University of Khartoum

Effect of Inoculation and Nitrogen and Phosphorus Fertilization on Growth, Total Phenolic Content and Antioxidant Activity of Rosary Bean (Abrus precatorius var africanus)

Effect of Inoculation and Nitrogen and Phosphorus Fertilization on Growth, Total Phenolic Content and Antioxidant Activity of Rosary Bean (Abrus precatorius var africanus)

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Title: Effect of Inoculation and Nitrogen and Phosphorus Fertilization on Growth, Total Phenolic Content and Antioxidant Activity of Rosary Bean (Abrus precatorius var africanus)
Author: Idrees, Rayan Adnan ELtayeb ELShaikh
Abstract: A field experiment was conducted in the Demonstration Farm of the Department of Horticulture, Faculty of Agriculture at Shambat (Latitude 15° 40' N, Longitude 32° 32' E and Altitude 380 m above sea level) during the period from August 2015 to April 2016 to study the effect of inoculation and nitrogen and phosphorus fertilization on growth, total phenolic contents and antioxidant activity of Rosary bean(AbrusprecatoriusL.). The treatments comprised three levels of nitrogen: N0 (0 kg/ha), N1 (20 kg/ha), N2 (40 kg/ha) in the form of urea (46%N) and two levels of phosphorus: P0 (0 kg/ha), P1 (20 kg/ha) in the form of super phosphate (P2O5). The seeds were non inoculated (B0), inoculated with Rhizobium radiobacter (B1), and inoculated with Bacillus megateriumvar.phosphaticum (B2). The experiment was laid out in a split split plot design with three replications. The collected data were subjected to the analysis of variance using the Statistix software version 8.0. The nitrogen treatments were designated to the main plots, whereas the bio fertilizer treatments and phosphorus treatments were allotted to the subplots and sub-sub plots, respectively. Characters studied included plant height, number of branches per plant, number of leaves per plant, root length, fresh and dry weight of leaves, fresh and dry weight of branches, fresh and dry weight of root, number of seeds per plant, in addition to chemical analysis of leaves extract to determine the total phenolic contents and antioxidant activity (%) using DPPH radical scavenging assay method. The results revealed that there was no significant effect of nitrogen on the growth parameters except the fresh weight of roots. Phosphorus fertilization had a significant effect only on fresh and dry weight of leaves, whereas rhizobium and bacillus inoculation had no significant effect (P ≤ 0.5) on the growth parameters and chemical composition. Also, there were significant effects (P ≤ 0.5) of interaction between inoculation and phosphorus on fresh weight of roots, and interaction between nitrogen and phosphorus on root length and a highly significant effect (P ≤ 0.5) on fresh weight of leaves. Total phenolic contents and antioxidant activity of leaves extracts didn’t show any significant differences among different treatments. Thus, more research is needed to verify the results obtained.
URI: http://khartoumspace.uofk.edu/123456789/25918


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