Maize response to water, salinity and nitrogen levels: soil and plant ions accumulation

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AZIZIAN A.; Sepaskhah A. R.

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Journal: Iran Agricultural Research Year:2020 | Volume:39 | Issue:1 Page(s): 1-12

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Title

Maize response to water, salinity and nitrogen levels: soil and plant ions accumulation

Author(s)

AZIZIAN A. | Sepaskhah A. R. | Issue Writer Certificate

Keywords

ions accumulationQ1

salinity and nitrogen stressesQ1

threshold concentrationQ1

water stressQ2

yield reductionQ2

Abstract

In the present study, some nutritional imbalances, specific ion toxicity and yield-ion concentration relationships in maize under water, nitrogen (N) and salinity stresses were assessed. Effect of different levels of irrigation water (I1=1. 0ETc+0. 25ETc as leaching, I2 =0. 75I1 and I3 =0. 5I1) as main plot, salinity of irrigation water (S1=0. 6, S2= 2. 0 and S3=4. 0 dS m-1) as sub-plot and N fertilizer rates (N1=0, N2=150 and N3=300 kg N ha-1) as sub-sub-plot on maize (cv SC 704) were investigated in a splitsplit-plot design with three replications during 2009 and 2010. Results showed that salts accumulated in soil were 28. 4% higher in I2 compared with other irrigation treatments. Soil nitrate concentration was statistically higher under I3 and S1 treatments (83% and 10%, respectively) compared with other irrigation and salinity levels. There was no K+ deficiency caused by salinity; however, salinity resulted in statistically lower K+/Na+ compared with no saline conditions. Plants took up 25% higher N in I2 compared with other irrigation levels. Furthermore, N uptake by plants decreased by an average of 18% under salinity condition indicating that higher N application rate above the required level under saline water application put the environment at the risk of groundwater N contamination. Results of this study confirmed the fact that Na+ accumulation in soil was more detrimental than Cl-accumulation for maize irrigated with saline water. Besides, according to threshold values for soil ions, the optimum levels of irrigation and N fertilizer for maize might be lower under saline water application. Furthermore, based on the grain yield reduction coefficient, maize required a higher level of K+ and K+/Na+ under deficit saline water irrigation for avoiding yield losses

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APA: Copy

AZIZIAN, A., & Sepaskhah, A. R.. (2020). Maize response to water, salinity and nitrogen levels: soil and plant ions accumulation. IRAN AGRICULTURAL RESEARCH, 39(1 ), 1-12. SID. https://sid.ir/paper/360449/en

Vancouver: Copy

AZIZIAN A., Sepaskhah A. R.. Maize response to water, salinity and nitrogen levels: soil and plant ions accumulation. IRAN AGRICULTURAL RESEARCH[Internet]. 2020;39(1 ):1-12. Available from: https://sid.ir/paper/360449/en

IEEE: Copy

A. AZIZIAN, and A. R. Sepaskhah, “Maize response to water, salinity and nitrogen levels: soil and plant ions accumulation,” IRAN AGRICULTURAL RESEARCH, vol. 39, no. 1 , pp. 1–12, 2020, [Online]. Available: https://sid.ir/paper/360449/en

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