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Phosphorus Sorption Characteristics of Acidic Luvisols and Nitisols under Varying Lime Rates, and Response Validation Using Wheat.
- Source :
- Communications in Soil Science & Plant Analysis; 2022, Vol. 53 Issue 17, p2196-2215, 20p
- Publication Year :
- 2022
-
Abstract
- This study investigated phosphorous (P) sorption characteristics under lime rates, and validated them under field conditions. Soil samples from nitisols and luvisols were taken, mixed with lime(tha<superscript>−1</superscript>) at[0,0], [5.25, 3.75], [10.5, 7.5] and [15.75, 11.25], respectively, and incubated for 30 days. It was equilibrated with KH<subscript>2</subscript>PO<subscript>4</subscript> at 0, 10, 20, 30, 40, and 50 mgPL<superscript>−1</superscript>. The data were tested with Freundlich and Langmuir models. External P requirement (EPR) and changes in chemical properties were evaluated. The field validation on wheat involved rates of P (0, 8.2, 16.4, 24.6, 32.9, and 41.1 kg ha<superscript>−1</superscript>) and lime (0, 650, and 1300 kgha<superscript>−1</superscript>) in a randomized complete block design with three replications. Freundlich was found the best-fitted model. Freundlich coefficient (Kf) ranged from 212 to 45 mgPkg<superscript>−1</superscript> (nitisols) whereas it was 112.7 to 16.29 mgPkg<superscript>−1</superscript> (luvisols). EPR (kgPha<superscript>−1</superscript>) without and the highest lime rate were: nitisols (142.5 and 52.32 kgPha<superscript>−1</superscript>) and luvisols (124.84 and 25.94 kgPha<superscript>−1</superscript>). Liming reduced EPR by 63.3% (nitisols) and 79.3% (luvisols). Liming increased soil pH from [4.55 to 6.60 in the nitisols, and 5.33 to 6.51 in luvisols]; exchangeable acidity (cmol(+)kg<superscript>−1</superscript>) 3.84 to 0.01 nitisols, and 0.72–0.05 luvisols, and available P (mg/kg) 3.2–6.32 nitisol, and 2.74–8.72 luvisols. Furthermore, applying 32.9 kgPha<superscript>−1</superscript> x 1300 kgha<superscript>−1</superscript> lime resulted in grain yield (4345.2 kgha<superscript>−1</superscript>) that was 449% more than the untreated crop (791.3 kgha<superscript>−1</superscript>). The validation result suggested higher P than blanket P recommendation. It also justifies that excess P or lime alone cannot be a complete solution for P management and increased yield. [ABSTRACT FROM AUTHOR]
- Subjects :
- LIMING of soils
SORPTION
CHEMICAL properties
PHOSPHORUS
SOIL acidity
Subjects
Details
- Language :
- English
- ISSN :
- 00103624
- Volume :
- 53
- Issue :
- 17
- Database :
- Complementary Index
- Journal :
- Communications in Soil Science & Plant Analysis
- Publication Type :
- Academic Journal
- Accession number :
- 158288154
- Full Text :
- https://doi.org/10.1080/00103624.2022.2070637