甘肃省河西走廊干旱荒漠区文冠果不同种源造林效果

为选择适宜于甘肃省河西走廊干旱荒漠区造林的文冠果种源,在红沙窝荒漠化综合防治试验站文冠果林木良种基地进行了不同种源的造林试验,结果表明:红沙窝试验区种源地文冠果种子培育的苗木造林成活率较河南灵宝、三门峡种源地的苗木成活率分别高59.26%和50.88%,较内蒙古赤峰的苗木成活率高24.15%,较甘肃庆阳的苗木成活率高10.51%;不同种源地文冠果种子培育的苗木在试验区造林后苗高、地径、主根生长量、侧根数及生物量指标由大到小均依次为红沙窝试验区种源、甘肃庆阳种源、内蒙古赤峰种源、河南三门峡种源、河南灵宝种源;在甘肃省河西走廊干旱半干旱地区建设文冠果能源林时,应尽量选用本地种源或与造林地气候条件、立地条件等基本相似地区种源培育的苗木。

Planting effect of Xanthoceras sorbifolia from different provenances in Hexi Corridor of Gansu province arid desert area

In order to choose the appropriate Xanthoceras sorbifolia source for the afforestation in Gansu Hexi Corridor arid desert area,the afforestation experiments of Xanthoceras sorbifolia from different sources were carried out at Xanthoceras sorbifolia Breeding Base of Hongshawo Test Station for Desert Comprehensive Control.The results showed that the survival rate of Xanthoceras sorbifolia seedlings in Hongshawo test area was 59.26 ％ higher than that in Henan Lingbao,50.88％ higher than that in Sanmenxia city,24.15％ higher than that in Chifeng of Inner Mongolia,and 10.51％ higher than that in Qingyang of Gansu province.The descending order of the height growth,diameter growth,root growth,lateral root number and biomass of Xanthoceras sorbifolia afforestations in different places was:The Hongshawo test area provenance＞ Qingyang provenance in Gansu＞ Inner Mongolia provenance in Chifeng ＞Sanmenxia provenance in Henan＞ Lingbao provenance in Henan.For constructing Xanthoceras sorbifolia energy forest in Hexi corridor of Gansu province arid and semi-arid region,the seedlings that adjust to the climate conditions and site conditions of the forestation site are preferred.