Variability in soil organic carbon pools in different land use systems in the north-eastern region of India

SUNITA  YADAV; MANDIRA  BARMAN; K M  MANJAIAH; T J  PURAKAYASTHA; PLABANI  ROY; R K  YADAV; MD  YEASIN; SEEMA

doi:10.56093/ijas.v94i10.151357

Authors

SUNITA YADAV ICAR-Indian Agricultural Research Institute, New Delhi
MANDIRA BARMAN ICAR-Indian Agricultural Research Institute, New Delhi
K M MANJAIAH ICAR-Indian Agricultural Research Institute, New Delhi
T J PURAKAYASTHA ICAR-Indian Agricultural Research Institute, New Delhi
PLABANI ROY Central Silk Board-Central Sericultural Research and Training Institute, Pampore, Jammu and Kashmir
R K YADAV Agriculture Research Station Ummedganj, Kota, Rajasthan
MD YEASIN ICAR-Indian Agricultural Statistics Research Institute, New Delhi
SEEMA College of Agriculture (Agriculture University, Jodhpur), Jodhpur, Rajasthan

https://doi.org/10.56093/ijas.v94i10.151357

Keywords:

Active and passive carbon, Carbon management index, Carbon pools, Lability index, Land use systems

Abstract

The current study was carried out during 2020 to 2022, at Horticulture Research Centre (HRC), Nagicherra, Agartala, Tripura to assess and compare the effects of various land use systems, including bamboo, tea, mango, lemon, rice-rice, wheat-millet, okra-onion and uncultivated soils, on soil organic carbon (SOC) dynamics. SOC is a critical component of terrestrial ecosystems, influencing soil health, fertility and carbon sequestration potential. The NEH region of India, Tripura characterized by its diverse agro-ecological zones and land use systems (LUS), presents a unique opportunity to investigate the various land use regimes' effects on SOC pools. Walkley and Black carbon (WBC) significantly vary among the selected LUS, ranging from 7.14–12.48 g/kg, with the maximum values in tea LUS. In 0–30 cm depth, very labile C (CVL) pools are very variable among the selected LUS (2.04–5.35 g/kg), which is the highest in tea and mango compared to the uncultivated system. The C pools in selected LUS indicated the deviation depth and land use pattern. Lability index (LI) varies from 1.50–1.63 and 1.40–1.74 in 0–30 cm and 30–60 cm depth, respectively. Carbon pool index (CPI) assessed highest in tea LUS, 1.78 and 2.1 from 0–30 and 30–60 cm, respectively. Carbon management index (CMI) was higher in selected LUS compared to uncultivated system.

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References

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