EFFECT OF NITROGEN TOPDRESS FERTILIZER APPLICATION BY USING CHLOROPHYLL METER ON YIELD AND YIELD COMPONENTS OF POTATO (AGRIA CV.)

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ARSHADI M.J.; KHAZAEE H.R.; KAFI M.

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Journal: AGRICULTURAL RESEARCH Year:2008 | Volume:8 | Issue:1 (A) Page(s): 33-45

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Title

EFFECT OF NITROGEN TOPDRESS FERTILIZER APPLICATION BY USING CHLOROPHYLL METER ON YIELD AND YIELD COMPONENTS OF POTATO (AGRIA CV.)

Author(s)

ARSHADI M.J. | KHAZAEE H.R. | KAFI M. | Issue Writer Certificate

Keywords

NITROGEN FERTILIZERQ2

YIELD AND YIELD COMPONENTS OF POTATOQ2

CHLOROPHYLL METERQ3

NITROGEN INDEXQ2

Abstract

Among the essential elements for potao (Solanum tuberosum L.) crop growth, nitrogen has more important role in leaf area increment, shoots growth rate and tuber yield. Therefore, to determine the time and value of supplemental NITROGEN FERTILIZER in different stages of potato crop growth, it is required to use a reliable method to assess the uptakable nitrogen of soil during growing season. Therefore, in order to use CHLOROPHYLL METER to identify the required appropriate time of potato crop to NITROGEN FERTILIZER and increment of nitrogen use efficiency, an experiment was conducted based on randomized complete blocks design with three replications in research farm of Ferdowsi University, College of Agriculture. Nitrogen top dress fertilizer was applied in two levels of 100 and 150 kgN.ha-1 and in two NITROGEN INDEX of 90 and 95 percent. The results indicated that 95 percent NITROGEN INDEX versus 90 percent NITROGEN INDEX performs a better efficiency in increment of potato crop yield. However, in 95 percent index, NITROGEN FERTILIZER levels of 100 and 150 kgN.ha-1 did not showed significant difference in tuber yield. Nitrogen indices and NITROGEN FERTILIZER levels did not perform significant effect on number of main stems and number of tubers in plant. The percentages of medium and large tubers were increased when the NITROGEN FERTILIZER level was increased. Potato producers should apply NITROGEN FERTILIZER to improve their yield but in time and sufficient application of NITROGEN FERTILIZER requires an economic and fast procedure. It seems that application of NITROGEN FERTILIZER by using CHLOROPHYLL METER, in addition to make desirable yield of tuber, reduce the NITROGEN FERTILIZERs level.

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APA: Copy

ARSHADI, M.J., KHAZAEE, H.R., & KAFI, M.. (2008). EFFECT OF NITROGEN TOPDRESS FERTILIZER APPLICATION BY USING CHLOROPHYLL METER ON YIELD AND YIELD COMPONENTS OF POTATO (AGRIA CV.). AGRICULTURAL RESEARCH, 8(1 (A)), 33-45. SID. https://sid.ir/paper/84742/en

Vancouver: Copy

ARSHADI M.J., KHAZAEE H.R., KAFI M.. EFFECT OF NITROGEN TOPDRESS FERTILIZER APPLICATION BY USING CHLOROPHYLL METER ON YIELD AND YIELD COMPONENTS OF POTATO (AGRIA CV.). AGRICULTURAL RESEARCH[Internet]. 2008;8(1 (A)):33-45. Available from: https://sid.ir/paper/84742/en

IEEE: Copy

M.J. ARSHADI, H.R. KHAZAEE, and M. KAFI, “EFFECT OF NITROGEN TOPDRESS FERTILIZER APPLICATION BY USING CHLOROPHYLL METER ON YIELD AND YIELD COMPONENTS OF POTATO (AGRIA CV.),” AGRICULTURAL RESEARCH, vol. 8, no. 1 (A), pp. 33–45, 2008, [Online]. Available: https://sid.ir/paper/84742/en

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