MgO Fertilizer Sole and Combined with Organic and Inorganic Fertilizers: Effect on Soil Chemical Properties,Turmeric Performance, and Quality in a Tropical Alfisol

Adekiya, A.O and Alori, Elizabeth T. and Aboyeji, C.M and Dunsin, O and Adegbite, K. A. and Aremu, C. O. and Bamiro, O. M. and Ejue, Wutem S. and Okunlola, Faith O. and Adesola, Omowumi O. (2019) MgO Fertilizer Sole and Combined with Organic and Inorganic Fertilizers: Effect on Soil Chemical Properties,Turmeric Performance, and Quality in a Tropical Alfisol. The Scientific World Journal.

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Abstract

For soil fertility maintenance, secondary nutrient such as Magnesium (Mg) is always being neglected. However, its role is criticalin the growth, yield, and quality of crops. Therefore, two field experiments were initiated in 2017 and 2018 to evaluate the responseof soil chemical properties, performance, and qualities of turmeric (Curcuma longaL.) to Mg fertilizer alone and in combinationwith poultry manure (PM) and NPK 15-15-15 fertilizer (NPK). The treatments applied were the following: (i) PM alone at 8 t ha−1,(ii) NPK alone at 200 kg ha−1, (iii) Mg fertilizer alone (in form of MgO) at 20 kg ha−1,(iv)PMat8tha−1with MgO at 20 kgha−1(PM + Mg), (v) NPK at 200 kg ha−1with MgO at 20kgha−1(NPK + Mg), and (vi) control (no amendment of any kind).PM, NPK, and Mg fertilizers alone or NPK + Mg and PM + Mg increased soil chemical properties, performance (plant height,number of leaves, number of tillers, number of rhizomes, and fresh rhizome weight), and minerals and vitamins C and A contentsof turmeric rhizome compared with the control. By averaging 2017 and 2018, Mg fertilizer alone increased the yield of turmeric by10.8% compared with the control. For this experiment, NPK + Mg increased growth and yield of turmeric compared with othertreatments. Also, averaging 2017 and 2018, NPK + Mg increased rhizome yield of turmeric by 13.6% and 10.6% compared with PM+ Mg and NPK alone, respectively. Similarly, PM + Mg significantly improved mineral and vitamins contents compared with othertreatments. Therefore, for those that desire turmeric rhizome for its nutritive value, PM + Mg is recommended. For those that wantquantity, NPK + Mg is recommended

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