Caspersen, Siri and Bergstrand, Karl-Johan
(2020).
Phosphorus restriction influences P efficiency and ornamental quality of poinsettia and chrysanthemum.
Scientia Horticulturae. 267
, 109316
, 2-10
[Journal article]
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Available under License Creative Commons Attribution Non-commercial No Derivatives. 775kB |
Abstract
Better synchronization of plant-available phosphorus (P) with crop P requirement is required to reduce P losses to the environment and to improve resource-efficiency of the exploitation of non-renewable phosphate rock. In horticultural plant production, a restricted availability of P may limit stem length and improve compactness, which are desirable characters for many ornamental plants. In the present study, we investigated the effect of reduced availability of P on plant quality, biomass production and phosphorus efficiency of poinsettia (Euphorbia pulcherrima cv. 'Mira Red') and chrysanthemum (Chrysanthemum x morifolium cv. 'Breeze Cassis'). Five P concentrations (6, 12, 18, 24 or 48 mg L-1)were applied as starter Pin the peat-based potting substrate as well as in the nutrient solution given during the experiment. Stem length of both plant species was strongly restricted at 6 mg P L-1 but was not significantly affected by higher P levels. For poinsettia, the optimum bract diameter was obtained at 18 mg P L-1. For maximum shoot dry biomass, branching and plant diameter, however, 24 mg L-1 was needed. Optimal plant diameter and shoot biomass of chrysanthemum was obtained at 18 mg P L-1 while 24 mg L-1 was required for maximum flower number. Increasing the P supply to 48 mg L-1 did not improve shoot dry matter, branching or flowering of either species, but induced luxury uptake of P. Total shoot P uptake increased linearly over the P fertilizer range tested. For optimal plant biomass combined with optimal ornamental quality, shoot P concentrations at 90 DAP was in the range of 0.30-0.35 % for poinsettia and 0.25-0.30 % for chrysanthemum. Chrysanthemum showed a higher phosphorus efficiency than poinsettia at low P levels, mainly related to a higher internal P utilization efficiency. The P acquisition efficiency was in the range of 55-60 0 /0 for both species, and was not significantly affected by the total amount of P applied. In conclusion, with the P fertilization strategy used, P restriction could not be used for plant height restriction of poinsettia "Mira Red" or chrysanthemum "Breeze Cassis" without negative effects on plant quality. However, P fertilization could be markedly reduced without negative effects on plant growth and development, improving phosphorus efficiency and recovery.
Authors/Creators: | Caspersen, Siri and Bergstrand, Karl-Johan | ||||||
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Title: | Phosphorus restriction influences P efficiency and ornamental quality of poinsettia and chrysanthemum | ||||||
Series Name/Journal: | Scientia Horticulturae | ||||||
Year of publishing : | 2020 | ||||||
Volume: | 267 | ||||||
Article number: | 109316 | ||||||
Number of Pages: | 10 | ||||||
Publisher: | Elsevier | ||||||
Associated Programs and Other Stakeholders: | Z - SLU - Libray > Odla mera | ||||||
ISSN: | 0304-4238 | ||||||
Language: | English | ||||||
Publication Type: | Journal article | ||||||
Article category: | Scientific peer reviewed | ||||||
Version: | Published version | ||||||
Copyright: | Creative Commons: Attribution-Noncommercial-No Derivative Works 4.0 | ||||||
Full Text Status: | Public | ||||||
Subjects: | (A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Horticulture | ||||||
Keywords: | Alternative growth regulation, Phosphorus acquisition efficiency (PAE), Phosphorus recovery, Phosphorus uptake efficiency, Phosphorus utilization efficiency (PUE) | ||||||
URN:NBN: | urn:nbn:se:slu:epsilon-p-105361 | ||||||
Permanent URL: | http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-105361 | ||||||
Additional ID: |
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ID Code: | 16947 | ||||||
Faculty: | LTV - Fakulteten för landskapsarkitektur, trädgårds- och växtproduktionsvetenskap | ||||||
Department: | (LTJ, LTV) > Department of Biosystems and Technology (from 130101) | ||||||
Deposited By: | SLUpub Connector | ||||||
Deposited On: | 26 May 2020 13:23 | ||||||
Metadata Last Modified: | 15 Jan 2021 19:19 |
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