Dear Sugirtharan,

I think, it is possible. You may find some inspiration in this article:

Sera, Hruskova, Novakova: Response of the Digitaria sanguinalis (L.) Scop. to the soil salinity - a greenhouse experiment . Ecological Question, 01/2011; 14(1):39-40. DOI:10.2478/v10090-011-0010-y

Best regards, Bozena

Dear Sugirtharan,

What exactly do you think might limit you? From the information you provided,  the work seems feasible, as long as you can induce the salt stress, and maintain other factors constant, to ensure that any variation you may to register is strictly due to treatments. 

Yes it is possible to start the initial work, provided you are able to make all the other factors uniform except the salinity levels which will be your variable, as pointed by Sera and Mukange. However, it will be just a sort of screening to short list either rice cultivars or salinity levels. The shortlisted treatments have to be supported by field study to reach at final conclusions.

paddy needs great amounts of water, so, you must take in consideration the size of the polybag as well as the depth of the soil so that you must leaving enough distance for irrigation. You can make ten replicte or more to confirm your results. My best wishes for success in your research.   

Omaima's suggestions are further explanation for your work and will help you in your research efforts.

Thanks to you all for your valuable answer....I need some more clarifications please.......as the paddy needs stagnation of water so is it possible to plant these paddy without the holes in the poly bag... my doubt is that the if i don't put the holes at the polybag salt ramains (as i am dealing with salt affected soil)  in the polybag and increase the osmotic pressure when water level reduce in bag. so plant may die due to stress. how can i improve this status

Yes, it is very important to have holes in the poly bag because you are dealing with saline soil. In close system, the standing water EC will gradually go high and affect the plants neagatively.Mind that rice is not high tolerant to salinity. Of course, is very high tolerant to sodicity. As soon as EC of standing water in rice growing plants reach 2.0 or above in case of fine rice or 3.0 or above in case of coarse rice, the seedlings will die.