榆林沙区沙地柏天然林设置沙障与压条更新恢复效果研究

Restoration of Natural Sabina vulgaris in Sandy Area of Yulin through Layering and Sand Barrier Establishment

为促进榆林沙区唯一常绿灌木树种——沙地柏天然林更新恢复,选择半固定沙地、流动沙地和丘间地,进行了设置沙障和匍匐茎埋沙对沙地柏植株产生不定根、萌发新枝的效果观察研究,结果为在试验的3种环境和2种技术条件下,不管是迎风坡、流沙坡的中部及下部,还是丘顶或沙梁,沙地柏都会产生不定根、萌发新枝,且生长正常,沙障规格和压条长度、压沙厚度不同不定根及新枝的数量和长度不同。建议在半固定和流动沙地设置规格为1.5 m×1.5 m或为2.0 m×2.0 m的沙障,匍匐茎压条时,以埋沙厚20~30 cm、压条长10~30 cm为宜。

In order to promote the regeneration and restoration of the natural forest of the evergreen shrub species Sabina vulgaris in Yulin sandy area,experiment was conducted in three sites:semi-fixed sand,flowing sand,and interval site between sand dunes.The propagation was conducted by layering and establishment of sand barrier.The result showed that Sabina vulgaris developed adventitious roots and new shoots in all sites and propagation techniques with normal growth,whether on windward slopes,upper or lower position of moving sand dunes,or at the top,though varying with the barrier specifications,length of stems,depth of sand layer buried.It is recommended to set sand barriers of 1.5 m×1.5 m or 2.0 m×2.0 m in semi-fixed and flowing sand,with sand layer 20cm~30 cm in depth and stem length 10~30 cm in length.