EFFECT OF NITROGEN ON WHEAT GRAIN YIELD UNDER TERMINAL DROUGHT STRESS

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FARAJI HOUSHANG; SIADAT SEYED ATA ELAH; FATHI GHODRAT ELAH; EMAM Y.; NADIAN HABIB ELAH; RASEKH A.A.R.

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Journal: THE SCIENTIFIC JOURNAL OF AGRICULTURE (SJA) Year:2006 | Volume:29 | Issue:1 Page(s): 99-111

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Title

EFFECT OF NITROGEN ON WHEAT GRAIN YIELD UNDER TERMINAL DROUGHT STRESS

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Keywords

NITROGENQ2

TERMINAL DROUGHTQ2

WHEATQ3

Abstract

Because of uneven distribution of rain over the year and variable water supply either due to shortage of water or failure of the irrigation system, TERMINAL DROUGHT is a major problem for WHEAT growth and yield stability in most regions of Iran. On the other hand, NITROGEN deficiency is a major constraint to WHEAT production in this region. To evaluate the interaction between NITROGEN and water supply, this experiment was conducted in year 2003/2004 at Ramin Agricultural Research and Education Center, Ahwaz, Iran. The experiment was a split- split plot in a completely randomized block design. WHEAT was grown under three irrigation levels (50%, 75% and 100% full irrigation) and two WHEAT cultivars (Yawaroos and Chamran) and four NITROGEN fertilization applications (0, 80, 120 and 180 kg ha-1). Results showed that grain yield increased with increasing N application. Grain yield at 0, 80, 120 and 180 kg N ha-1 was 341.04, 565.19, 625.66 and 651.52 g m-2 respectively. The difference between grain yield of 50% full irrigation treatment with 75% and 100% full irrigation was significant. Grain yield at 50%, 75% and 100% full irrigation was 523.11, 553.58 and 560.80 g m-2 respectively. Yawaroos grain yield (558.45 g m-2) was significantly higher than Chamran grain yield (533.21 g m-2).The interaction between NITROGEN and water supply on grain yield was significant. At zero N level, increasing water supply did not increase grain yield, but at 80, 120 and 180 kg N ha-1 levels, grain yield was improved by increasing water supply. Also, by increasing N levels at any water supply levels, grain yield increased. In all treatments except variety treatment, grain yield increased and was controlled by biomass production and increasing the redistribution of carbon reserves. The difference between grain yield of varieties was due to the difference between their HI. It could be concluded that although reduced irrigation to 50% full irrigation may reduce the potential maximum yield of farmers receiving full irrigation, probably benefits a larger number of farmers and results in greater overall WHEAT production. In addition, increased NITROGEN prior to TERMINAL DROUGHT when there is not water limited may yield satisfactory results seen in all water supply treatments that has been imposed during terminal growth period.

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APA: Copy

FARAJI, HOUSHANG, SIADAT, SEYED ATA ELAH, FATHI, GHODRAT ELAH, EMAM, Y., NADIAN, HABIB ELAH, & RASEKH, A.A.R.. (2006). EFFECT OF NITROGEN ON WHEAT GRAIN YIELD UNDER TERMINAL DROUGHT STRESS. THE SCIENTIFIC JOURNAL OF AGRICULTURE (SJA), 29(1), 99-111. SID. https://sid.ir/paper/24714/en

Vancouver: Copy

FARAJI HOUSHANG, SIADAT SEYED ATA ELAH, FATHI GHODRAT ELAH, EMAM Y., NADIAN HABIB ELAH, RASEKH A.A.R.. EFFECT OF NITROGEN ON WHEAT GRAIN YIELD UNDER TERMINAL DROUGHT STRESS. THE SCIENTIFIC JOURNAL OF AGRICULTURE (SJA)[Internet]. 2006;29(1):99-111. Available from: https://sid.ir/paper/24714/en

IEEE: Copy

HOUSHANG FARAJI, SEYED ATA ELAH SIADAT, GHODRAT ELAH FATHI, Y. EMAM, HABIB ELAH NADIAN, and A.A.R. RASEKH, “EFFECT OF NITROGEN ON WHEAT GRAIN YIELD UNDER TERMINAL DROUGHT STRESS,” THE SCIENTIFIC JOURNAL OF AGRICULTURE (SJA), vol. 29, no. 1, pp. 99–111, 2006, [Online]. Available: https://sid.ir/paper/24714/en

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