International Journal of Agricultural Policy and Research
Vol.3 (1), pp 1-28, January 2015
Available online at https://www.journalissues.org/IJAPR/
Article 15/ID/JPR194/28/ pages
Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 4.0 International License.
Original Research Article
Leaf performance analysis of four radish (Raphanus sativus L. var. sativus) cultivars grown in controlled cabinets under varying temperatures and irrigation levels
Caser G. Abdel
SG. Um IFGPAG, Leibniz Universität, Hannover, Germany.
Author’s Email: caser.abdel(at)yahoo.com
Topsi, Famox F1, Corox F1 and Altox F1 radish cultivars were grown in controlled 20 and 12°C cabinets and they were subjected to 0, 33, 66 and 100% depletion of peat moss available water capacity (AWC). The objective of this experiment was to determine the performances of leaf growths of four radish cultivars in response to varying temperatures and irrigation levels. The obtained results showed that radish grown in 20°C cabinet substantially exceeded that of 12°C in plant leaves dry weight (13.13%), leaf area index (34.1%), leaf number (7.6%) and mid blade length (13.6%). On the other hand, 12°C showed superiority over 20°C in plant leaves fresh weight and leaves thickness by 12.1 and 33.6%, respectively. Additionally, slower leaf generation rates of radish grown in 12°C cabinet, as compared to that grown in 20°C. Plant leaf area of Topsi, Famox F1, Corox F1 and Altox F1 irrigated by 0% AWC depletion substantially surpassed their corresponding plant leaf area irrigated by 100%AWC depletion by 40.03, 43.87, 80.12 and 115.79%, respectively. Radish cultivars can be ordered according to their superiorities as follows: Altox F1 > Corox F1 > Famox F1 > Topsi. Radish leaves were affected more by irrigation levels than temperatures. However, 12°C substantially ameliorated the drought adversities; the lowest values of all detected parameters were for radish grown in 20°C cabinet which showed signs of wilting. Topsi preferred higher temperature and showed susceptibility at 12°C in contrast to other cultivars, particularly Altox F1 which performed well at 12°C. Cultivars can be placed according to their drought resistance in the following order: Altox F1>Famox F1>Corox F1> Topsi.
Key words: Radish, cultivars, temperature, irrigation, leaves.