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Impact ofbio and mineral fertilizers on growth, yieldand its components of roselle plants (Hibiscus sabdariffa, L.)grown under different types of soil


Horticulture International Journal
Samir SI Ghabour,Saad A Mohamed,Sawsan A Saif El-Yazal,Hasan M.H. Moawad1

Abstract

A field experiment was carried out during the two successive seasons 2007 and 2008 to study the effect of bio fertilizers namely, Azotobacterine (Azotobacter chroococcum) and phosphorein (Bacillus polymyxa), mineral N, P and K fertilizers at the rates of 25, 50 and 100% for each fertilizer (from the doses recommended by Ministry of Agriculture) on growth (plant height, number of branches and herb fresh and dry weights/plant), yield (dry weight of sepales/plant and feddan and weight of seeds/plant and feddan) of roselle plants (Hibiscus sabdariffa, L.) under different soils (clay soil at Dar El-Ramad farm, sandy loam and saline loamy sand soil at Demo farm, Faculty of Agriculture) at El-Fayoum governorate conditions.The data obtained showed that, bio and mineral (NPK) fertilizers increased the above characters of roselle plants under different soils of experiment. The maximum increase of these characters was obtained by the treatment clay soil×100% NPK+bio fertilizers, followed by clay soil×50% NPK+bio fertilizers as compared to saline loamy sand soil×non fertilizer treatment, although, the differences between these treatments and mineral fertilizer at the rate of 100% NPK alone were insignificantly. Therefore, it is economically and environmentally recommended to inoculate roselle seeds with mixture of Azotobacter+Bacillus and fertilize these inoculated plants with 50% improve the vegetative growth and augment the yield components of roselle plants under clay soil were obtained the best results of this work study.

Keywords

roselle, hibiscus sabdariffa l, nitrogen, phosphorus, bio fertilization, soil type, salinity, growth, yield, physical characteristics, agricultural practices, morphological characteristics, potassium fertilizers, governorate conditions, experimental stations, solubilising microbes, chemical composition, mineral fertilizer, plant analysis

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