Effect of Four Land Uses on Soil Edaphic Properties and Soil Organic Carbon Stock in Mizoram, North-East India
DOI:
https://doi.org/10.36808/if/2019/v145i12/150635Keywords:
Land Use Types, Soil Physico-Chemical Properties, Soil Depth, Soil Organic Carbon Stock.Abstract
The present study was aimed at assessing the effect of four land uses namely dense forest, open forest, grassland and pine plantation on soil edaphic properties and soil organic carbon in Lawngtlai district of Mizoram, northeast India. A permanent plot of 250 × 250 m was demarcated in each land use and soils were collected randomly from four points at depth 0-20 cm, 20-40 cm and 40-100 cm within the plot. Bulk density, soil texture, soil moisture content and soil pH were estimated. Bulk density was lower in dense forest as compared to the other three land uses and increased with increasing depth. Soil moisture content and pH were found to be highest in dense forest. All the land uses were grouped under sandy textural class. The highest mean SOC concentration (%) for the entire soil depth (0-100 cm) was found in dense forest and the least in open forest with 4.06% and 1.88% respectively. All the land use types followed a pattern of SOC concentration decreasing with increasing depth. The highest mean SOC stock for the entire depth was recorded in dense forest with 88.66 Mg C ha-1 and least in pine plantation with 49.16 Mg C ha-1. SOC stock in 0-40 cm in all the land uses accounts for more than 50% of the total SOC stock up to 1 m soil depth. The estimated highest SOC stock loss was observed when dense forest is converted to pine plantation (39.5 Mg C ha-1) followed by dense forest to open forest (39.15 Mg C ha-1) and dense forest to grassland (20.07 Mg C ha-1).References
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