章古台沙地造林树种选择试验

Forestation Tree Species Selection on Zhanggutai Sandy Land

通过对比栽培试验分析,选择出适宜章固台沙地造林应用的乡土树种刺榆(Hemiptelea davidii)、小叶朴(Celtes Bengeana)、黑桦(Betulasp.),外来树种铅笔柏(Sabina virginiana)和新疆大叶榆(Ulmus laevis)等造林树种。乡土树种在极端气候条件下没有出现任何干枯死亡现象,表现稳定。刺榆的生长量超过大果榆和家榆,小叶朴和桦树也表现出适应性强的特性。引种的外来树种,铅笔柏和新疆大叶榆,虽然在前2～3年发生枯梢现象,但总生长量已超过或接近对照树种,可以在营造混交林中应用。刺榆和铅笔柏选出了不同形态类型,经过不断选择,选育出具有不同形态的树木,可以在不同目的造林中应用。

Through analysis of cultivation experiments, native tree species （Hemiptelea davidii, Celtes bengeana, Betula sp. ）,exotic species （Sabina virginiana and Sabina virginiana） were selected. Native species did not appear of any dry ＆ deaths phenomenon in extreme weather conditions and performed stability. Growth of Hemiptelea da- vidii exceeds Ulmus macrocarpa and Ulrnus pumila ;Celtes bengeana ＆ Betula sp. show stronger adaptability char- acteristics. Die-back phenomenon of Sabina virginiana ＆ Ulmus laevis （introduced exotic species） occurred during the first two to three years,however, the total growth is more than or close to control species;these two species can be applicated in silviculturing mixed forest. With continuous selection,different forms of trees of Hemiptelea davi- dii ＆ Sabina virginiana were selected for applying in planting for different purposes.