EFFECT OF DIFFERENT LEVELS OF NITROGEN ON GROWTH AND DEVELOPMENT OF CORN ROOT

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MIRNIA S.G.; MODARES SANAVI S.A.M.; PIRI T.

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Journal: Iranian Journal of Soil Research Year:2001 | Volume:15 | Issue:1 Page(s): 39-56

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Title

EFFECT OF DIFFERENT LEVELS OF NITROGEN ON GROWTH AND DEVELOPMENT OF CORN ROOT

Author(s)

MIRNIA S.G. | MODARES SANAVI S.A.M. | PIRI T. | Issue Writer Certificate

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Abstract

The grow1h and development of roots play an important role in uptake of nitrogen and other nutrients. Concern about nitrogen pollution of groundwater has stimulated interest in minimizing fertilizer N application and has encouraged research in corn genotypes with high N use efficiency and uptake. This experiment was conducted in 1998 at Tarbiat Moddanes University's farm with corn variety 704. The experimental design was a split plot with randomized complete block design in which 3 plant grow1h stages (8-9 leaves, silking, and black layer formation) were randomized to the main plots and six levels of nitrogen(O,46, 92, 138, 184 and 230 Kg/ha) were in sub plots. The experiment was conducted in 4 replicates. The experimental design for analyzing grain yield data was complete block design. Grain yield was Measured after black layer was formed in grain. Wet and dry weight of root and stem, root length, ratio of root dry matter to stem and root density measured at three plant growth stages. The results showed that different levels of nitrogen fertilizer, plant growth stages and their interactions in all measured traits were significant at 1% level. From three plant growth stages and nitrogen treatments, silking time and N138 had the maximum wet and dry root weight respectively. Mean Root length and density at silking stage were more than other stages. The mentioned traits increased rapidly after planting, but decreased at black layer formation stage. With increasing fertilizer application, root length and density increased, but not linearly Stem fresh weight was more at black layer formation stage than other stages, whereas dry stem weight and ratio of dry root to stem were the highest at silking. The N138 treatment produced the highest wet and dry stem weight Higher or lower applications decreased stem weight Therefore, nitrogen fertilizer can help corn develop deep roots and increase root density at the beginning of the growing season. If nitrogen fertilizer is used in optimum level, the growth of root will be stimulated. Otherwise, root growth will be limited.

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APA: Copy

MIRNIA, S.G., MODARES SANAVI, S.A.M., & PIRI, T.. (2001). EFFECT OF DIFFERENT LEVELS OF NITROGEN ON GROWTH AND DEVELOPMENT OF CORN ROOT. IRANIAN JOURNAL OF SOIL AND WATERS SCIENCES, 15(1), 39-56. SID. https://sid.ir/paper/15937/en

Vancouver: Copy

MIRNIA S.G., MODARES SANAVI S.A.M., PIRI T.. EFFECT OF DIFFERENT LEVELS OF NITROGEN ON GROWTH AND DEVELOPMENT OF CORN ROOT. IRANIAN JOURNAL OF SOIL AND WATERS SCIENCES[Internet]. 2001;15(1):39-56. Available from: https://sid.ir/paper/15937/en

IEEE: Copy

S.G. MIRNIA, S.A.M. MODARES SANAVI, and T. PIRI, “EFFECT OF DIFFERENT LEVELS OF NITROGEN ON GROWTH AND DEVELOPMENT OF CORN ROOT,” IRANIAN JOURNAL OF SOIL AND WATERS SCIENCES, vol. 15, no. 1, pp. 39–56, 2001, [Online]. Available: https://sid.ir/paper/15937/en

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