Stem radial growth of Picea crassifolia in response to climatic factors in the western Qilian Mountains, China

doi:10.13287/j.1001-9332.202110.020

Abstract

Abstract: The radial growth of eight individuals of Picea crassifolia and environmental factors were monitored by Dendrometer and automatic meteorological station in the western Qilian Mountains. The Gompertz function fitted results showed that the radial growth of P. crassifolia started on April 19, April 17, and April 10 in 2018, 2019 and 2020, respectively, and that the radial growth started when daily mean temperature exceeded 5.5 ℃. The radial growth of P. crassifolia ended on August 17, August 21, and July 19 in the three years, respectively. The ending time of radial growth was related to precipitation at the end of growing season. The radial growth of P. crassifolia was strongly inhibited by drought, and it had the strongest correlation with daily mean temperature (negative correlation) and daily precipitation (positive correlation) in July. The correlation of radial growth with the daily precipitation in the early growing season (May) showed significant inter-annual variation.

Key words: Picea crassifolia, dryland forest, environmental factor, stem radial growth, Dendrometer

XIA Jing-qing, GOU Xiao-hua, WANG Ling-ling, WANG Fang, ZHANG Jun-zhou, ZHANG Fen. Stem radial growth of Picea crassifolia in response to climatic factors in the western Qilian Mountains, China[J]. Chinese Journal of Applied Ecology, 2021, 32(10): 3585-3593.

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