JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2020, Vol. 44 ›› Issue (5): 49-54.doi: 10.3969/j.issn.1000-2006.201903010

Special Issue: 色叶树木与木本花卉专题

Previous Articles     Next Articles

Phenological stability of ornamental crabapple and its response to temperature change

CHU Wuyue1(), FAN Junjun1, ZHANG Wangxiang1,2,*()   

  1. 1. College of Forestry, Nanjing Forestry University, Nanjing 210037,China
    2. Yangzhou Small Apple Gardening Co., Ltd., Yangzhou 225200,China
  • Received:2019-03-04 Revised:2020-02-23 Online:2020-10-30 Published:2020-10-30
  • Contact: ZHANG Wangxiang E-mail:601170230@qq.com;malus2011@163.com

Abstract:

【Objective】We study the phenological characteristics of the early-flowering stage of several varieties of ornamental crabapple, to explore the internal relationship between the flowering stage and temperature, and to reveal the differences and changes in flowering stability at a variety level. 【Method】Four-year phenological data from 67 varieties of ornamental crabapple were analyzed to determine the stability of multiple ornamental crabapple varieties, and the results of standard deviation of phenology (σ) of multiple varieties of ornamental crabapple were studied using temperature data over many years. 【Result】From 2014 to 2016, there was a strong correlation of the date sequence of early flowering with that of 2013. The σ value of late-flowering varieties was higher than that of early-and mid-flowering varieties. There was a significant negative correlation (P<0.05) between the σ value of the early florescence and middle florescence; this correlation was also noted between the σ value of the late florescence and days with temperature below 6 ℃ from October 1st to December 1st in the year before florescence, between the σ value of the late florescence and days with a temperature below 4 ℃ (P<0.05) from October 1st to February 1st in the year before florescence, and between October 1st to March 1st in the year before florescence. 【Conclusion】 A low temperature has an important effect on the stability of ornamental crabapple at the early-flowering stage. The varieties in the early-and mid-flowering stage required a lower temperature than that required at the late-flowering stage, and the time limit for breaking dormancy was more strict. In contrast, the stability of the early-flowering sequence among the late-flowering varieties was lower.

Key words: ornamental crabapple, florescence phenological order, flowering phenology, low temperature, standard deviation

CLC Number: