Regulatory effect of GA and KT on seeds germination of Nitraria tangutorum Bobr. Effect of Sodium Nitroprusside on Lipid Peroxidation and Antioxidant Enzyme Activity of Nitraria tangutorum Bobr. Callus Studies of the Variation of Fruiting-cyme Characters of Nitraria tangutorum Plus Tree Chemical constituents from leaves of Nitraria tangutorum Analysis of Free Amino Acids and Vitamine C in Fruits of Hippophae rhamnoides L., Nitraria tangutorum Bobr. and Berberils dasystachya Maxim Effect of Exogenous Hydrogen Peroxide on the Proline Metabolism in Nitraria tangutorum Bobr. Callus Analysis on community structure and quantitative characteristics of Nitraria tangutorum nebkhas at different succession stage in lower reaches of Shiyang River Response of Leaf Anatomical Characteristics of Nitraria tangutorum Bobr.from Different Populations to Habitats