Distribution Analysis of Soil Organic Carbon Fractions across Different Soil Textures in Panipat District

Abstract:

This study investigated the distribution of soil organic carbon (SOC) fractions across different soil textures in the Panipat district of Haryana, India. A total of 250 soil samples from five blocks were analyzed for SOC fractions viz. Very Labile Carbon (VLC), Labile Carbon (LC), Less Labile Carbon (LLC), and Recalcitrant Carbon (RC). Soil textures were classified as sandy loam, loamy sand, loam, and clay loam, with clay loam being the dominant texture. The results indicate that finer-textured soils, such as clay loam, have higher proportions of stable carbon fractions (LLC and RC), contributing to long-term carbon sequestration and soil structural stability. Conversely, sandy loam soils exhibited higher labile carbon fractions (VLC and LC), reflecting a more dynamic organic matter turnover. The overall organic carbon content was predominantly medium, influenced by the semi-arid climate and the prevalent rice-wheat cropping system. The spatial variability of soil texture across blocks significantly affected the SOC fraction distribution, underscoring the need for texture-specific soil management practices. Recommendations include enhancing organic inputs and minimizing decomposition in sandy soils, while preserving the soil structure in clay loam soils to maintain carbon stability. This study provides critical insights into sustainable soil fertility management and carbon sequestration strategies in semi-arid agroecosystems.