Corrigendum to “Effects of conventional and organic fertilization on spinach (Spinacia oleracea L.) growth, yield, vitamin C and nitrate concentration during two successive seasons” [Sci. Horticult. 126 (2010) 415–420]

In a pot experiment conducted in a phytotron, the effectiveness of foliar nutrition of spinach (Spinacia oleracea L.) with different magnesium salts with and without the addition of 0.5% CO(NH2)2 was studied. Magnesium was applied 3 times in the form of solutions of MgSO4 x 7H2O, Mg(NO3)2 x 6H2O, MgCl2 x 6H2O, C4H6O4Mg x 4H2O, compared to water as the control treatment. The obtained results showed that foliar feeding of spinach with inorganic magnesium salts was an efficient method for supplementing the Mg level in plants during the growing period. But the application of a metalo-organic complex in the form of magnesium acetate (C4H6O4Mg x 4H2O) at a concentration of 1.7%, in spite of a similar effect on leaf Mg content, induced phytotoxic symptoms in the form of chlorotic and necrotic spots on the leaves. The application of the solutions of inorganic magnesium salts had a significant effect, resulting in more intensive leaf gas exchange (stomatal conductance, transpiration and photosynthesis) and an increase in leaf yield. Magnesium sulphate affected the abovementioned processes in the most effective way, while magnesium acetate had a negative impact. Foliar feeding of spinach with the magnesium salts resulted in an increased leaf content of protein, chlorophyll, carotenoids, nitrates and proline, but a decrease in vitamin C content. The addition of urea to the applied magnesium salt solutions increased the plant gas exchange rates and the leaf content of protein, chlorophyll, carotenoids, nitrates and proline, but it decreased the content of vitamin C, potassium and magnesium.

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Impact of Propolis Extract as Foliar Spray On Growth, Yield and Some Chemical Composition of Spinach (Spinacia Oleracea L.) Plants Grown Under Calcareous Saline Soil

International Journal for Empirical Education and Research ◽

10.35935/edr/32.141 ◽

2019 ◽

pp. 1-14 ◽

Cited By ~ 1

Author(s):

Mohamed A. Seif El-Yazal

Keyword(s):

Chemical Composition ◽

Spinacia Oleracea ◽

Foliar Application ◽

Saline Soil ◽

Chemical Constituents ◽

Foliar Spray ◽

Growth Yield ◽

Soil Conditions ◽

Propolis Extract ◽

Spinacia Oleracea L

This experiment was suggested to study the beneficial effects of foliar application with propolis extract at the rates 0, 6000, 7000, 8000 and 9000 mg/L solution used as foliar application to spinach seedlings on growth, yield and some chemical constituents of spinach plants (Spinacia oleracea L.) grown under calcareous saline soil conditions. All experiments were achieved during the two successive seasons of 2016 and 2017. Results showed that increasing the rates of propolis extract as foliar application increased the growth parameters of the treated plants. The best result was obtained by the rate (8000 mg/L) as a foliar application in both seasons of the study. The same trend was also observed regarding all studied chemical constituents, i.e. chlorophyll a, b and total carotenoids concentration, anthocyanine, total carbohydrates, total and reducing sugars, total free amino acid, free proline, crude protein, total indoles, total phenols, N, P and K in leaves. Thus, the coincident application of propolis extract at (8000 mg/L) as foliar application ingredient is recommended for improving growth, yield and chemical composition of spinach plants and for overcoming the adverse effect of saline conditions.

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