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Alternative means of recycling pineapple leaf residues

Published online by Cambridge University Press:  15 January 2003

Osumanu H. Ahmed ,
Ahmad M.H. Husni ,
Rahin A. Anuar  and
Mohamed M. Hanafi
Osumanu H. Ahmed
Affiliation:
Department of Land Management, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia
Ahmad M.H. Husni
Affiliation:
Department of Land Management, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia
Rahin A. Anuar
Affiliation:
Department of Land Management, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia
Mohamed M. Hanafi
Affiliation:
Department of Land Management, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia
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Abstract

Introduction. One of the challenges of the Malaysian pineapple industry is to develop new techniques for managing pineapple residues. A study was carried out to investi- gate whether K-humate can be produced from these residues. Materials and methods. Pineapple leaves were air-dried, shredded and chipped. Some of the shredded leaves were incinerated at 500 °C. Potassium hydroxide (KOH) was extracted by dissolving the ash obtai- ned in distilled water for 24 h at a ratio of 1:7 (ash / water) after which the sample was filte- red. After this extraction of KOH from the ashes of pineapple leaf residues, the remaining ash residues were further analyzed to assess the total and soluble K contents. Moreover, a given quantity of shredded leaf residues was mixed with chicken dung (as a source of microorga- nisms and nitrogen) and chicken feed. The mixture was composted with standard procedu- res. Humic acids were reconstituted using KOH from pineapple leaves with K from ash residues and K from composted pineapple leaves. Results and discussion. By reconstituting humic acids with KOH, a K-humate was produced with approximately 34.5% of its K readily soluble in water. A reconstitution of humic acids with K from ash residues produced a K-humate with approximately 3.34% of its K readily soluble in water. Conclusion. The K-humate produced from the reconstitution of humic acids with K from KOH can be used in fertigation programmes as a source of K while the K-humate produced through the reconsti- tution of humic acids with K from ash residues can be used as a source of K for fresh water fishes.

Keywords

MalaysiaAnanas comosuscrop residuesleavescompostspotassium hydroxidepotassiumhumic acidsMalaisieAnanas comosusrésidu de récoltefeuillecomposthydroxyde de potassiumpotassiumacide humique
Type
Research Article
Information
Fruits , Volume 58 , Issue 1 , January 2003 , pp. 53 - 60
Copyright
© CIRAD, EDP Sciences

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