DETERMINATION OF SOIL AND PLANT WATER BALANCE AND ITS CRITICAL STAGES FOR RAINFED WHEAT USING CROP WATER STRESS INDEX (CWSI)

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FEIZIASL V.; FOTOVAT A.; ASTARAEI A.; LAKZIAN A.; MOUSAVI SHALMANI M.A.

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Journal: Journal of Water and Soil Year:2014 | Volume:28 | Issue:4 Page(s): 804-817

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Title

DETERMINATION OF SOIL AND PLANT WATER BALANCE AND ITS CRITICAL STAGES FOR RAINFED WHEAT USING CROP WATER STRESS INDEX (CWSI)

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Keywords

CROP WATER STRESS INDEX (CWSI)Q1

WATER STRESS THRESHOLDQ2

SOIL AND PLANT WATER BALANCEQ2

NITROGENQ2

RAINFED WHEAT GENOTYPESQ2

Abstract

In order to determination of WATER STRESS THRESHOLD and dryland wheat genotypes water status in different NITROGEN managements, this experiment was carried out in split split plot RCBD design in three replications in 2010-2011 cropping year. Treatments included: N application time (whole fertilization of N at planting time, and its split fertilization as 2.3 at planting time and 1.3 in early spring), N rates (0, 30, 60 and 90 kg ha-1) and 7wheat genotypes. Also these genotypes were grown in supplemental irrigation condition for calculation of crop water stress index (CWSI) parameters. Canopy temperature (Tc) was measured in flowering and early milk ingstages. Crop water stress index (CWSI) was calculated. A non-water stressed baseline (lower baseline) werefitted as Tc-Ta=4.523-3.761×VPD; R2=0.92 and non-transpiring baseline (upper baseline) determined 6oC for rainfed wheat genotypes. WATER STRESS THRESHOLD was 0.4 and crossing of that occurred 8 days before heading stage. In WATER STRESS THRESHOLD boundary, was depleted 60 mm available water from 0 to 50 cm soil depth. There was negative significant relationship (p<0.01) between CWSI and grain yield in all treatments and different NITROGEN rates. NITROGEN application reduced water stress and increased grain yield of rainfed wheat genotypes. Ohadi and Rasad genotypes showed highest resistance to water stress and high grain yield production for N30 insplit and planting time application, respectively. Cereal4 and Rasad genotypes were suitable for N60 applicationin split and planting time application, respectively.

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APA: Copy

FEIZIASL, V., FOTOVAT, A., ASTARAEI, A., LAKZIAN, A., & MOUSAVI SHALMANI, M.A.. (2014). DETERMINATION OF SOIL AND PLANT WATER BALANCE AND ITS CRITICAL STAGES FOR RAINFED WHEAT USING CROP WATER STRESS INDEX (CWSI). JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY), 28(4), 804-817. SID. https://sid.ir/paper/141222/en

Vancouver: Copy

FEIZIASL V., FOTOVAT A., ASTARAEI A., LAKZIAN A., MOUSAVI SHALMANI M.A.. DETERMINATION OF SOIL AND PLANT WATER BALANCE AND ITS CRITICAL STAGES FOR RAINFED WHEAT USING CROP WATER STRESS INDEX (CWSI). JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY)[Internet]. 2014;28(4):804-817. Available from: https://sid.ir/paper/141222/en

IEEE: Copy

V. FEIZIASL, A. FOTOVAT, A. ASTARAEI, A. LAKZIAN, and M.A. MOUSAVI SHALMANI, “DETERMINATION OF SOIL AND PLANT WATER BALANCE AND ITS CRITICAL STAGES FOR RAINFED WHEAT USING CROP WATER STRESS INDEX (CWSI),” JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY), vol. 28, no. 4, pp. 804–817, 2014, [Online]. Available: https://sid.ir/paper/141222/en

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