The Effect of Salinity on Maize Yield in Various Growth Stages
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Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:
Increasing population growth and reducing water resources have led to use low-quality water resources in agricultural sector. In this study a factorial experiment in a randomized complete block design was conducted to apply salinity stress on one and two stages of maize growth period. Irrigation water salinity treatments including four levels; S1(1.5), S2(2.5), S3(4.0) and S4(5.5 dS.m-1) and the application time (growth stages) of salinity stress including six levels; 4-leaf stage (P1), flowering stage (P2), milking stage (P3), 4-leaf and flowering stages (P1P2), 4-leaf and milking stages (P1P3) and flowering and milking stages (P2P3) were performed. At the end of growth period, the highest maize yield (136.8 g/plant) was corresponded to P1S1 treatment the lowest one (41.7 g/plant) was corresponded to P2P3S4 treatment. The maize yield increased 17 and 33% in P1P3 and P1P2 treatments as compared to P3 and P2 treatments, respectively, although they received salinity stresses two times during their growing periods.  While, the yield reduced 6.2 and 23% in P2P3 treatment as compared to P2 and P3 treatments, respectively. The results showed that the application of salinity stress in the early growth stages makes the crop to be resistant to salinity stress during the sensitive growth stages. Therefore, the application time of saline water will be important in terms of conjunction use of fresh and saline water resources.
Language:
Persian
Published:
Iranian Journal of Soil and Water Research, Volume:50 Issue: 8, 2019
Pages:
1975 to 1983
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