广西红锥人工林径向生长的季节格局及其对气候因子的响应

刘士玲, 杨保国, 郑路, 舒韦维, 闵惠琳, 张培, 李华, 杨坤, 周炳江, 田祖为

Seasonal stem radial growth of Castanopsis hystrix plantation and its response to climatic factors in Guangxi, China

LIU Shi-Ling, YANG Bao-Guo, ZHENG Lu, SHU Wei-Wei, MIN Hui-Lin, ZHANG Pei, LI Hua, YANG Kun, ZHOU Bing-Jiang, TIAN Zu-Wei

图2 2018年5月12-25日从原始数据中提取的径向生长量和树木水分亏缺量。A为红锥每小时测量的径向变化量值(黑线)。紫色线表示基于ZG概念(Zweifel, 2016)确定的树木水分亏缺期, 该概念假设在径向收缩时(树木水分亏缺期)没有生长诱导的不可逆生长。阴影区域表示不可逆的径向生长期(当树木水分亏缺量为零时)。

Fig. 2 Extracting growth-induced irreversible stem expansion and tree water deficit-induced stem shrinkage (TWD) from hourly recorded stem radius variation (SRV). A is hourly measured SRV during12 to 25 May 2018 (black line). The purple line is based on the ZG concept (Zweifel, 2016) which assumes no growth-induced irreversible expansion (GRO) during periods of stem shrinkage (= periods of TWD). Shaded areas indicate periods of GRO (when TWD is zero).