Compared with Zygophyllum xanthoxylum,Reaumuria soongorica and Nitraria tangutorum,the drought-resistant characteristics of Allium mongolicum was studied on morphological structure,physiological and growth characteristics.The results showed that A.mongolicum had quite strong ability to adapting to air and soil drought.It could settle and grow at places where precipitation was lower than 40 mm.It grew well in sand soil with more than(1.99±0.21)% soil moisture in 0-15 cm layer.If soil moisture was(0.885±0.12)...