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Carbon Stocks in Different Soil Types under Diverse Rainfed Production Systems in Tropical India

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Title Carbon Stocks in Different Soil Types under Diverse Rainfed Production Systems in Tropical India
Carbon Stocks in Different Soil Types under Diverse Rainfed Production Systems in Tropical India
 
Creator ICAR_CRIDA
 
Subject Carbon sequestration, dryland cropping systems, India, inorganic carbon, organic carbon, total carbon stocks
 
Description Not Available
Soil carbon (C) pool plays a crucial role in the soil’s quality, availability of
plant nutrients, environmental functions, and global C cycle. Drylands generally
have poor fertility and little organic matter and hence are candidates for C
sequestration. Carbon storage in the soil profile not only improves fertility but also
abates global warming. Several soils, production, and management factors influence
C sequestration, and it is important to identify production and management factors
that enhance C sequestrations in dryland soils. The objective of the present study
was to examine C stocks at 21 sites under ongoing rainfed production systems and
management regimes over the last 25 years on dominant soil types, covering a range
of climatic conditions in India. Organic C stocks in the soil profiles across the
country showed wide variations and followed the order Vertisols . Inceptisols .
Alfisols . Aridisols. Inorganic C and total C stocks were larger in Vertisols than in
other soil types. Soil organic C stocks decreased with depth in the profile, whereas
inorganic C stocks increased with depth. Among the production systems, soybean-,
maize-, and groundnut-based systems showed greater organic C stocks than other
production systems. However, the greatest contribution of organic C to total C
stock was under upland rice system. Organic C stocks in the surface layer of the soils
increased with rainfall (r 5 0.59*), whereas inorganic C stocks in soils were found in
the regions with less than 550mm annual rainfall. Cation exchange capacity had
better correlation with organic C stocks than clay content in soils. Results suggest
that Indian dryland soils are low in organic C but have potential to sequester.
Further potential of tropical soils to sequester more C in soil could be harnessed by identifying appropriate production systems and management practices for
sustainable development and improved livelihoods in the tropics.
Not Available
 
Date 2020-02-25T05:53:30Z
2020-02-25T05:53:30Z
2009
 
Type Technical Report
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/32507
 
Language English
 
Relation Not Available;
 
Publisher C. Srinivasarao, B. Venkateswarlu, Sumanta Kundu