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Changes in chemistry of rice husk compost and its effect on negative charge and nutriet content of a chemically degraded Oxisol

Rice husk application and its long-term effects on charge characteristics and elemental composition of a chemically degraded Oxisol have not been rigorously studied. The objective of the study was to determine the ability of composted rice husk (CRH) to preserve organic carbon (C), generate negative...

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Main Authors: Anda, Markus, Shamsuddin, J.
Format: Article
Language:English
Published: Taylor & Francis 2015
Online Access:http://psasir.upm.edu.my/id/eprint/44016/1/Changes%20in%20chemistry%20of%20rice%20husk%20compost%20and%20its%20effect%20on%20negative%20charge%20and%20nutriet%20content%20of%20a%20chemically%20degraded%20Oxisol.pdf
http://psasir.upm.edu.my/id/eprint/44016/
https://www.tandfonline.com/doi/full/10.1080/00103624.2015.1043455
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spelling my.upm.eprints.440162022-03-11T00:47:21Z http://psasir.upm.edu.my/id/eprint/44016/ Changes in chemistry of rice husk compost and its effect on negative charge and nutriet content of a chemically degraded Oxisol Anda, Markus Shamsuddin, J. Rice husk application and its long-term effects on charge characteristics and elemental composition of a chemically degraded Oxisol have not been rigorously studied. The objective of the study was to determine the ability of composted rice husk (CRH) to preserve organic carbon (C), generate negative charge, and release various ions in heavy clay Oxisol. The topsoil and subsoil, representing natural and erosion conditions, respectively, were incubated with CRH for 24 months. Results showed carbon types of CRH, as revealed by solid-state cross-polarization magic angle spinning 13C nuclear magnetic resonance (CP/MAS 13C NMR) spectroscopy, were relatively unchanged from months 5 to 12 after incubation, indicating limited decomposition. Carbon types were dominated by O-alkyl and di-O-alkyl C with small proportions of alkyl, methoxyl, aromatic, phenolic, and carboxyl C. After 24 months of incubation, O-alkyl and di-O-alkyl C decreased, indicating susceptibility, whereas alkyl, methoxyl, aromatic, and phenolic C increased, indicating resistance to decomposition. Values of pH0 and point zero net charge (PZNC) were measured using potentiometric titration and ion adsorption indices, respectively. Values of pH0 and PZNC decreased during CRH incubation for both topsoil and subsoil, suggesting the increase of soil negative charge. Total negative charge for topsoil and subsoil increased from 2.7 to 3.5 cmolc/kg and 2.5 to 3.2 cmolc/kg, respectively. This reflects that CRH was able to mask soil positive charge to increase negative charge. In situ soil solution study indicated CRH could release various elements in the order of potassium (K) > sulfur (S) > natrium (Na) > silicon (Si) > magnesium (Mg) > calcium (Ca). In addition, toxic elements, aluminum (Al) and manganese (Mn), were significantly suppressed. The implication of the study is that CRH offers a means to increase cation exchange capacity and nutrient content of highly weathered soils while preserving organic C, thereby reducing CO2 emission from agriculture. Taylor & Francis 2015 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/44016/1/Changes%20in%20chemistry%20of%20rice%20husk%20compost%20and%20its%20effect%20on%20negative%20charge%20and%20nutriet%20content%20of%20a%20chemically%20degraded%20Oxisol.pdf Anda, Markus and Shamsuddin, J. (2015) Changes in chemistry of rice husk compost and its effect on negative charge and nutriet content of a chemically degraded Oxisol. Communication in Soil Science and Plant Analysis, 46 (11). pp. 1419-1442. ISSN 0010-3624; ESSN:1532-2416 https://www.tandfonline.com/doi/full/10.1080/00103624.2015.1043455 10.1080/00103624.2015.1043455
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Rice husk application and its long-term effects on charge characteristics and elemental composition of a chemically degraded Oxisol have not been rigorously studied. The objective of the study was to determine the ability of composted rice husk (CRH) to preserve organic carbon (C), generate negative charge, and release various ions in heavy clay Oxisol. The topsoil and subsoil, representing natural and erosion conditions, respectively, were incubated with CRH for 24 months. Results showed carbon types of CRH, as revealed by solid-state cross-polarization magic angle spinning 13C nuclear magnetic resonance (CP/MAS 13C NMR) spectroscopy, were relatively unchanged from months 5 to 12 after incubation, indicating limited decomposition. Carbon types were dominated by O-alkyl and di-O-alkyl C with small proportions of alkyl, methoxyl, aromatic, phenolic, and carboxyl C. After 24 months of incubation, O-alkyl and di-O-alkyl C decreased, indicating susceptibility, whereas alkyl, methoxyl, aromatic, and phenolic C increased, indicating resistance to decomposition. Values of pH0 and point zero net charge (PZNC) were measured using potentiometric titration and ion adsorption indices, respectively. Values of pH0 and PZNC decreased during CRH incubation for both topsoil and subsoil, suggesting the increase of soil negative charge. Total negative charge for topsoil and subsoil increased from 2.7 to 3.5 cmolc/kg and 2.5 to 3.2 cmolc/kg, respectively. This reflects that CRH was able to mask soil positive charge to increase negative charge. In situ soil solution study indicated CRH could release various elements in the order of potassium (K) > sulfur (S) > natrium (Na) > silicon (Si) > magnesium (Mg) > calcium (Ca). In addition, toxic elements, aluminum (Al) and manganese (Mn), were significantly suppressed. The implication of the study is that CRH offers a means to increase cation exchange capacity and nutrient content of highly weathered soils while preserving organic C, thereby reducing CO2 emission from agriculture.
format Article
author Anda, Markus
Shamsuddin, J.
spellingShingle Anda, Markus
Shamsuddin, J.
Changes in chemistry of rice husk compost and its effect on negative charge and nutriet content of a chemically degraded Oxisol
author_facet Anda, Markus
Shamsuddin, J.
author_sort Anda, Markus
title Changes in chemistry of rice husk compost and its effect on negative charge and nutriet content of a chemically degraded Oxisol
title_short Changes in chemistry of rice husk compost and its effect on negative charge and nutriet content of a chemically degraded Oxisol
title_full Changes in chemistry of rice husk compost and its effect on negative charge and nutriet content of a chemically degraded Oxisol
title_fullStr Changes in chemistry of rice husk compost and its effect on negative charge and nutriet content of a chemically degraded Oxisol
title_full_unstemmed Changes in chemistry of rice husk compost and its effect on negative charge and nutriet content of a chemically degraded Oxisol
title_sort changes in chemistry of rice husk compost and its effect on negative charge and nutriet content of a chemically degraded oxisol
publisher Taylor & Francis
publishDate 2015
url http://psasir.upm.edu.my/id/eprint/44016/1/Changes%20in%20chemistry%20of%20rice%20husk%20compost%20and%20its%20effect%20on%20negative%20charge%20and%20nutriet%20content%20of%20a%20chemically%20degraded%20Oxisol.pdf
http://psasir.upm.edu.my/id/eprint/44016/
https://www.tandfonline.com/doi/full/10.1080/00103624.2015.1043455
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score 13.244413

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