EVALUATING NITROGEN NUTRITION INDEX OF WHEAT (TRITICUM AESTIVUM L.) FIELDS IN GORGAN

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ZEINALI E.; SOLTANI A.; GALESHI S.; MOVAHEDI NAEINI S.A.R.

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Journal: Journal of Plant Production Research Year:2012 | Volume:19 | Issue:4 Page(s): 137-156

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Title

EVALUATING NITROGEN NUTRITION INDEX OF WHEAT (TRITICUM AESTIVUM L.) FIELDS IN GORGAN

Author(s)

ZEINALI E. | SOLTANI A. | GALESHI S. | MOVAHEDI NAEINI S.A.R. | Issue Writer Certificate

Keywords

WHEATQ2

NITROGEN NUTRITION INDEXQ2

CRITICAL N CONCENTRATIONQ2

DRY MATTER YIELDQ2

Abstract

There is no report on the nitrogen nutrition status of WHEAT fields using NITROGEN NUTRITION INDEX (the ratio of the total actual N to CRITICAL N CONCENTRATION at any time course of the crop growth period) method in Iran. Hence, this study was carried out to evaluate the N nutrition status of 16 selected WHEAT fields in Gorgan during 2006-2007 growing season. Plant sampling were conducted in six growth stages during WHEAT growing season to determine DRY MATTER YIELDs, actual N concentration, CRITICAL N CONCENTRATION and NNI. Soil samples were provided from 0 to 30 and 30 to 60 soil layers to determine some of physical and chemical characteristics, and NO3-N and NH4-N at the early season. Based on the obtained results, DRY MATTER YIELDs of fields were varied from 0.38 ton ha- at the beginning tillering to 12.51 ton ha- at the harvesting maturity. The mean of N concentrations (%) in plant dry matter were 3.09 at beginning tillering, 2.60 at complete tillering, 1.62 at stem elongation, 1.56 at boot stage, 1.14 at the beginning watery ripe stage and 1.08 at harvesting maturity. These results indicate that the most reduction in N concentration occurred in stem elongation stage, and that N concentration in plant dry matter decreased as plants developed. Actual N concentrations in dry matter were substantially less than CRITICAL N CONCENTRATIONs at all development stages; The means of CRITICAL N CONCENTRATIONs at above mentioned development stages were 4.38, 4.33, 2.88, 2.32, 1.95 and 1.72, respectively. Then, the means NNI for 16 WHEAT fields were very lower than optimum (NNI=1) at all development stages; 0.71 at beginning tillering, 0.59 at complete tillering, 0.57 at stem elongation, 0.68 at boot stage, 0.59 at the beginning watery ripe stage and 0.61 at harvesting maturity. Based on these findings, N nutrition status in studied WHEAT fields was unsuitable through growing season, and that N can be considered as one of the limiting factors for WHEAT growth and yield in these fields. Finally, the obtained results indicated that achieving potential yield of this region using current N management is impossible.

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APA: Copy

ZEINALI, E., SOLTANI, A., GALESHI, S., & MOVAHEDI NAEINI, S.A.R.. (2012). EVALUATING NITROGEN NUTRITION INDEX OF WHEAT (TRITICUM AESTIVUM L.) FIELDS IN GORGAN. JOURNAL OF PLANT PRODUCTION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 19(4), 137-156. SID. https://sid.ir/paper/155971/en

Vancouver: Copy

ZEINALI E., SOLTANI A., GALESHI S., MOVAHEDI NAEINI S.A.R.. EVALUATING NITROGEN NUTRITION INDEX OF WHEAT (TRITICUM AESTIVUM L.) FIELDS IN GORGAN. JOURNAL OF PLANT PRODUCTION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2012;19(4):137-156. Available from: https://sid.ir/paper/155971/en

IEEE: Copy

E. ZEINALI, A. SOLTANI, S. GALESHI, and S.A.R. MOVAHEDI NAEINI, “EVALUATING NITROGEN NUTRITION INDEX OF WHEAT (TRITICUM AESTIVUM L.) FIELDS IN GORGAN,” JOURNAL OF PLANT PRODUCTION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 19, no. 4, pp. 137–156, 2012, [Online]. Available: https://sid.ir/paper/155971/en

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