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Paper Information

Journal:   IRANIAN JOURNAL OF SOIL AND WATERS SCIENCES   2004 , Volume 18 , Number 1; Page(s) 0 To 0.
 
Paper: 

THE EFFECT OF NITROGEN FORMS AND SALINITY ON SUCROSE CONTENT OF TWO LINES OF SALT SENSITIVE AND TOLERANT SUGAR BEET (BETA VULGARIS L)

 
 
Author(s):  YAZDANI M., FARRAHI ASHTIANI S.
 
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Abstract: 
Sugar beet (Beta vulgaris L), after germination and establishment in the soil, can tolerate relatively high levels of salinity. Due to the difference in plants responses to ammonium and nitrate-N under saline and non-saline conditions, and considering the necessity of using the best nitrogen form to achieve the maximum sucroce content and sucrose yield, a pot experiment was carried out on the effect of nitrogen forms on sucrose content of two lines of sugar beets with different salt tolerance. The results showed that with increasing level of irrigation water salinity, nitrate-N in comparison to ammonium-N yielded more roots and shoots in both salt sensitive (22939-196) and salt tolerant (7233-p.29 X Mst) lines. Futhermore, the results showed that salt stress generally increases the proline content of leaf in both lines of sugar beet. The amount of proline in salt-tolerant line was higher than salt-sensitive line. Accumulation of proline under salt stress was more significant in nitrate-N than ammonium-N. The results of chemical analysis of root tissues indicated that there was not any significant difference between the effects of the two nitrogen forms on the percentage of sucrose, extractable sugar and sugar molasses content of the root. The amount of impurity content of roots increased with increasing levels of irrigation water salinity, and when nitrate-N was used instead of ammonium- N.
 
Keyword(s): SUGAR BEET, SUCROSE, NITROGEN FORMS, NITRATE TEST, SALINITY, PROLINE
 
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