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Carbon stocks in major soil types and land use systems in semi arid tropical region of southern India

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Title Carbon stocks in major soil types and land use systems in semi arid tropical region of southern India
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Creator Venkanna, K., Mandal, U.K., Raju, A.J.S., Sharma, K.L., Adake, R.V., Pushpanjali, Reddy, B.S., Masane, R.N., Venkatravamma, K., and Pedababu, B.
 
Subject Carbon sequestration, forest soils, land-use systems, organic carbon, soil types, total carbon stocks
 
Description Not Available
We study here the soil organic and inorganic carbon stock under different land-use systems in semiarid tropical region of India, as carbon storage in the soil profile not only improves fertility but also abates global warming. Soil samples were collected up to
60 cm depth from 51 profiles, one from each Mandal in Warangal District, Andhra Pradesh, representing semiarid tropical region of India. Vertisols and associated
soils contained greater C stocks, followed by Inceptisols less than Alfisols. The soil organic carbon (SOC) stocks (CN analyser C-inorganic C) ranged from 22.68 to 94.83 Mg ha–1 with a mean of 52.84 Mg ha–1 in Alfisols; 34.37 to 73.67 Mg ha–1 with a
mean of 51.26 Mg ha–1 in Inceptisols, and 27.80 to 74.20 Mg ha–1 with a mean of 49.33 Mg ha–1 in case of Vertisols, whereas soil inorganic carbon (SIC) stock was 12.4 Mg ha–1 in Alfisols, 17.5 Mg ha–1 in Inceptisols and 22.9 Mg ha–1 in Vertisols and associated soils. Among the different land-use systems, total C stock was highest in forest soils followed by fodder system, paddy, maize, cotton, redgram, intercrop, chilli, permanent fallow and lowest in castor system. Soil nitrogen also followed similar trend as SOC stock. A surface map of soil C stock and soil N was prepared for Warangal District using kriging interpolation techniques and total C stock was estimated to 0.088 Pg out of which SOC stock was 77% and SIC stock was 23% for the District. Significant correlation (P < 0.05) was obtained between SOC stock and soil nitrogen with Mandal-wise annual rainfall (r = 0.436 for SOC stock and 0.410 for total soil N). As wet oxidation procedure, i.e. Walkey–Black method is a routine and most popular procedure for estimating SOC, a relationship was developed between Walkley–Black carbon
as well as SOC estimated through dry combustion method using CN analyser. It was found that Walkley– Black carbon recovered 90% of SOC for semiarid tropical soils.
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Date 2018-09-20T08:45:55Z
2018-09-20T08:45:55Z
2014-11-01
 
Type Journal
 
Identifier 18
0011-3891
http://krishi.icar.gov.in/jspui/handle/123456789/7115
 
Language English
 
Relation Not Available;
 
Publisher Current Science Association with Indian Academy of Sciences