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Organic carbon forms in Alfisol profile after Twenty Years of Cropping, Fertilization, Groundnut Shells and Farm Yard Manure Addition under Arid Conditions

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Relation http://oar.icrisat.org/3894/
 
Title Organic carbon forms in Alfisol profile after Twenty Years of Cropping, Fertilization, Groundnut Shells and Farm Yard Manure Addition under Arid Conditions
 
Creator Srinivasa Rao, Ch
Wani, S P
Venkateswarlu, B
Vittal, K P R
Vijayasankarbabu, M
Yellamanda Reddy, T
Kundu, S
 
Subject Groundnut
Agriculture-Farming, Production, Technology, Economics
 
Description The objectives of this study were to examine ;he effects of 20 years of groundnut cropping with
chemical fertilization (NPK), organic manuring (FYM or groundnut shells) and integrated use of these two
inputs (INM) on crop yields, soil organic carbon (SOC), particulate organic carbon (POC) and microbial
biomass carbon (MBC) in an Alfisol under arid conditions. VariollS nutrient managcment options
significantly «0.05) improved yield of groundnut pod over 20 years. The SOC improved significantly in
surface layer (0-20 cm) from 0.31 % in control to 0.59 % in 50 % NPK + 4 t FYM ha". With 50 % NPK + 4
t groundnut shells ha" also the SOC improved markedly to 0.49 %. Interestingly, with integrated nutrient
use, improvements in SOC were observed even up to 60 em depth of the profile. Overall, there was a buildup
of SOC in surface layers in all treatments. Profile mean POC increased from 0,09 % in control to 0.20 % in
50 % NPK + 4 t FYM ha'!. Microbial biomass carbon (MBC) improved from 31.5-54,9 !-lg g'! soil in control
to 39.5 -135,5 !-lg g'! soil with 50 % NPK + 4 t FYM ha", whereas the highest MBC/OC ratio was found in
50 % NPK + 4 t groundnut shells ho".
 
Date 2007
 
Type Conference or Workshop Item
NonPeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/3894/1/Organic_Carbon_forms_CHSR_SPW.pdf
Srinivasa Rao, Ch and Wani, S P and Venkateswarlu, B and Vittal, K P R and Vijayasankarbabu, M and Yellamanda Reddy, T and Kundu, S (2007) Organic carbon forms in Alfisol profile after Twenty Years of Cropping, Fertilization, Groundnut Shells and Farm Yard Manure Addition under Arid Conditions. In: Proceedings of International Symposium on Organic Matter Dynamics in Agro-Ecosystems., 16th to 19th July 2007, Poitiers, France.