EFFECT OF DIFFERENT LEVELS OF NITROGEN, IRON AND ZINC ON PHYSIOLOGICAL INDICES AND FORAGE YIELD OF MAIZE (ZEA MAYS L.) IN MARKAZI PROVINCE

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SAJEDI N.A.; ARDAKANI M.R.

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Journal: Iranian Journal of Field Crops Research Year:2008 | Volume:6 | Issue:1 Page(s): 99-110

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Title

EFFECT OF DIFFERENT LEVELS OF NITROGEN, IRON AND ZINC ON PHYSIOLOGICAL INDICES AND FORAGE YIELD OF MAIZE (ZEA MAYS L.) IN MARKAZI PROVINCE

Author(s)

SAJEDI N.A. | ARDAKANI M.R. | Issue Writer Certificate

Keywords

N-FERTILIZERQ2

MICROELEMENTSQ3

PHYSIOLOGICAL INDICESQ3

TOTAL DRY WEIGHTQ3

Abstract

In order to investigate the effects of different levels of nitrogen, Iron and Zinc on PHYSIOLOGICAL INDICES and forage yield maize (Sc 704) a field experiment was conducted as a split plot in a randomized complete block design with 12 treatments and four replications at jihad Agricultural Research center of Markazi province in 2003. The treatments consisted of three levels of 150, 225 and 300 kg N ha-1 as main plots and MICROELEMENTS at four levels including control, 4 kg ha-1 Fe sulfate, 45 kg ha-1 Zn sulfat , 4 kg ha-1 Fe sulfate + 45 kg ha-1 Zn sulfate as sub plots. PHYSIOLOGICAL INDICES were affected by N rates. Rasing N levels from 150 to 225 and 300 kg N ha-1 increased leaf area index, crop growth rates and TOTAL DRY WEIGHT at 38 days after planting that after reproductive stage were significantly. A maximum LAI of 5.7 was observed during growth season after 1100 growing degree days at level of 300 kg N ha-1 ten day after tasseling the highest TDW equal 1600 g.m-2 was observed 14 days after silking with receiving 1150 GDD in 300kgN ha-1 . Among PHYSIOLOGICAL INDICES, the net assimilation rate was affected less by N application. Net assimilation rate declined during the growth season. The results also show that an application of MICROELEMENTS, particularly Zn, did not significantly increase LAI, CGR and TDW. Maximum LAI, CGR and TDW were obtained with the application of Zn Sulfate and Zn sulfate + Fe sulfate. Among nitrogen levels and MICROELEMENTS, maximum of forage yield equal 84.86 and 79.65 ton ha-1 obtained with the application of 300kgN ha-1 and 45 kg ha-1 Zn sulfate, respectively. The highest forage yield equal 88.66 ton ha-1 was obtained with application of 300kgN ha-1 + 45 kg ha-1 Zn sulfate. Considering the importance of LAI, CGR on foroge yield it was concluded that the magor increase in forage yield under high N and Zn sulfate was due to improvement of PHYSIOLOGICAL INDICES.

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APA: Copy

SAJEDI, N.A., & ARDAKANI, M.R.. (2008). EFFECT OF DIFFERENT LEVELS OF NITROGEN, IRON AND ZINC ON PHYSIOLOGICAL INDICES AND FORAGE YIELD OF MAIZE (ZEA MAYS L.) IN MARKAZI PROVINCE. IRANIAN JOURNAL OF FIELD CROPS RESEARCH, 6(1), 99-110. SID. https://sid.ir/paper/119118/en

Vancouver: Copy

SAJEDI N.A., ARDAKANI M.R.. EFFECT OF DIFFERENT LEVELS OF NITROGEN, IRON AND ZINC ON PHYSIOLOGICAL INDICES AND FORAGE YIELD OF MAIZE (ZEA MAYS L.) IN MARKAZI PROVINCE. IRANIAN JOURNAL OF FIELD CROPS RESEARCH[Internet]. 2008;6(1):99-110. Available from: https://sid.ir/paper/119118/en

IEEE: Copy

N.A. SAJEDI, and M.R. ARDAKANI, “EFFECT OF DIFFERENT LEVELS OF NITROGEN, IRON AND ZINC ON PHYSIOLOGICAL INDICES AND FORAGE YIELD OF MAIZE (ZEA MAYS L.) IN MARKAZI PROVINCE,” IRANIAN JOURNAL OF FIELD CROPS RESEARCH, vol. 6, no. 1, pp. 99–110, 2008, [Online]. Available: https://sid.ir/paper/119118/en

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