Shreen S. Ahmed ; Mona K. M. Abdel-Razek ; Wafaa A. Hafez ; Gehan H. Abd EL Aziz( 2017). Environmental Impacts of some Organic Extracts on Sugar Beet Yield under Saline-Sodic Soil ConditionsJ.Soil Sci. and Agric. Eng., Mansoura Univ., Vol. 8 (12): 821 - 827, 2017
Abstract: The objective of this study is to evaluate the effects of different organic extracts (natural or synthetic) as stimulator substances on sugar beet yield and soil properties. Two field experiments were carried out during two successive seasons (2016 and 2017) in a private farm at Port-Said site, Egypt. Tomato and banana peels were used as natural organic extracts while citric acid and malic acid were used as synthetic organic extracts. Natural and synthetic extracts were applied to soil. The results showed that either synthetic or natural organic extract individual or combined led to significant increases in root and sugar yields/fed. The highest values of sugar yields were obtained using synthetic organic extracts application followed by natural organic extracts. The results revealed also that, natural peel extracts showed a significant increase in the sucrose% comparing with the synthetic organic acids. Sucrose% reached 22% for both peels extracts while it reached 17% for both organic acids treatments. The application of synthetic or natural organic extract improved nutritional values of sugar beet plant. There was excellent potential to obtain a purity% of sugar using natural peel extracts. Applying the combination of banana extract and citric acid showed the maximum reduction in soil salinity (18.5%), whereas applying Tomato extract individually showed the minimum reduction of soil salinity (7.9%) compared to control. The Soil pH decreased insignificantly in case of treatments relative to the control. Moreover, applying these extracts led to a decrease in both sodium and potassium cations content of the soil under this study. Adding organic extract (natural or synthetic) led to a pronounced decrease in both SAR and ESP values as compared with the control. So, these extracts can be used for reducing soil salinity and improve the long term productivity of this soil for sustainable agriculture.
Keywords: (sugar beets, salt affected soil, salinity, organic extract, citric acid, maleic acid)
