Abstract
Studying the dynamics of soil organic carbon (SOC) is important for understanding the mechanistic pathways of C stabilization into different SOC pools.An attempt was, therefore, made to assess the impact of double rice cropping system with different levels of fertilizers and in combination with organics on C sequestration and its stabilization in an Inceptisol using a 14-year old experiment at Jagtial under semi-arid climate in India.Total organic carbon (TOC) allocated into different pools in order of very labile > less labile > non labile > labile, constituting about 41.4, 20.6, 19.3 and 18.7%, respectively.In comparison with control, system receiving farmyard manure (FYM-10 Mg ha -1 season -1 ) alone showed greater C build up (40.5%) followed by 100% NPK+FYM (120:60:40 kg N,P,K ha -1 +5 Mg FYM ha -1 season -1 )(16.2%).In fact, a net depletion of carbon stock was observed with 50% NPK (-1.2 Mg ha -1 ) and control (-1.8 Mg ha -1 ) treatments.Only 28.9% of C applied through FYM was stabilized as SOC.A minimal input of 2.34 Mg C ha -1 y -1 is needed to maintain SOC level.Treatments with organics showed a higher carbon management index, and microbial biomass and other labile pools of SOC.Results also indicated that100% NPK+FYM could maintain yield sustainability with a lower cost of carbon sequestration.
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Claims 13
Claim · model-written summary
Total organic carbon pools ranked very labile above less labile above non labile above labile.
- Taxon
- rice
Oryza sativat0 - Outcome
- Total organic carbon (TOC)e0
- Setting
- different poolse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice cropping system”
e0“Total organic carbon (TOC) allocated into different pools in order of very labile > less labile > non labile > labile”
Claim · model-written summary
Very labile carbon constituted about 41.4%.
- Taxon
- riceOryza sativat0
- Outcome
- very labilee0
- Value
- 41.4e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice cropping system”
e0“very labile > less labile > non labile > labile, constituting about 41.4, 20.6, 19.3 and 18.7%, respectively”
Claim · model-written summary
Less labile carbon constituted about 20.6%.
- Taxon
- riceOryza sativat0
- Outcome
- less labilee0
- Value
- 20.6e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice cropping system”
e0“very labile > less labile > non labile > labile, constituting about 41.4, 20.6, 19.3 and 18.7%, respectively”
Claim · model-written summary
Non labile carbon constituted about 19.3%.
- Taxon
- riceOryza sativat0
- Outcome
- non labilee0
- Value
- 19.3e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice cropping system”
e0“very labile > less labile > non labile > labile, constituting about 41.4, 20.6, 19.3 and 18.7%, respectively”
Claim · model-written summary
Labile carbon constituted about 18.7%.
- Taxon
- riceOryza sativat0
- Outcome
- labilee0
- Value
- 18.7%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice cropping system”
e0“very labile > less labile > non labile > labile, constituting about 41.4, 20.6, 19.3 and 18.7%, respectively”
Claim · model-written summary
FYM alone increased carbon buildup by 40.5% against control.
- Taxon
- riceOryza sativat0
- Treatment
- farmyard manure (FYM-10 Mg ha -1 season -1 ) alonee0
- Outcome
- C build upe0
- Direction
- greatere0
- Value
- 40.5%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice cropping system”
e0“In comparison with control, system receiving farmyard manure (FYM-10 Mg ha -1 season -1 ) alone showed greater C build up (40.5%)”
Claim · model-written summary
NPK plus FYM increased carbon buildup by 16.2%.
- Taxon
- riceOryza sativat0
- Treatment
- 100% NPK+FYM (120:60:40 kg N,P,K ha -1 +5 Mg FYM ha -1 season -1 )e0
- Outcome
- 100% NPK+FYMe0
- Value
- 16.2%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice cropping system”
e0“100% NPK+FYM (120:60:40 kg N,P,K ha -1 +5 Mg FYM ha -1 season -1 )(16.2%)”
Claim · model-written summary
The 50% NPK treatment depleted carbon stock by 1.2 Mg per hectare.
- Taxon
- riceOryza sativat0
- Treatment
- 50% NPKe0
- Outcome
- carbon stocke0
- Direction
- depletione0
- Value
- -1.2 Mg ha -1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice cropping system”
e0“a net depletion of carbon stock was observed with 50% NPK (-1.2 Mg ha -1 )”
Claim · model-written summary
The control depleted carbon stock by 1.8 Mg per hectare.
- Taxon
- riceOryza sativat0
- Outcome
- controle0
- Value
- -1.8 Mg ha -1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice cropping system”
e0“control (-1.8 Mg ha -1 ) treatments”
Claim · model-written summary
Of applied FYM carbon, 28.9% stabilized as soil organic carbon.
- Taxon
- riceOryza sativat0
- Outcome
- C applied through FYM was stabilized as SOCe0
- Value
- 28.9%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice cropping system”
e0“Only 28.9% of C applied through FYM was stabilized as SOC”
Claim · model-written summary
An input of 2.34 Mg C per hectare yearly is needed to maintain soil carbon.
- Taxon
- riceOryza sativat0
- Outcome
- maintain SOC levele0
- Value
- 2.34 Mg C ha -1 y -1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice cropping system”
e0“A minimal input of 2.34 Mg C ha -1 y -1 is needed to maintain SOC level”
Claim · model-written summary
Organic treatments had higher carbon management index and microbial biomass.
- Taxon
- riceOryza sativat0
- Treatment
- Treatments with organicse0
- Outcome
- carbon management index, and microbial biomass and other labile pools of SOCe0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice cropping system”
e0“Treatments with organics showed a higher carbon management index, and microbial biomass and other labile pools of SOC”
Claim · model-written summary
NPK plus FYM maintained yield sustainability with a lower cost of carbon sequestration.
- Taxon
- riceOryza sativat0
- Treatment
- 100% NPK+FYMe0
- Outcome
- yield sustainabilitye0
- Direction
- maintaine0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice cropping system”
e0“100% NPK+FYM could maintain yield sustainability with a lower cost of carbon sequestration”
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