合肥市园林树种抗初冬雪压特性的研究

通过对合肥市2009年初冬雪灾后园林树种受损情况的调查,分析得出:(1)受雪压的树种中香樟、杨树、雪松、乌桕、悬铃木平均每株断枝、干数在30枝以上,抗雪压能力很差;朴树、广玉兰、羽毛枫、无患子等平均每株断枝、干数在20~30枝,抗雪压能力差;紫叶李、女贞、国槐、圆柏等平均每株断枝、干数在10~20枝,抗雪压能力中等;白榆、柳树、栾树、蜀桧、池杉、黄连木等平均每株断枝、干数在10枝以下,抗雪压能力较强;(2)常用的15种园林树木中,香樟、悬铃木、雪松、合欢、女贞、紫叶李等在胸径30 cm以下的断枝、干数量较多,平均每种断枝、干数为2 469枝,抗雪压能力较弱;在胸径30 cm以上的15种树种断枝、干数量较少,平均每种断枝、干数为117枝,抗雪压能力较强。通过以上研究,发现合肥市园林树种抗雪压能力的差异,为城市园林树种规划提供理论依据,也为在灾害天气来临时提前做好园林树种的保护措施提供参考。

Characteristics of garden trees in resistance to the early winter snow in Hefei

Through the investigation of the damaged garden trees in Hefei city after snow disaster in early winter of 2009, we could make conclusion as follows. (1) The abilities of anti-snow pressure, with average number in broken branches and trunks, are obviously different, Cinnamomum camphora, Populus canadensis cv.I, Cedrus deodara, Sapium sebiferum and Platanus acerifolia, with average number above 30, is poor; for Celtis tetrandra, Magnolia grandiflora, Acer palmatum cv.Dissecum, Sapindus mulorossi ect, with average number between 20 and 30, shows relatively poor; for Prunus ceraifera cv. Ateopurpurea, Ligustrum lucidum, Sophora japonica, Sabina chinensis ect, with average number between 10 and 20 , gets medium; for Ulmus pumila, Salix babylonica, Koelreuteria paniculata, Sabina komarovii, Taxodiu mascendens, Pistacia chinensis, with average number below 10 , becomes strong ; (2) Among 15 common garden tree species, Cinnamomum camphora, Platanus acerifolia, Cedrus deodara, Albizia julibrissin, Ligustrum lucidum and Prunus ceraifera cv. Ateopurpurea with DBH below 30 cm, having 2 469 broken breaches and trunks per species, were damaged seriously and have a poor ability in anti-snow pressure, while those with DBH above 30 cm having 117 broken breaches and trunks per species, have a strong ability in anti-snow pressure. The result indicates that the garden trees in Hefei city have different abilities in anti-snow pressure, which would provide a reference for taking proper protective measures for garden trees before weather disaster.