Abstract: Drought stress affects plant growth and development,often causes serious crops production reduction,for the first place in all of the abiotic stress damage,is one of the major natural disasters leading to forage grass production,animal husbandry production economic loss. A mimic drought stress was designed for 3 Dactylis glomerata in Xinjiang,three drought resistance index of proline,soluble sugar and MDA were determined after drought induced for 4,8,and 12 days. The results indicate: with aggravation of drought stress,the proline and MDA were increasing,while the soluble sugar initial declined,then increased. Relevant analysis results showed the relationships were significantly positive between soluble sugar and MDA and the correlation coefficient is 0.664.Although there was correlation among Proline and soluble sugar and malondialdehyde,but no significant correlation,the correlation coefficient was 0.071 and 0.389,respectively. It is thus clear that in the drought stress environment,three physiological indexes have different accumulation process,proline accumulation first,after the proline accumulation to a certain extent,a large number of accumulations of soluble sugar and malondialdehyde are following. Through the comparison of three physiological indexes,the Dactylis glomerata in Zhaosu showed better drought resistance of three areas. Drought resistance of Dactylis glomerata is a complex physiological process,has close relations with its varieties,survival environment. How to better evaluate the drought resistance and its mechanism of Dactylis glomerata,it is necessary to conduct an in-depth research.

Key words: drought stress, Dactylis glomerata, physiological characteristics, drought resistance