Determining critical soil pH for phosphorus uptake efficiency in an acidic Ultisol for maize | ||
| Egyptian Journal of Soil Science | ||
| Volume 64, Issue 4, December 2024, Pages 1525-1536 PDF (360.63 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejss.2024.308115.1827 | ||
| Authors | ||
| M. Abdulaha-Al Baquy* 1; Jiu-yu Li2; Jackson Nkoh Nkoh3; Md. Romel Biswash2; Ren-Kou Xu2 | ||
| 1Department of Soil Science, Faculty of Agriculture, Hajee Mohammad Danesh Science and Technology University, Dinajpur, 5200, Bangladesh | ||
| 2State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, P. O. Box 821, Nanjing, China | ||
| 3Shenzhen Key Laboratory of Marine Bioresource and Eco-Environmental Science, Guangdong Provincial Key Laboratory for Plant Epigenetics, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China | ||
| Abstract | ||
| The scarcity of phosphorus (P) restricts crop growth due to reduced P uptake in acidic soil. Due to significant variations in soil pH in acidic Ultisol, it is still unclear how such variations would affect P uptake efficiency by maize plants. Thus, under different pH (3.75, 4.0, 4.5, 5.0 and 5.5) conditions, this study investigated the growth and P uptake efficiency during the growth of maize plants as influenced by the distribution of P species in Ultisols. Our results showed that increased soil acidity had a negative impact on plant height, dry matter yield (shoots and roots biomass), and chlorophyll content of maize plants. Also, the P uptake efficiency increased with decreased soil acidity, and the critical value for P uptake efficiency was pH 5.00. Generally, as soil pH was increased, soil available P decreased significantly and was consistent with higher uptake of available P by the plant and variations in different P species including those bound to iron, aluminum, and calcium. | ||
| Keywords | ||
| Acidification; Phosphorus speciation; Chlorophyll; Plant biomass; Nutrient availability | ||
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