| Autor: |
Osumanu H. Ahmed, Husni M. H. Ahmad, Hanafi M. Musa, Anuar A. Rahim, Syed Omar S. Rastan |
| Jazyk: |
angličtina |
| Rok vydání: |
2005 |
| Předmět: |
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| Zdroj: |
The Scientific World Journal, Vol 5, Pp 42-49 (2005) |
| Druh dokumentu: |
article |
| ISSN: |
1537-744X |
| DOI: |
10.1100/tsw.2005.9 |
| Popis: |
In Malaysia, pineapples are grown on peat soils, but most K fertilizer recommendations do not take into account K loss through leaching. The objective of this study was to determine applied K use efficiency under a conventionally recommended fertilization regime in pineapple cultivation with residues removal. Results showed that K recovery from applied K fertilizer in pineapple cultivation on tropical peat soil was low, estimated at 28%. At a depth of 0–10 cm, there was a sharp decrease of soil total K, exchangeable K, and soil solution K days after planting (DAP) for plots with K fertilizer. This decline continued until the end of the study. Soil total, exchangeable, and solution K at the end of the study were generally lower than prior values before the study. There was no significant accumulation of K at depths of 10–25 and 25–45 cm. However, K concentrations throughout the study period were generally lower or equal to their initial status in the soil indicating leaching of the applied K and partly explained the low K recovery. Potassium losses through leaching in pineapple cultivation on tropical peat soils need to be considered in fertilizer recommendations for efficient recovery of applied K. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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