Response of tomato plant to ammonium and nitrate nutrition using the relative addition rate technique
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- Acta Horticulturae 1315 - cover - colophon - contents - authors
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Different N sources (NO3-, NH4+, or NH4NO3) at relative addition rate (RAR) of 0.25 day-1 were supplied to tomato (Lycopersicom esculentum Mill.), a species sensitive to NH4+ toxicity. At RAR 0.25 day-1 growth reduction occurred by NH4+ application, slightly. Tomato roots had a more efficient NH4+ assimilation than shoots when N was supplied solely in the form of NH4+, and dominant amino acids in tomato were glutamine and asparagine. Low tissue levels of calcium and magnesium in the NH4+-fed plants constituted part of the NH4+-toxicity syndrome. The supply of NO3- led to the accumulation of Fe in tomato roots, but leaves Fe concentration in NO3--fed plants was low in comparison to NH4+ supply. It is concluded that due to the high sensitivity of tomato to NH4+, even at RAR 0.25 day-1 the relative addition rate technique was not able to reduce the deleterious effects of NH4+ in tomato plants.
Original language | English |
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Journal | Acta Horticulturae |
Volume | 1315 |
Pages (from-to) | 495-501 |
Number of pages | 7 |
ISSN | 0567-7572 |
DOIs | |
Publication status | Published - 2021 |
Event | I International Conference and X National Horticultural Science Congress of Iran - Tehran, Iran, Islamic Republic of Duration: 4 Sep 2017 → 7 Sep 2017 Conference number: 1 |
Conference
Conference | I International Conference and X National Horticultural Science Congress of Iran |
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Number | 1 |
Country | Iran, Islamic Republic of |
City | Tehran |
Period | 04/09/2017 → 07/09/2017 |
Bibliographical note
Publisher Copyright:
© 2021 International Society for Horticultural Science. All rights reserved.
- Amino acid, Ammonium, Lycopersicon esculentum, Nitrate, Relative addition rate technique
Research areas
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