Assessment of Carbon Pools and Stocks in an Inceptisol Under Long-Term Manuring and Fertilization in Rice-Wheat Cropping System: Comparison of Different Methods

The objective of the study was to assess the 32 years impact of long-term manuring and fertilization on soil organic C (SOC) pools and stocks under rice-wheat cropping system in an Inceptisol and compare different methods for estimation of labile and resistant SOC pools. The treatments included cont...

Full description

Saved in:
Bibliographic Details
Published in:Communications in Soil Science and Plant Analysis 2024-01, Vol.55 (2), p.230-242
Main Authors: Mourya, K. K., Purakayastha, T. J., Ahmed, N., Kumar, S., Trivedi, A., Husain, K., Ravisankar, N.
Format: Article
Language:English
Subjects:
Biological fertilization
Bulk density
Cereal crops
Compound fertilizers
Cropping systems
Fertilization
Fertilizers
FYM
green manure
Mineralization
Organic soils
Potassium permanganate
Rice
rice-wheat cropping system
SOC pools
SOC stock
Sodium hypochlorite
Soil analysis
Stocks
Wheat
Wheat straw
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The objective of the study was to assess the 32 years impact of long-term manuring and fertilization on soil organic C (SOC) pools and stocks under rice-wheat cropping system in an Inceptisol and compare different methods for estimation of labile and resistant SOC pools. The treatments included control (T1), 100% NPK- fertilizer (T2), 50% NPK + 50% N-FYM (T3), 75% NPK + 25% N-FYM (T4), 50% NPK + 50% N-wheat straw (WS) (T5), 75% NPK + 25% N-WS (T6), 50% NPK + 50% N-green manure (GM) (T7), and 75% NPK + 25% N-GM (T8). The soil samples were analyzed for SOC, oxidizable and resistant C by hot water (HWEC, HWRC), KMnO 4 (KMnO 4 -Cox, KMnO 4 -Cres), NaOCl (NaOClox, NaOCl-Cres), bulk density. As compared to 100% NPK, the SOC stocks (0-60 cm) in T3, T5, and T7 were increased by 10, 9.3, and 5.6%, respectively. The mean NaOCl-Cox, C mineralization (Cmin), HWEC, and KMnO 4 -Cox stocks contributed 37, 11, 6, and 4% of SOC stock. The correlation study showed that Cmin positively correlated with KMnO 4 -Cox, HWEC, and NaOClox. For assessing the mineralizable SOC pool, NaOCl-Cox overestimated, while HWEC and KMnO 4 -Cox underestimated it. Thus, these protocols need to be modified to match the Cmin data. However, NaOClox is recommended for assessing mineralizable SOC over 90 days of incubation.
ISSN:0010-3624
1532-2416
1532-4133
DOI:10.1080/00103624.2023.2265973