ORIGINAL RESEARCH article
Front. Agron.
Sec. Plant-Soil Interactions
Volume 7 - 2025 | doi: 10.3389/fagro.2025.1562159
Effects of the Interaction between Dicarboxylic Acid Polymer and CaO on Phosphorus Use Efficiency of Cassava Grown on the Acidic Sulfate Soil in the Mekong Delta
Provisionally accepted
- 1Mekong University, Vinh Long, Vietnam
- 2Can Tho University, Can Tho, Vietnam
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Studies have reported that Dicarboxylic acid polymer (DCAP) -coated phosphorus fertilizer (DCAP/P) positively impacts crop growth and yield. However, studies on the effects of interaction between DCAP/P and CaO to improve the PUE of plants on acidic soils are limited. This study aimed to (i) examine the effects of lime and DCAP on improving P uptake and cassava growth on acid sulfate soil and (ii) evaluate the effects of interaction between lime and DCAP/P on cassava PUE. The experiment was conducted in the greenhouse of the School of Agriculture, Can Tho University, from December 2022 to August 2023. The pot experiment was arranged in a completely randomized split-plot design, with factor A comprising two liming doses (0 and 4 t CaO ha−1) and factor B comprising three phosphorus (P) fertilization treatments (0P, 60P, and DCAP/60P), each with four replications. The local cassava variety ‘O Ta Bang’ was use in the experiment. Our results showed that the total P uptake (g P2O5 plant−1) at 0P and 60P only reached 72 and 96%, respectively, compared with the total P uptake of DCAP/60P . Among the CaO-treated samples, 60P treatment increased the plant PUE to 28.6%, while DCAP/60P treatment significantly increased the PUE to 48.8%. The interaction between DCAP/60P and CaO synergistically enhanced PUE more efficiently than between 60P and CaO.
Keywords: Acid sulfate soil, CaO, cassava, DCAP, Phosphorus fertilizer
Received: 17 Jan 2025; Accepted: 23 May 2025.
Copyright: © 2025 Quyen, Ngoc, Thao and Ly. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Ngo Phuong Ngoc, Can Tho University, Can Tho, 10000, Vietnam
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