Nitrogen and Phosphorus Rates Influence Growth,  Flowering,  and Nutrient Uptake in Iris germanica ‘Immortality’

Xiaojie Zhao; Guihong Bi; Tongyin Li; Richard L. Harkess; Eugene K. Blythe

doi:10.7235/HORT.20210064

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2021 Vol.39, Issue 6 Preview Page Next Page

Research Article

Nitrogen and Phosphorus Rates Influence Growth, Flowering, and Nutrient Uptake in Iris germanica ‘Immortality’

31 December 2021. pp. 726-737

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Abstract

In this study, the influence of nitrogen (N) and phosphorus (P) rates on plant growth, flowering, and uptake of essential nutrients was evaluated in container-grown tall bearded (TB) iris (Iris germanica) ‘Immortality’. Factorial combinations of three N (5, 10, or 15 mM) rates and three P (5, 10, or 15 mM) rates were applied to plants via fertigation twice per week from March to September 2013. Plant height, leaf SPAD reading, and flowering data were collected during the growing season. Plants were harvested in December 2013 to measure dry weight (DW) and analyze concentrations of essential mineral elements. Greater N rates had positive effects on plant height, leaf SPAD reading, flowering performance, and uptake of several essential elements, such as potassium (K), calcium (Ca), and iron (Fe). Phosphorous rate did not significantly affect most of the growth parameters. Greater P rates increased P concentration in leaves and roots and decreased boron (B) concentration in leaves but did not significantly influence net uptake of other nutrients except copper (Cu). The average N:P ratio ranged from 4.7 to 7.5, 2.4 to 4.0, and 6.0 to 8.7 in leaves, roots, and rhizomes, respectively.

Keywords

different tissues

mineral elements

N:P ratio

potassium

SPAD reading

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Information

Publisher :KOREAN SOCIETY FOR HORTICULTURAL SCIENCE
Publisher(Ko) :원예과학기술지
Journal Title :Horticultural Science and Technology
Journal Title(Ko) :원예과학기술지
Volume : 39
No :6
Pages :726-737
Received Date : 2021-04-19
Revised Date : 2021-06-21
Accepted Date : 2021-07-13
DOI :https://doi.org/10.7235/HORT.20210064

Horticultural Science and Technology ISSN:1226-8763(Print) 2465-8588(Online) 원예과학기술지

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