Time interval between budburst and leaf-out of subtropical woody species is shortened by increases in both seasonal and diurnal temperatures,Agricultural and Forest Meteorology

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Time interval between budburst and leaf-out of subtropical woody species is shortened by increases in both seasonal and diurnal temperatures
Agricultural and Forest Meteorology ( IF 5.6 ) Pub Date : 2024-10-11 , DOI: 10.1016/j.agrformet.2024.110254
Xiu Zeng, Xinyang Wang, Qianhuai Xue, Yanjun Du

Spring phenology has noticeably changed with changes to diurnal temperature (daytime temperature vs. night-time temperature) and seasonal temperature (winter chilling vs. spring forcing) around the globe. However, the climate cues influencing the days of interval between budburst and leaf-out have not been studied. Here, we conducted two experiments to simulate how changes in diurnal temperature or seasonal temperature influence spring leaf phenology (budburst, leaf-out and the interval between them) for subtropical woody species in eastern China. We found that prolonged chilling and higher forcing temperatures advanced both budburst and leaf-out and shortened the interval between the two, but the interval was more strongly influenced by chilling than by forcing. The budburst, leaf-out, and the interval between these events each responded more strongly to changes in daytime temperature than to changes in night-time temperature. The budburst event was more responsive to diurnal and seasonal temperatures than leaf-out event. Our findings offer insight into how seasonal and diurnal temperature regulate spring phenology. Such advancements improve our understanding and ability to accurately predict the response of woody ecosystems to a changing climate.

更新日期：2024-10-12

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