Sorry, I have not specific data regarding this matter @ M. N. Islam

Na uptake by rice is different for different types of soils. No database is available.

Please log in to the website of  ICAR-CSSRI, Karnal, Haryana, India. Hope you may get some information. Best of luck.

I think it depends on the salinity level i.e. amount of Na+ content present in the soil, varieties of rice because the more sensitive the variety the more will be the uptake.

Dear Azad,

Thank you for your response. I know it depends on salinity level, ESP, SAR, variety, etc. I also have mentioned some situations about my experiment. Do you have any idea about Na concentration in plant tissue of rice in any salt affected condition?

Dear Islam

Sorry, I donot have such result.

 Dear Nazrul

Sodium uptake by actually depends on total biomass production of rice plants. It also depends on the Na concentration of the rice plant tissue. Again the Na concentration also depends on the Na status in the soil. However, there should be a highest level of Na concentration in rice grain as well as rice straw. I will try to give you some information about this fact in the future.

Dear Aminul Islam sir,

Thank you so much for your answer. I completely support your answer. Na concentration in plant tissue depends on several factors such as soil EC, ESP, soluble Na in soil, Ca and K concentration in soil as well as all other essential elements for plant. However, there should be a standard range of concentration in plant tissue (absorbed from soil). We should measure it. We need data about that. 

Dear Dr. Nazrul Islam,

I attach herewith PDF of one old IRRI paper on the subject (Yoshida and Castaneda, 1969). The authors studied relationship between Na and K in rice nutrition under saline and non-saline condition. I hope you'll find this paper interesting and useful.  

Dear Dr. Nazrul,

I add some more information on the issue you have raised.

Asch et al. (1999) studied Na and K uptake of panicles for 8 rice cultivars in field trials under irrigation with saline and fresh water in the hot dry season and the wet season at WARDA in Ndiaye, Senegal. Tolerant cultivars had lower panicle Na content than susceptible ones. Grain weight reduction and spikelet sterility were highly correlated (p < 0.01) with an increase in panicle Na concentration in both seasons. The magnitude of salt-induced yield loss could not be explained with increases in Na uptake to the panicle alone.

Reference: Asch F, Dingkuhn M, Wittstock C and Doerffling K (1999) Sodium and potassium uptake of rice panicles as affected by salinity and season in relation to yield and yield components. Plant Soil 207: 133-145.

Hope you find this input interesting and useful.

Dear Dilip sir,

Thank you so so much. Your information is very much helpful for me as well as researchers in this area. 

Dear MN Islam

You may find information in the following link. I also attached the pdf file of this link.

http://dx.doi.org/10.1626/pps.10.159

Dear Aminul Islam sir,

Thank you so much for your effort and giving me valuable information. I believe your information will be helpful for researchers in this field.  

Dear Nazrul

You mentioned that you have found total Na uptake of 20-30 kg/ha but other found 7-12 kg/ha. Your grain yield was 3-4 t/ha but not mentioned the other's yield as well as straw yield. I think you have to expose your findings regarding Na concentration in rice straw and grain in your own experiment. So, we have opportunity to share your results. Please mind it that we discussing in researchgate a scientific forum.

Dear Nazrul

Consult with the Table 3 of the attached file regarding Na conc. in rice, soil and permissible limit.

Dear Aminul Islam sir,

Thank you for your comments and valuable information. I mentioned approximate same situation. However, grain and straw yield for both experiments were same and straw yield was around same as grain yield.