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Enhancing nitrogen availability from urea using clinoptilolite zeolite


Citation

Omar, Latifah and Ahmed, Osumanu Haruna and Abdul Majid, Nik Muhamad (2017) Enhancing nitrogen availability from urea using clinoptilolite zeolite. Geoderma, 306. pp. 152-159. ISSN 0016-7061; ESSN: 1872-6259

Abstract

The high costs of nitrogen fertilizers have necessitated best-developed practices to optimize nitrogen fertilizers use whilst minimizing nitrate losses. Ammonium adsorption inhibits loss of nitrogen in the form of nitrate thereby increasing nitrogen availability for crops. Due to the negatively charged properties of nitrate, it moves freely in the soil solution and not adsorbed onto soil particle surfaces. In this study, clinoptilolite zeolite was used in soil leaching and ammonium adsorption and desorption studies to determine: (i) soil total nitrogen availability, exchangeable ammonium, and available nitrate, and (ii) the capacity of clinoptilolite zeolite to adsorb and desorb ammonium from different rates of urea. Different rates of urea amended with clinoptilolite zeolite significantly reduced ammonium and nitrate release from urea compared with urea alone. Clinoptilolite zeolite enhanced retention of soil total nitrogen, exchangeable ammonium, and available nitrate due to the high cation exchange capacity of the mineral to adsorb ammonium, thus, improving nitrogen availability through temporary retention on the exchange sites of the clinoptilolite zeolite. The availability of nitrogen can be enhanced if urea is amended with clinoptilolite zeolite.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Agriculture and Food Sciences
Institute of Tropical Agriculture and Food Security
Institute of Tropical Forestry and Forest Products
DOI Number: https://doi.org/10.1016/j.geoderma.2017.07.012
Publisher: Elsevier
Keywords: Adsorption; Ammonium; Clinoptilolite zeolite; Desorption; Nitrogen; Nitrate
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 14 Jan 2019 01:23
Last Modified: 14 Jan 2019 01:23
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.geoderma.2017.07.012
URI: http://psasir.upm.edu.my/id/eprint/61735
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