“无刺丰”沙棘品种在山西引种栽培的生长表现

大果沙棘无性系品种“无刺丰”,是当前极有栽培价值的沙棘品种。本研究于2004年春季引进“无刺丰"1年生苗木在山西进行栽培试验,观察其生长适应性表现。结果表明,经过两个生长季,平均树高1.09 m,平均地径1.92 cm。高生长速度比中国沙棘稍慢,但径生长与中国沙棘没有明显差异,营养生长基本正常。定植后两年的保存率在90%以上,与中国沙棘没有明显区别。2006年新梢生长量平均为7.44 cm,变动范围0.3-27.4 cm。春季生长初期和开花期,对零度以下低温冻害的抵抗力以及耐干旱能力比中国沙棘弱,遭遇大雪降温和大风后,嫩芽幼叶很快干枯,出现明显的枝条干缩现象。“无刺丰”在本研究区营养生长基本正常,但生殖生长有待进一步观察研究。直接引进“无刺丰”沙棘品种时仍应慎重。

Growing Performance of Introduced Wucifeng a Large-fruited Variety of Seabuckthorn in Shanxi Province

Wucifeng,a Large-fruited variety of Seabuckthorn(Hippophae rhamnoides L.) was introduced in Shanxi province.Growing characteristics were studied in experiment area.Data on height,collar diameter,new growth and survival rate were collected after two growing seasons.High survival rate(90%) was found.Average tree height was 1.09 m(from 0.59 m to 1.50 m).Average collar diameter was 1.92 cm(from 1.0 cm to 3.1 cm).New growth was 7.44cm(from 0.3 cm to 27.4 cm) during April to July in 2006.Young leaf and bud were seriously affected by snowfall and low temperature in spring season.The majority of twigs were desiccated during April to May.Average height and new growth of Wucifeng were lower than that of Chinese seabuckthorn,however,in terms of collar diameter,there was no obvious difference in both species.Stress tolerance of Wucifeng were no as strong as Chinese seabuckthorn.This study suggested that Wucifeng can have a normal vegetative growth performance,however,a normal reproductive growth need further research effort in experiment area.Direct introducing Wucifeng(a Large-fruited variety of Russion seabuckthorn) must be involved with carefullness in Shanxi province.