Carbon storage potential and its distributions in the particle size fractions in Harran Plain, Turkey

İbrahim Halil Yanardag,Asuman Büyükkiliç Yanardağ,Angel Faz Cano,Ahmet Ruhi Mermut

doi:10.15832/ankutbd.907173

İbrahim Halil Yanardag, Asuman Büyükkiliç Yanardağ + Show 2 more

Open Access

https://doi.org/10.15832/ankutbd.907173

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Abstract

In recent years, there has been increasing international interest in increasing and sustainably managing soil C stocks to contribute to combating climate change and support food security. In this context, determining the C storage capacity of soils and examining the distribution of soil C based on fractions is of great importance for a better understanding of C dynamics. The present study investigated the storage potential of soil organic carbon (SOC), inorganic carbon (SIC) and total carbon (TC) in 16 selected profiles, and SOC and SIC distribution in five different particle size fractions (2000-425μm, 425-150 μm, 150-106 μm, 106-75 μm, <75 μm) of the Harran plain in Turkey. The results revealed that the particle size distribution in the surface layer varied in the following order depending on soil weight: 850-250> 2000-850> 250-150> 150-75> 75 μm. The organic C content of the soils is low due to the semi-arid climate conditions. Fraction-based soil SOC distribution was in the following order: 11% at 2000-850 μm, 15% at 850-250 μm, 21% at 250-150 μm, 23% at 150-75 μm and <75 μm 30%. Organic matter fractions differed according to the particle size distribution and the applicable soil management system. Stable organic matter content was significantly related to clay content and greatly influenced by the type of soil management used.

Highlights

Soil carbon (C) is the largest terrestrial carbon reserve and contains about 1.5 Eg of carbon, of which 0.68 Eg is organic carbon (Zhang et al 2020)
It means that the presence of CaCO3 in the soil might contribute to the stabilization of poorly crystallized Fe forms; this will contribute to soil organic carbon (SOC) retention, likely regarding triple Fe-Ca-SOC complexes (Sowers et al 2018)
Semiarid climate conditions affected organic matter with the high temperature and deficiency of organic material affected the accumulation of organic carbon in the soil

Summary

Introduction

Soil carbon (C) is the largest terrestrial carbon reserve and contains about 1.5 Eg (ie 1.5 × 1018 g) of carbon, of which 0.68 Eg is organic carbon (Zhang et al 2020). Soil organic matter (SOM) positively affects the physical, chemical and biological properties of the soil (Sakin & Yanardağ 2019). It is one of the most important components in the soil due to its capacity to affect plant growth and yield (Bongiovanni & Labartini 2006). In C stabilization processes, the structure of organic compounds in SOM, their true resistance to weathering and their interactions with the soil mineral fraction are closely related (Marinari et al 2010). The new origin of SOM is closely related to biological activity in the soil, while new and middleaged organic matter can contribute to the improvement of the physical structure of the soil (Wander 2004). Different soil types may react differently to the stabilization and sequestration of C (Yanardağ et al 2015)

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