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青海省同德县高原河漫滩地区存在乔木状的甘蒙柽柳(Tamarix austromongolica),且在即将修建的水电站库区成林分布,引发了学者和公众在其是否属于古树而需要保护以及如何保护问题上的广泛关注。该研究利用树木年轮学方法,调查了水库淹没区和非淹没区中胸径较大的甘蒙柽柳的树龄,分析了甘蒙柽柳的生长历史及其对环境因素的响应。研究发现胸径较大的甘蒙柽柳可由多株合生形成,测量胸径与植株个体年龄之间无直接联系。该地区甘蒙柽柳径向生长量在20世纪70–80年代迅速提升,80年代后生长趋于平稳。甘蒙柽柳的径向生长响应于7、8月份的水分条件,径流的增加在一定程度上促进了甘蒙柽柳的生长。未成熟植株的径向生长与生长季的风速有着显著的负相关关系。研究结果对甘蒙柽柳特殊形态的形成认知具有理论意义,对该树种保护方案的评估具有实践意义。
The presence of arboreal Tamarix austromongolica in the plateau floodplain in Tongde County, Qinghai Province, and the distribution of forests in the reservoir area of the forthcoming hydropower station have triggered the need for protection by scholars and the public about whether they belong to ancient trees and how to protect them On the widespread concern. In this study, the tree age was used to investigate the age of the ponds with larger diameter in the inundated and non-inundated areas of the reservoir. The growth history and its response to environmental factors were analyzed. The study found that Larvae of Larix gmelinii can be formed by more than one symbiotic, measuring the diameter of the chest and the individual plant age is not directly linked. The radial growth of Tamarix ramosissima rose rapidly in the 1970s and 1980s in the area, and its growth tended to be stable after the 1980s. Radial growth of Tamarix ramosissima In response to the water conditions in July and August, the increase of runoff promoted the growth of Tamarix ramosissima to a certain extent. There was a significant negative correlation between the radial growth of immature plants and the wind speed during the growing season. The results of this study have theoretical significance for the formation of the special morphology of Tamarix chinensis, and it is of practical significance to assess the conservation plan of Tamarix chinensis.