Properties and Phosphate Fertilizer Function of Volcanic Ash Soil Type Adsorbent Adsorbing Phosphate from Secondary Effluent

The total amount of phosphorus in a volcanic ash soil type adsorbent adsorbing phosphate from secondary effluent (used volcanic ash soil type phosphate adsorbent) is 13.8gP · kg-1, mainly consisting of aluminum combination type phosphorus, and the amount of citrate-soluble phosphorus is 57%. A thoug...

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Veröffentlicht in:Journal of Japan Society on Water Environment 2006, Vol.29(4), pp.215-220
Hauptverfasser: JIANG, Yaozong, YANAGITA, Tomotaka, MITANI, Tomoyo, NONOYAMA, Yaya
Format: Artikel
Sprache:jpn
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Zusammenfassung:The total amount of phosphorus in a volcanic ash soil type adsorbent adsorbing phosphate from secondary effluent (used volcanic ash soil type phosphate adsorbent) is 13.8gP · kg-1, mainly consisting of aluminum combination type phosphorus, and the amount of citrate-soluble phosphorus is 57%. A though this used volcanic ash soil type phosphate adsorbent is not suitable as a phosphate fertilizer according to the Fertilizer Regulation Law, it is found suitable as a soil amendment matter with a phosphate supply function because of its high amount of citrate-soluble phosphorus. The soil physics of the subsoil of andosol seldom changes with the application of the used volcanic ash soil type phosphate adsorbent. However, this absorbent has a large effect of promoting the growth of Brassica campestris cv. Komatsu, and is more effective than superphosphate. Moreover, its phosphorus adsorption rate low at only 0.8%, which proves that it is very promising for soil reduction and recycling.
ISSN:0916-8958
1881-3690
DOI:10.2965/jswe.29.215