中南林业科技大学学报2025，Vol.45Issue(8)：86-94,9.DOI:10.14067/j.cnki.1673-923x.2025.08.009
塞罕坝3个树种内在水分利用效率与生长的关系及其对气象因子的响应
Response of intrinsic water-use efficiency to meteorological factors and the relationship between the intrinsic water-use efficiency and the growth of three tree species in Saihanba area
摘要
Abstract
[Objective]To investigate the relationship between intrinsic water-use efficiency(iWUE)and forest growth of different afforestation species and their response to meteorological factors in the Saihanba area,and to provide a scientific basis for forest management in the context of global warming.[Method]This study took Larix principis-rupprechtii,Pinus sylvestris var.mongolica and Picea meyeri in the Saihanba area as the research objects,and analyzed the relationship between iWUE and BAI and their responses to indicators such as temperature and SPEI,based on the climatology of the annual rings of the tree and stable carbon isotope techniques.[Result]The results of the study showed that the water use efficiency of all three tree species showed a gradual increase over the 43-year period from 1975 to 2018 and had similar interannual trends,but the rate of increase varied,from fastest to slowest were Picea meyeri,Pinus sylvestris and Larix principis-rupprechtii,which rose at rates of 9.70,5.75 and 4.40 μmol·mol-1·(10 a)-1;BAI of Larix principis-rupprechtii showed a significant negative correlation with iWUE(P＜0.01).There was a positive correlation between BAI and WUEi in Picea meyeri,but it did not reach a significant level(P＞0.05)and there was no significant correlation between BAI and iWUE of Pinus sylvestris;The iWUE of all three species was significantly and positively correlated with the average temperature in July and the growing season of the year,negatively correlated with the rainfall in July and the growing season,and significantly and negatively correlated with the SPEI in all periods.[Conclusion]Combining the changes in iWUE of the three species and their relationship with BAI,Picea meyeri is more adaptable to future warm-drying climate change in the region,and Larix principis-rupprechtii is relatively less adaptable.关键词
华北落叶松/樟子松/云杉/径向生长/气象因子/内在水分利用效率Key words
Larix principis-rupprechtii/Pinus sylvestris/Picea meyeri/radial growth/climatic factors/iWUE分类
农业科技引用本文复制引用
杨晨阳,于沛,许中旗,张菲,付立华,程顺..塞罕坝3个树种内在水分利用效率与生长的关系及其对气象因子的响应[J].中南林业科技大学学报,2025,45(8):86-94,9.基金项目
河北省林草关键技术创新与示范项目(2303087). （2303087）
