DETERMINATION OF WINTER WHEAT SENSITIVITY INDICES TO MOISTURE STRESS AT DIFFERENT GROWTH STAGES UNDER MASHHAD CLIMATIC CONDITIONS

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ABKHEZR H.R.; GHAHRAMAN B.

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Journal: Iranian Journal of Field Crops Research Year:2004 | Volume:1 | Issue:1 Page(s): 3-12

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Title

DETERMINATION OF WINTER WHEAT SENSITIVITY INDICES TO MOISTURE STRESS AT DIFFERENT GROWTH STAGES UNDER MASHHAD CLIMATIC CONDITIONS

Author(s)

ABKHEZR H.R. | GHAHRAMAN B. | Issue Writer Certificate

Keywords

WINTER WHEATQ3

DEFICIT IRRIGATIONQ2

WATER PRODUCTION FUNCTIONQ4

MASHHADQ3

Abstract

To quantify the effects of moisture stress at different WINTER WHEAT (C-73-5) growth stages, a field experiment was set up at MASHHAD in a complete random block design with seven treatments and three replications. The treatments were basin irrigation with water cut in a specified growth stages and a control treatment. Soil moisture was measured during the experiment by a neutron meter, and hence, crop actual evapo-transpiration was calculated by water balance method. Low rainfall amount did not disturb the treatments. The results showed that the treatments under water stress had a pronounced dry moisture profiles. Deep percolation was computed by subtracting moisture profiles at two consecutive time intervals. The computed sensitivity indices showed that flowering stage is the most sensitive stage, which is verified by other researchers. However, the derived values were not in harmony with these studies. Wheat variety, degree of stress, and other unknown reasons may support these differences. Leaf area index and crop height were more sensitive during flowering stage. Statistical analysis showed that the most influencing parameters on yield, leaf area index and crop height were due to water stress at flowering, tillering, and elongation stages, respectively. It observed, through comparison of means that the effect of stress on yield at flowering stage in mostly due to low spike rather than grain weight and number of grains per spike. We derived some models for predicting yield per unit of land also per unit of consumed water. However, the latter had lower correlation coefficients that the former.

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APA: Copy

ABKHEZR, H.R., & GHAHRAMAN, B.. (2004). DETERMINATION OF WINTER WHEAT SENSITIVITY INDICES TO MOISTURE STRESS AT DIFFERENT GROWTH STAGES UNDER MASHHAD CLIMATIC CONDITIONS. IRANIAN JOURNAL OF FIELD CROPS RESEARCH, 1(1), 3-12. SID. https://sid.ir/paper/119236/en

Vancouver: Copy

ABKHEZR H.R., GHAHRAMAN B.. DETERMINATION OF WINTER WHEAT SENSITIVITY INDICES TO MOISTURE STRESS AT DIFFERENT GROWTH STAGES UNDER MASHHAD CLIMATIC CONDITIONS. IRANIAN JOURNAL OF FIELD CROPS RESEARCH[Internet]. 2004;1(1):3-12. Available from: https://sid.ir/paper/119236/en

IEEE: Copy

H.R. ABKHEZR, and B. GHAHRAMAN, “DETERMINATION OF WINTER WHEAT SENSITIVITY INDICES TO MOISTURE STRESS AT DIFFERENT GROWTH STAGES UNDER MASHHAD CLIMATIC CONDITIONS,” IRANIAN JOURNAL OF FIELD CROPS RESEARCH, vol. 1, no. 1, pp. 3–12, 2004, [Online]. Available: https://sid.ir/paper/119236/en

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