Abd El- Aziz, M., Abbas, M., Ewis, A. (2020). Can humic acid alleviate the adverse effect of elevated phosphorus application on yield and nutritive contents of maize grown on a calcareous soil?. Environment, Biodiversity and Soil Security, 4(Issue 2020), 333-343. doi: 10.21608/jenvbs.2020.48032.1112
Mohamed Abd El- Aziz; Mohamed H.H. Abbas; Ashraf Ewis. "Can humic acid alleviate the adverse effect of elevated phosphorus application on yield and nutritive contents of maize grown on a calcareous soil?". Environment, Biodiversity and Soil Security, 4, Issue 2020, 2020, 333-343. doi: 10.21608/jenvbs.2020.48032.1112
Abd El- Aziz, M., Abbas, M., Ewis, A. (2020). 'Can humic acid alleviate the adverse effect of elevated phosphorus application on yield and nutritive contents of maize grown on a calcareous soil?', Environment, Biodiversity and Soil Security, 4(Issue 2020), pp. 333-343. doi: 10.21608/jenvbs.2020.48032.1112
Abd El- Aziz, M., Abbas, M., Ewis, A. Can humic acid alleviate the adverse effect of elevated phosphorus application on yield and nutritive contents of maize grown on a calcareous soil?. Environment, Biodiversity and Soil Security, 2020; 4(Issue 2020): 333-343. doi: 10.21608/jenvbs.2020.48032.1112
Can humic acid alleviate the adverse effect of elevated phosphorus application on yield and nutritive contents of maize grown on a calcareous soil?
1Soil, Water and Environment Research Institute (SWERI),Agric.Research Center (ARC),Giza
2Soils and Water department, faculty of Agriculture, Benha University, Egypt
3Department of Soils and Water, Faculty of Technology and Development, Zagazig University, Egypt
Receive Date: 29 October 2020,
Revise Date: 11 November 2020,
Accept Date: 11 November 2020
Abstract
Growing maize in calcareous soils requires adequate supply of phosphorus inputs, yet excessive P-applications may affect negatively micronutrients availability in soil, including Zn. Thus, the current study evaluates the ability of humic acid (HA) to counteract the negative effect of applied P on Zn-uptake by maize plants. To achieve this aim, a field experiment was conducted in a calcareous soil (CaCO3 =268.91 g kg-1) following a split plot design to study the interactions between different P-inputs (100, 125 and 150% of the recommended dose, applied in main plots) and available-Zn in presence and absence of HA (applied in sub-plots at either 2 or 4 kg HA ha-1). Results revealed that increasing the level of P-application raised significantly P availability and consequently its uptake by maize plants; thus, enhanced significantly plant growth parameters and grain yield. In this concern, 125% of the recommended P-dose recorded the highest partial-factor-productivity values. Likewise, application of HA raised significantly available-P content and improved considerably plant growth and grain yield, especially with increasing the rate of its application. On the other hand, increasing the level of P-fertilizers decreased significantly Zn-availability and uptake by plants; however, in presence of HA, this effect was counteracted. Although, this amendment recorded no significant effect on soil-Zn availability; however, it raised significantly its content in shoots but not in grains. In conclusion, HA improved significantly productivity of maize grown on a calcareous soil. This amendment not only improved the partial factor productivity of P-fertilizer, but also increased Zn-uptake by maize plants.
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