College of Forestry, Hebei Agricultural University, Baoding 071001, Hebei, China.
Urban Forest Healthy Technology Innovation Center in Hebei Province, Baoding 071001, Hebei, China.
Ying Yong Sheng Tai Xue Bao. 2023 Sep;34(9):2330-2336. doi: 10.13287/j.1001-9332.202309.008.
To investigate the responses of resin canal area of with different ages to climate change, we analyzed the relationship between the resin canal area and climate factors from 1972 to 2017 in plantation at young age, middle age, near-mature, mature, and over-mature periods in Taiyue Mountains, Shanxi Province. The results showed that 55.7% to 75.2% of resin canal occurred in earlywood. The mature and over-mature periods had the largest resin channel area, sequentially followed by near mature, middle age, and young age periods. Annual mean latewood resin canal area increased significantly in near-mature period and mature period, but not in other periods. There was a significant negative correlation between earlywood resin canal area and minimum temperature during the growing season (May to July) for trees at middle age period. Earlywood resin canal area of mature trees showed significant negative correlation with minimum temperature during the growing season, but significant positive correlation with drought (PDSI) in the non-growing season (previous September to current April). The total area of earlywood resin canal at the young, near-mature, and mature periods was less influenced by climate than other periods. The minimum growing season temperature was a limiting factor to earlywood resin canal growth, while the non-growing season drought gradually became a limiting factor for earlywood resin canal with increasing tree age. The total area of earlywood resin canal decreased with increasing non-growing season drought and increasing growing season minimum temperature. In the context of global warming, the earlywood resin canal area may gradually decrease at all five periods, and the most reduction in the over-mature stage.
为了研究不同年龄阶段树脂道区域对气候变化的响应，我们分析了山西省太岳山幼龄、中龄、近熟、成熟和过熟油松人工林 1972 年至 2017 年树脂道面积与气候因子的关系。结果表明，55.7%~75.2%的树脂道发生在早材。成熟和过熟阶段的树脂道面积最大，其次是近熟、中龄和幼龄阶段。近熟期和成熟期的年平均晚材树脂道面积显著增加，而其他时期则没有显著增加。中龄期树木的早材树脂道面积与生长季（5 月至 7 月）的最低温度呈显著负相关。成熟树木的早材树脂道面积与生长季的最低温度呈显著负相关，但与非生长季（前 9 月至当年 4 月）的干旱（PDSI）呈显著正相关。幼龄、近熟和成熟阶段的早材树脂道总面积受气候的影响小于其他阶段。生长季的最低温度是限制早材树脂道生长的因素，而随着树木年龄的增加，非生长季的干旱逐渐成为限制早材树脂道的因素。早材树脂道总面积随非生长季干旱和生长季最低温度的增加而减少。在全球变暖的背景下，所有五个阶段的早材树脂道面积可能逐渐减少，其中过熟阶段减少最多。
