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Impact of carbon inputs on soil carbon fractionation, sequestration and biological responses under major nutrient management practices for rice-wheat cropping system

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Title Impact of carbon inputs on soil carbon fractionation, sequestration and biological responses under major nutrient management practices for rice-wheat cropping system
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Creator Ajay Kumar Bhardwaj
Deepika Rajwar
Uttam Kumar Mandal
Sharif Ahmad
Bhumija Kaphaliya
Paramjit Singh Minhas
Mathyam Prabhakar
Rakesh Banyal
Ranbir Singh
Suresh kumar Chaudhari
Parbodh Chander Sharma
 
Subject Not Available
 
Description Not Available
Major nutrient management systems for rice-wheat cropping were compared for their potential to
credit organic carbon (C) to the soil, its fractionation into active (very labile, VLc; labile, Lc) and passive
(less labile, LLc; non-labile, NLc) pools, and crop yield responses. A ten-year long experiment was used
to study effects of: (i) no inputs (Control, O), (ii) 100% inorganic fertilizers (F) compared to reduced
fertilizers inputs (55%) supplemented with biomass incorporation from (iii) opportunity legume crop
(Vigna radiata) (Le), (iv) green manure (Sesbania aculeata) (GM), (v) farmyard manure (FYM), (vi) wheat
stubble (Ws), and (vii) rice stubble (Rs). Maximum C input to soil (as the percentage of C assimilated in
the system) was in GM (36%) followed by RS (34%), WS (33%), LE (24%), and FYM (21%) compared to
O (15%) and F (15%). Total C input to soil had a direct effect on soil C stock, soil C fractions (maximum in
VLc and LLc), yet the responses in terms of biological yield were controlled by the quality of the biomass
(C:N ratio, decomposition, etc.) incorporated. Legume-based biomass inputs accrued most benefits for
soil C sequestration and biological productivity
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Date 2019-10-15T07:01:02Z
2019-10-15T07:01:02Z
2019-06-24
 
Type Article
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/23392
 
Language English
 
Relation Not Available;
 
Publisher Scientific Reports