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IMPACT OF LONG TERM TILLAGE AND RESIDUE APPLICATION ON ORGANIC CARBON POOLS AND CARBON STOCK IN SEMI ARID TROPICAL ALFISOL OF HYDERABAD

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Title IMPACT OF LONG TERM TILLAGE AND RESIDUE APPLICATION ON ORGANIC CARBON POOLS AND CARBON STOCK IN SEMI ARID TROPICAL ALFISOL OF HYDERABAD
 
Creator D. SUMA CHANDRIKA, K .L. SHARMA, S. VIDYAVATHI2, MUNNALAL, K. USHA RANI AND T. SATISH KUMAR
 
Subject Conservation tillage, organic carbon pools, carbon stock, intercorrelations, relative yield
 
Description Not Available
long term experiment was conducted in rainfed semi-arid tropical Alfisol at Hayathnagar Research
Farm of Central Research Institute for Dryland Agriculture, Hyderabad, India, during the period 1995 to 2013 to
study the long-term impacts of tillage and residue application on carbon sequestration, C pools and C
Management Indices and their relationship with crop yield. The experiment was conducted in a split-split plot
design with conventional tillage (CT) and minimum tillage (MT) as main factors, surface application of sorghum
stover @ 2t ha-1 (SS), fresh gliricidia loppings @ 2t ha-1 (GL) and ‘no’ residue (NR) as sub factors and levels of
N viz., 0 (N0), 30 (N30), 60 (N60) and 90 (N90) kg N ha-1 as sub-sub factors in a castor-sorghum yearly rotation.
The results of the study clearly indicated that minimum tillage significantly increased the contents of soil C pools
viz., microbial biomass carbon, labile carbon and its fractions and particulate organic carbon compared to
conventional tillage. It was also observed that significant inter-correlations existed among the carbon pools
studied which indicated a dynamic equilibrium with each other. Of all the treatment combinations studied, the
practice of minimum tillage coupled with application of Gliricidia loppings @ 2t ha-1 and nitrogen applied @ 90 kg ha-1 (MTGLN90) was found to be the most promising in terms of maintaining significantly higher carbon
stock in semi arid tropical Alfisols.
Not Available
 
Date 2017-03-07T07:15:51Z
2017-03-07T07:15:51Z
2016-09-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/2830
 
Language English
 
Relation Not Available;
 
Publisher GKV