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Paper Information

Journal:   DESERT (BIABAN)   2003 , Volume 8 , Number 2; Page(s) 312 To 323.
 
Paper: 

THE EFFECTS OF SALINITY WITH DIFFERENT (CL- )/(S042-) RATIOS AND NITROGEN(N) LEVELS ON WHEAT IN GREENHOUSE CONDITION

 
 
Author(s):  EMAMI H., ASTARAEI A.R., NAGHI ZADEH ASL Z.
 
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Abstract: 

In order to evaluating the effects of different amounts of salinity and CI-/So42- ratios on Nitrogen (N) uptake in wheat, a greenhouse study was conducted through a factorial experiment based on the completely randomized design with three replications. The experimental treatments were three levels of salinity [S1 (2dS/m), and S2 (4dS/m) S3 (8dS/m)], three CI-/So42- ratios [R1 (CI-/So42- =1/2), R2CI-/So42- =1/1) and R3 (CI-/So42- =2/1)] in irrigation water and also two levels of Nitrogen [N1 (100KgN/ha) and N2 (200KgN/ha)]. Results of salinity showed significant reduction (at 5%) in seed germination in S3 in relation to S1 and S2 that were about 15% and 11 % respectively. The decreasing in plant height due to increasing of salinity was not significant. Plant dry matter weight decreased at 83 significantly about 24.5% and 12% in relation to S1 and S2, respectively (at 5%). The comparison of CI-/So42- ratios for seed germination, plant height, and dry matter weight didn't show any significant differences. Increasing the amount of N fertilizer from N1 to N2 resulted in a significant increment in plant dry matter weight. The comparison of interaction effects between CI-/So42- ratios and N fertilizers showed that in soils having R1 and R2 ratios, the increment of N fertilizer could increase the plant dry matter. The result of this study suggest that the use of N fertilizer in saline soils may prevent the stresses of salinity through improvement in growth and yield of wheat only when So42- is a dominant anion or their CI-/So42- ratios are 1:1 and 1:2.

 
Keyword(s): SALINITY, CI- / SO42- RATIO, NITROGEN, WHEAT
 
References: 
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