Quantity-Intensity Relation of Potassium in Soils of Selected Land-uses in the Humid Rainforest Agroecology, Southeastern, Nigeria
Application of Q/I concept constitutes a viable approach for the estimation of soil K status and crop K requirements. Soil samples were collected from the 0-15 and 15-30 cm depths of oil palm, cassava, plantain and sycamore land-uses in the humid rainforest agroecology, Southeastern Nigeria and a...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Bulgarian Soil Science Society
2023-06-01
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| Series: | Bulgarian Journal of Soil Science |
| Subjects: | |
| Online Access: | https://www.bsss.bg/issues/Issue1_2023/BJSS_2023_1_5.pdf |
| Summary: | Application of Q/I concept constitutes a viable approach for the estimation of soil K status
and crop K requirements. Soil samples were collected from the 0-15 and 15-30 cm depths of oil
palm, cassava, plantain and sycamore land-uses in the humid rainforest agroecology, Southeastern
Nigeria and analyzed for K forms and Q/I parameters. Data generated for the K forms and the Q/I
parameters were subjected to ANOVA and means separated using LSD at 5% probability level.
Also, the K forms were correlated with soil properties and K Q/I parameters and equally amongst
themselves using correlation analysis. Potassium forms significantly (LSD 0.05) decreased as total
> structural > available > exchangeable > non-exchangeable > solution K. The K Q/I parameters
varied significantly (LSD0.05) according to land-uses and soil depths and ranged between 1.16-2.03
Mol L-1/2 x 10-3 (ARe
ok), 9.25-17.75cmol kg-1 (KL), 3.63-6.13cmol kg-1(Ko), 5.63-12.25cmol kg-1
(Kx), 6.37-9.81cmolkg-1(mol L-1)
-1/2 (PBCok), 26.14-53.96 cmol kg-1(mol L-1)
-1/2(Kpot), 0.82-
1.83Lmol-1)
-1/2 (KG), 328.32-1562.82 KJ mol-1(-∆G) and 0.14-0.50% (Ksat). Whereas the intercorrelation of K forms was significant (P < 0.05), the correlation between K Q/I parameters with
most K forms and soil properties and between K forms with most soil properties were distinct. The
Q/I concept could be useful for understanding of transformation of K in soil and the prediction of K
fertilizer for sustained crop performance. |
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| ISSN: | 2534-8787 2367-9212 |