Dr Ashim Datta1, Dr Nirmalendu Basak1, Dr Anil Chinchmalatpure1, Dr Rakesh Banyal1
1Icar-central Soil Salinity Research Institute, Karnal, India
Land use change is the second important factor contributing significantly to climate change after fossil fuel burning. Globally considerable area is saline land hampering normal crop growth. We studied eight land-uses namely forest trees including Frass (Tamarix articulata) and Eucalytus (Eucalyptus tereticornis); agroforestry systems involving Prosopis alba-mustard (Brassica juncea) system; and fruit tree such as Kaith (Feronia limonia) plantation; and fruit tree-based agroforestry systems such as Karonda (Carrisa carandas)-barley (initial two years)/mustard (later on)-cluster bean (Cyamopsis tetragonoloba) system, Aonla (Emblica officinalis) –barley/mustard-cluster bean system, Bael (Aegle marmelos) – barley/mustard-cluster bean system, and Grassland (composed of Cenchris ciliaris, C. setigerus, Brachiaria reptans, Dactyloctenium aegyptium, D. sindicum, Panicum miliare, Cynodon dactylon, etc. established naturally after protection) systems located at the Bir Reserved forest, Hisar (latitude 29° 10’ N, longitude 75° 44’E, altitude 220m msl), in Haryana State, India to evaluate changes in oxidizable organic carbon (SOC) and inorganic carbon (SIC) content in the soil profile. Results showed that highest SOC stock in the soil profile was observed under Frass (77.7 Mg C ha-1) followed by Eucalyptus (69.2 Mg C ha-1), and Aonla (61.2 Mg C ha-1). Soil profiles of Bael (32.9 Mg C ha-1) and grassland (50.2 Mg C ha-1) stored lowest SOC stock among the land uses studied. Similar amount of higher SIC stock was observed in the soil profiles of Kainth (263 Mg C ha-1), Bael (247 Mg C ha-1) and Prosopis-mustard system (231 Mg C ha-1). Lowest SIC was observed in grassland (65 Mg ha-1) followed by Frass (88 Mg ha-1) whereas Eucalyptus (115 Mg ha-1), Aonla (131 Mg ha-1) and Karonda-mustard (121 Mg ha-1) recorded similar amounts of inorganic carbon stock in the soil profiles. Types of land use significantly influence SOC and SIC contents and need to be considered while formulating their reclamation management strategies.
Dr. Ashim Datta is working as a Soil Scientist at ICAR-Central Soil Salinity Research Institute, Karnal, Haryana, India. He deals with the topic on land use influence on soil organic and inorganic carbon distribution deep down the soil profile. He has expertise on SOC management on rice-wheat cropping system. He also studies the influence of climate smart agricultural practices on SOC enrichment in North West India.