【摘要】 为揭示华北落叶松（Larix principis-rupprechtii）不同海拔更新苗对移栽地海拔的适应性规律，为气候变化背景下人工林适应性营造技术优化提供参考，以关帝山林区同一坡面高海拔（2 400 m）和低海拔（1 600 m）带4～5年生华北落叶松天然更新苗为试验材料，将不同海拔更新苗分别移栽至4个海拔带（1 600、1 900、2 100和2 400 m）；移栽1年后，测定不同海拔更新苗叶形态、光合生理特性、养分利用和积累特性及新生枝生长等指标，分析其随移栽地海拔变化发生的变化。结果表明，华北落叶松不同海拔更新苗大部分叶形态和光合生理指标、水分利用效率和非结构性碳水化合物含量及新生枝长均差异显著或极显著。高海拔苗的叶长、叶宽和叶面积及新生枝基部直径均低于低海拔苗，总体表现出光合效率较高、光补偿点较低、水分利用能力较强和可溶性有机物含量较高的特点；且上述特征总体随移栽地海拔与源海拔差异增大而更明显。华北落叶松高海拔更新苗具有一定叶表型、光合生理、水分和养分利用及抗性生理优势，有利于其应对气候变化，实践中开展高海拔带山地育苗具有潜在优势。更多还原

【Abstract】 In order to reveal adaptive rules of Larix principis-rupprechtii regenerated seedlings from different elevations to elevations of transplant sites, and provide references for optimization of plantation adaptive afforestation techniques under climate change situations, taking 4-year-old to 5-year-old L. principis-rupprechtii natural regenerated seedlings from high elevation zone(2 400 m) and low elevation zone(1 600 m) in identical inclines of Guandishan forest district as experimental materials, regenerated seedlings from different elevations were transplanted to 4 elevation zones(1 600, 1 900, 2 100 and 2 400 m). Leaf morphology, photosynthetic physiological characteristics, nutrient utilization and accumulation characteristics, and new branch growths of regenerated seedlings from different elevations were determined after one year of transplantation, and changes of these indexes with elevation changes of transplant sites were analyzed. Results showed that differences of most indexes of leaf morphology and photosynthetic physiology, water utilization efficiencies, contents of nonstructure carbohydrate and new branch lengths between L. principis-rupprechtii regenerated seedlings from different elevations were significant or extremely significant. Leaf lengths, leaf widths, leaf areas and new branch base diameters of seedlings from high elevation were lower than those of seedlings from low elevation. Seedlings from high elevation showed higher photosynthetic efficiencies, lower light compensation points, higher water utilization abilities and higher contents of soluble organic matters. These characteristics of seedlings from high elevation were more obvious with increase of elevation differences between origins and transplant sites in total.L. principis-rupprechtii regenerated seedlings from high elevation had certain advantages in leaf phenotype, photosynthetic physiology, water and nutrient utilization, and resistance physiology, which were conducive to address climate changes. There should be potential advantages to develop mountain seedling in high elevation zones in practices.更多还原