Radial growth of Larix principis-rupprechtii and responses to drought events under different forest management models

doi:10.13287/j.1001-9332.202506.002

Abstract

Abstract: In 2014, we implemented three management models, unmanaged (the control), the structured management and the close-to-nature management, for 20-year-old Larix principis-rupprechtii plantations in Saihanba Mechanical Forest Farm, Hebei Province. We collected tree-ring core samples in 2023 and analyzed the responses of radial growth of L. principis-rupprechtii to four drought events (2001-2002, 2006-2010, 2015 and 2018) before and after the establishment of management models. The results showed that after management, the radial growth (average during 2015-2022) increased by 2.0% (control), 4.1% (structured management) and 3.1% (close-to-nature management) compared to the pre-management levels (average during 1989-2014), with the structured management demonstrating superior growth enhancement over the other two management models. Compared with pre-management, the resistance of the radial growth of L. principis-rupprechtii to drought events improved after management, whereas the recovery and resilience decreased. After management, the radial growth response of L. principis-rupprechtii to drought events differed across management models. The recovery, recovery rate, and resilience of the radial growth of L. principis-rupprechtii were significantly lower in the control and the close-to-nature management, whereas the recovery time was longer than that in the structured management. In conclusion, the structured management promoted the radial growth of L. principis-rupprechtii plantations under frequent droughts, which are suitable for these forests.

Key words: Larix principis-rupprechtii, forest management, radial growth, drought

JIA Jianheng, HOU Shuhang, CI Kefan, GUO Mingming, FU Lihua, ZHANG Yan. Radial growth of Larix principis-rupprechtii and responses to drought events under different forest management models[J]. Chinese Journal of Applied Ecology, 2025, 36(6): 1708-1714.

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