唐古特白刺种源试验

PROVENANCE TEST OF THE GROWTH OF NITRARIA TANGUTORUM

唐古特白刺（Nitrariatangutorum）为蒺藜科白刺属灌木，是干旱、半干旱荒漠地区优良的固沙树种之一，也是重要开发利用的经济植物。我们从青海德令哈、吐鲁番、玉门和民勤等地引进4个不同地理的唐古特白刺种源，在民勤沙生植物园进行对比试验。研究结果表明，种源间的株高、地径、冠幅等生长量存在显著差异，生长表现均以来自民勤地区的种源最好，吐鲁番和玉门的较好，青海的次之。同时，这些不同地区的种源都具有抗旱、抗寒、抗风固沙和经济价值较高等优良特性。

Nitraria tangutorum,a bush belonging to Nitraria genus in Zygophyllaceae,is one of elite plants for desert control and a potential plant for utilization as well in arid and semi-arid areas. Its 4 seed sources had been introducted from Delinha in Qinghai,Turfan in Xinjiang,Yumen and Minqin in Gansu ;and were tested in Minqin Botanical Garden.The results show that the marked differences were in heights,ground diameters,crown diameters,etc. The growing performance of 4 seed sources in descent order are the seed source from Minqin,the seed source from both Turf an and Yumen,the seed source from Qinhai. In addition,the seed sources all have excellent characteristics in drought-resistance,cold resistance,sand-fixation and high economic value.