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. 2019 Jul 30;14(7):e0219969.
doi: 10.1371/journal.pone.0219969. eCollection 2019.

Active and passive soil organic carbon pools as affected by different land use types in Mizoram, Northeast India

Uttam Kumar Sahoo  1 , Soibam Lanabir Singh  1   2 , Anudip Gogoi  1 , Alice Kenye  1 , Snehasudha S Sahoo  3
Affiliations

Active and passive soil organic carbon pools as affected by different land use types in Mizoram, Northeast India

Uttam Kumar Sahoo et al. PLoS One. .

Abstract

Soil organic carbon plays an important role in the stability and fertility of soil and is influenced by different management practice. We quantified active and passive carbon pools from total soil organic carbon (TOC) in seven different land use systems of northeast India. TOC was highest (2.75%) in natural forest and lowest in grassland (1.31%) and it decreased with increasing depth in different pools of lability. Very Labile Carbon (VLC) fraction ranged from 36.11 to 42.74% of TOC across different land use system. Active carbon (AC) pool was highest in Wet Rice Cultivation (61.64%) and lowest (58.71%) in natural forest. Higher AC pools (VLC and less labile) in most land use systems barring natural forests suggest that the land use systems in the region are vulnerable to land use change and must adopt suitable management practice to harness carbon sequestration.

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Conflict of interest statement

The authors have declared that no competing interests exist.

Figures

Fig 1
Fig 1. Distribution of active and passive soil carbon at three soil depths in different land use systems.
Fig 2
Fig 2. Distribution of soil organic carbon fractions of different lability (% of total organic carbon) in different land use types (0–45 cm soil depth) in Mizoram.
(Letters a, b, c describe whether the proportions of different carbon fractions are significantly different or not, where proportions with same letters indicate no significance (p<0.05), within and across the land use types under study).
Fig 3
Fig 3. Soil organic carbon stock (Mg C ha-1) at different soil depth in different land use types in Mizoram.
Fig 4
Fig 4. Total organic carbon stock (Mg C ha-1) in different land use types (0–45 cm soil depth) in Mizoram.
Fig 5
Fig 5. Litter inputs in different land use systems.
(Different letters a, b, c indicate significant difference (p<0.05) between the different land use types under study).
See this image and copyright information in PMC

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