Comparison Between Walkley-Black and Loss On Ignition Methods for Organic Matter Estimation in Different Moroccan Soils

• Autorzy: El Mouridi Zineb , Ziri Rabea , Douaik Ahmed , Bennani Sahar , Lembaid Ibtissame , Bouharou Loubna , Brhadda Najiba , Moussadek Rachid

Identyfikatory

DOI

10.12912/27197050/163121

• Języki publikacji: EN

Abstrakty

EN

The present study aims to compare two different methods for the determination of soil organic matter (SOM); the wet acidified dichromate oxidation methods Walkley-Black (WB) and the combustion’s one (mass loss on ignition – LOI); in order to find out the best one in terms of suitability, environmentally-friendly, time-efficiency and economical benefit. Forty-five Moroccan soil samples (El Guich, Koudia and Merchouche area) from 0–20 cm depth with different classes, textures and organic matter contents were evaluated. According to the results, a strong linear relationship was observed between LOI-OM and WB-OM methods for all the sites. However, El Guich and Koudia recorded much larger regression coefficients (0.745*** and 0.611*** respectively) compared to Merchouche site (0.452**). Therefore, the SOM by walkley-Black method can be easily calculated from the LOI method at 500±25 ºC for 2 hours using linear equation in order to minimize the analysis time and consumption of chemicals for routine laboratory. In addition, it was noticed that the SOM contents calculated by the LOI method are higher in Merchouche soils compared to that of WB due to the presence of a large amount of clay minerals in the Merchouche soils (43.9 < %clay < 56.1) in comparison with those of El Guich (5 < %clay < 7.5) and Koudia (16.1 < %clay < 20.4). This study revealed that both methods were reliable but W.B method was more accurate and suitable for calcareous soils and those with high clay contents. However, LOI method is an accurate and beneficial for non-calcareous soils with low clay content.

Słowa kluczowe

EN

clay mineralogy; mass loss; ignition; non-calcareous soil; soil organic matter; Walkley-Black method

• Wydawca: Lubelski Oddział Polskiego Towarzystwo Inżynierii Ekologicznej ; Lublin University of Technology ; WNGB Wydawnictwo Naukowe
• Czasopismo: Ecological Engineering & Environmental Technology
• Rocznik: 2023
• Tom: Vol. 24, iss. 4
• Strony: 253--259
• Opis fizyczny: Bibliogr. 28 poz., rys., tab.

Twórcy

autor

El Mouridi Zineb

• National Institute of Agricultural Research (INRA), BP 6356, CRRA Rabat, Av. Al Irfane, 10100 Rabat, Morocco
• Ibn Tofail University, Faculty of Sciences, Plant and Animal Productions and Agro-Industry Laboratory, Department of Biology, PO Box 133, Kénitra, Morocco

• https://orcid.org/0000-0002-1222-4429

autor

Ziri Rabea

• Ibn Tofail University, Faculty of Sciences, Plant and Animal Productions and Agro-Industry Laboratory, Department of Biology, PO Box 133, Kénitra, Morocco

• https://orcid.org/0000-0002-5223-8235

autor

Douaik Ahmed

• National Institute of Agricultural Research (INRA), BP 6356, CRRA Rabat, Av. Al Irfane, 10100 Rabat, Morocco

• https://orcid.org/0000-0001-7374-4674

autor

Bennani Sahar

• National Institute of Agricultural Research (INRA), BP 6356, CRRA Rabat, Av. Al Irfane, 10100 Rabat, Morocco

• https://orcid.org/0000-0001-9046-9651

autor

Lembaid Ibtissame

• National Institute of Agricultural Research (INRA), BP 6356, CRRA Rabat, Av. Al Irfane, 10100 Rabat, Morocco

• https://orcid.org/0000-0002-7971-6241

autor

Bouharou Loubna

• Ibn Tofail University, Faculty of Sciences, Geoscience Laboratory, Department of Geology, PO Box 133, Kénitra, Morocco

• https://orcid.org/0000-0002-4996-2345

autor

Brhadda Najiba

• Ibn Tofail University, Faculty of Sciences, Plant and Animal Productions and Agro-Industry Laboratory, Department of Biology, PO Box 133, Kénitra, Morocco

• https://orcid.org/0000-0003-1994-0310

autor

Moussadek Rachid

• National Institute of Agricultural Research (INRA), BP 6356, CRRA Rabat, Av. Al Irfane, 10100 Rabat, Morocco
• International Center for Agricultural Research in the Dry Areas (ICARDA), North-Africa Platform, BP: 6443, Rabat Institutes, Av. Al Irfane, 10100 Rabat, Morocco

• https://orcid.org/0000-0001-8037-9054

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).