Vol. 2, Issue 5 (2018)
Land-use controls the carbon footprint in terrestrial systems. Different land uses have different potentials for carbon sequestration due to differential SOC and aggregation dynamics. The study was conducted to investigate the impact of different agricultural land-use systems on soil carbon pools with the specific objective to study carbon sequestration and its distribution in soil organic carbon pools in soils of sub-montaneous districts of Punjab. Two sites were selected in ‘lower Shiwaliks foothills of Punjab locally known as Kandi area’ i.e Village Takarla, Tehsil Takarla, District Shaheed Bhagat Singh Nagar and Villages Rajwaal, Shri Pandyan and Chak Pandyan, Tehsil Mukerian, District Hoshiarpur. The results showed that Soil organic carbon (SOC) was more in forestry (5.00 g kg-1) in Takarla and at Mukerian, grassland possessed higher amount (15.88 g kg-1). Among the SOC fractions, the POC was most dominant but LC and HWC showed vulnerability to land use change. At Takarla, HWC (490 mg kg-1), LC (1626 mg kg-1), IC (7.00 mg kg-1) and total POC (3389 mg kg-1) were more in agro-forestry. At Mukerian, HWC (1370 mg kg-1), LC (1963 mg kg-1), IC (5.75 mg kg-1) and total POC (7991.6 mg kg-1) were more in grassland. Soil properties and physical, biological as well as functional pools of SOM are strongly influenced by different agricultural land-use. Soil C sequestration has numerous ancillary benefits. Carbon sequestration seems to be more in agro-forestry at Takarla and in grassland at Mukerian. Climatic conditions / temperature also influenced carbon fractions at both sites. At Mukerian, values for carbon fractions were high as compared to Takarla, due to comparatively low temperature which decreases the rate of decomposition of soil organic matter in Mukerian.
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