Dynamics of organic carbon in deep soils under rice and non-rice cropping systems
Article Type
Research Article
Publication Title
Geoderma Regional
Abstract
Subsoil might be a possible sink of stable C in some regions of India, which itself has low soil C storage. Further, knowledge of subsoil C chemistry under submerged rice ecology is required as rice is one of the major staple cereals in India and waterlogging influences SOC characteristics. This study investigated the dynamics of organic C in surface and deep subsoil layers under rice and non-rice ecology in eastern India. Outcomes revealed less organic C in deep subsoils (x− 5.35 Mg ha− 1), but with higher residence time as evidenced by a higher mean recalcitrant index (20.2) and lower mean lability index (1.86). Further, deep rice soils exhibited higher C sequestration potential than deep non-rice soils resulting from curbed microbial biomass and their activities. Summarily, deep rice soil exhibited the potential for C sequestration, displaying a synergistic effect from deep soil and submerged rice ecology.
First Page
388
Last Page
394
DOI
10.1016/j.geodrs.2016.11.004
Publication Date
12-1-2016
Recommended Citation
Deb, Shovik; Chakraborty, Somsubhra; Weindorf, David C.; Murmu, Arjun; Banik, Pabitra; Debnath, Manoj Kanti; and Choudhury, Ashok, "Dynamics of organic carbon in deep soils under rice and non-rice cropping systems" (2016). Journal Articles. 4175.
https://digitalcommons.isical.ac.in/journal-articles/4175