date of chilling accumulation changes from early to late,and the end date changes from late to early,and days of the chilling accumulation gradually decreased. The average chilling accumulation in each region varies from 4.5 to 1 315 h in 10 years. There is an obvious downward trend of the chilling accumulation year by year in each region with the lower the latitude,the more lowering tendency. In addition,the climate type also affects the chilling accumulation. The decrease of chilling accumulation in each region had a slight or moderate or severe impact on the peach adaptability with different chilling requirement. Based on these results,the range of peach chilling requirement in tested regions is predicted. The range of peach cold requirements for growth in different regions was predicted as follows:< 1 000 h for Beijing,Mengyin,Zhengzhou and Nanjing,600-700 h for Shanghai and Hangzhou,< 400 h for Guilin,< 200 h for Wenshan and Gutian(400 h adaption for some high-altitude areas in Gutian),< 100 h for Fuzhou and < 50 h for Guangzhou. There is non-dormant and evergreen peach in Hainan Province. In the future,the development of peach industry needs to increase the creating and breeding new germplasms and varieties with low chilling requirement,and also optimize the variety layout,and reasonably formulate the south extension cultivation plan.

Key words: peach, chilling requirement, air temperature change, adaptability, challenge

CLC Number: