Phosphorus and Micronutrient Interactions in soil and their Impacts on Maize Growth | ||||
| Egyptian Journal of Soil Science | ||||
| Article 12, Volume 63, Issue 3, September 2023, Page 405-416 PDF (599.06 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejss.2023.220182.1610 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Ihab Mohamed Farid1; Reham El-Shinawy2; Omar Elhussiny2; Hassan Abbas 3; Mohamed H.H. Abbas  4; Mohamed Ahmed Bassouny 5
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| 1Soils and water department, Agriculture Faculty, Benha University | ||||
| 2Soils and Water Department, Faculty of Agriculture, Benha University | ||||
| 3Benha University, Faculty of Agriculture | ||||
| 4Benha University, Faculty of Agriculture, Soils and Water department | ||||
| 5Department of Soil and Water, Faculty of Agriculture, Benha University, Egypt | ||||
| Abstract | ||||
| Iteractions among phosphorus (P) and micronutrients may greatly influence plant growth and soil productivity. Thus, a greenhouse investigation of a complete randomized design was conducted to highlight such interactions in which a clayey soil (enriched with either 5 mg Fe kg-1 soil , 1mg Mn kg-1 soil ,or 1.5 mg Zn kg-1 soil) received P in the form of calcium superphosphate at three rates equivalent to 6.7 (P1), 13.4 (P2, recommended dose) and 20.1 mg P kg-1 (P3). Then, the soil was planted with maize seeds (Zea mays L var f16) for 60 days. Our results showed that application of P3, but not P2, raised significantly the fraction of P in soil which was extracted by ammonium bicarbonate- diethylene Tri amine penta acetic acid (AB-DTPA- P) versus P1. Likewise, AB-DTPA extractable Fe and Mn increased significantly in soil with increasing the rate of applied P, while AB-DTPA extractable-Zn decreased. In P-Fe interaction experiment, increasing the dose of applied P enhanced significantly maize dry weights, although did not affect significantly their heights. This is because P applications led to significant increases in Fe and K contents within plant tissues. Regarding P-Mn interactions, application of P2 significantly raised Mn content within plants while the highest application rate of P (P3) diminished this content. In spite of that, maize dry weights seemed to be comparable between P2and P3 and both exhibited higher dry weights than P1. Finally, results of P-Zn interactions revealed that both N and Zn contents significantly increased within plants due to increasing the rate of applied P fertilizer. Accordingly, plant dry weights increased significantly. In conclusion, plants that received the recommended doses of P or even less need to absorb more micronutrient (Fe, Mn and Zn) from soil for metabolism and growth; yet, high P inputs increased the uptake of Fe and Zn by plants while diminished Mn uptake. | ||||
| Keywords | ||||
| Fe; Zn; Mn; micronutrient availability; micronutrient uptake; interactions; maize | ||||
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