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. 2014 Jan;5(1):41-8.
doi: 10.1016/j.jare.2012.11.004. Epub 2013 Jan 12.

Bio-preparates support the productivity of potato plants grown under desert farming conditions of north Sinai: Five years of field trials

Mohammed T Abbas  1 , Mervat A Hamza  1 , Hanan H Youssef  1 , Gehan H Youssef  2 , Mohamed Fayez  1 , Mohamed Monib  1 , Nabil A Hegazi  1
Affiliations

Bio-preparates support the productivity of potato plants grown under desert farming conditions of north Sinai: Five years of field trials

Mohammed T Abbas et al. J Adv Res. 2014 Jan.

Abstract

Organic agriculture as well as good agricultural practices (GAPs) intrigues the concern of both consumers and producers of agricultural commodities. Bio-preparates of various rhizospheric microorganisms (RMOs) are potential sources of biological inputs supporting plant nutrition and health. The response of open-field potatoes to the application of RMO bio-preparates, the biofertilizer "Biofertile" and the bioagent "Biocontrol", were experimented over 5 successive years under N-hunger of north Sinai desert soils. Both vegetative and tuber yields of a number of tested cultivars were significantly improved due to rhizobacterial treatments. In the majority of cases, the biofertilizer "Biofertile" did successfully supply ca. 50% of plant N requirements, as the yield of full N-fertilized plants was comparable to those received 50% N simultaneously with bio-preparates treatment. The magnitude of inoculation was cultivar-dependent; cvs. Valor and Oceania were among the most responsive ones. Bio-preparate introduction to the plant-soil system was successful via soaking of tubers and/or spraying the plant canopy. The "Biocontrol" formulation was supportive in controlling plant pathogens and significantly increased the fruit yields. The cumulative effect of both bio-preparates resulted in tuber yield increases of ca. 25% over control.

Keywords: Biocontrol; Biofertilizers; North Sinai; Organic farming; Potatoes; Rhizospheric microorganisms.

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Figures

Fig. 1
Fig. 1
Interaction of mode of application of bio-preparates with both tuber harvest (A) and total fresh shoot biomass (B) of the cultivar Spunta. Results represent data of the first season (2006/2007).
Fig. 2
Fig. 2
Population of culturable rhizobacteria in the root spheres (rhizosphere soil, ecto- and endo-rhizospheres) as well as phyllosphere, as affected by various treatments of potato plants (tuber soaking and/or spraying phylloplanes). Results represent data of the first season and the cultivar Spunta (2006/2007).
Fig. 3
Fig. 3
Effect of biofertilization on potato tuber harvest (kg/40 plants) for the cultivar “Valor” during the two successive seasons 2008/2009 and 2009/2010.
Fig. 4
Fig. 4
Combined statistical analysis of tuber harvest data obtained during the four consecutive seasons (2006/2010) of field experimentations. (A) Season effect, (B) biofertilization effect and (C) cultivar effect.
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