Abstract
The main aim of this research was to study the P and N releasing behaviour from fertilizer loaded nanoclay superabsorbent polymer composite (NCPC) and to test its effectiveness as a carrier of slow release fertilizer using pearl millet (Pennisetum glaucum) as test crop grown under Inceptisols. Results revealed that availability of Olsen P, 0.01M CaCl 2 -extractable P and mineral N in soils increased significantly due to addition of fertilizer as NCPC over conventional fertilizer (CF), at same dose of fertilizer application. Availability of P and N in soils receiving low dose of fertilizer (LDF) as NCPC (NCPC-L) was statistically at par with that of high dose of fertilizer (HDF) as CF (CF-H), particularly at critical crop growth stages. Addition of NCPC-H resulted in 18% additional biomass yield and 17% and 11% additional P and N uptake by pearl millet over CF-H, respectively. Similarly, at LDF, biomass yield, P and N uptake increased to 26, 23 and 16%, respectively, under NCPC (NCPC-L) treated soils than that in CF (CF-L) treated soil. Significant build-up in different non labile pools of inorganic P fractions (Al-P, Fe-P, occluded-P, Ca-P) was recorded on addition of CF as compared to NCPC application, irrespective of fertilizer doses.
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Claims 11
Claim · model-written summary
NCPC increased Olsen P availability over conventional fertilizer at the same dose.
- Treatment
- fertilizer as NCPCe0
- Outcome
- availability of Olsen Pe0
- Direction
- increasede0
- Comparator
- conventional fertilizer (CF)e0
Not reportedTaxon
Verbatim
e0“availability of Olsen P, 0.01M CaCl 2 -extractable P and mineral N in soils increased significantly due to addition of fertilizer as NCPC over conventional fertilizer (CF), at same dose of fertilizer application”
Claim · model-written summary
NCPC increased CaCl2 extractable P availability over conventional fertilizer.
- Treatment
- fertilizer as NCPCe0
- Outcome
- 0.01M CaCl 2 -extractable Pe0
- Direction
- increasede0
- Comparator
- conventional fertilizer (CF)e0
Not reportedTaxon
Verbatim
e0“availability of Olsen P, 0.01M CaCl 2 -extractable P and mineral N in soils increased significantly due to addition of fertilizer as NCPC over conventional fertilizer (CF), at same dose of fertilizer application”
Claim · model-written summary
NCPC increased soil mineral N availability over conventional fertilizer.
- Treatment
- fertilizer as NCPCe0
- Outcome
- mineral N in soilse0
- Direction
- increasede0
- Comparator
- conventional fertilizer (CF)e0
Not reportedTaxon
Verbatim
e0“mineral N in soils increased significantly due to addition of fertilizer as NCPC over conventional fertilizer (CF), at same dose of fertilizer application”
Claim · model-written summary
Low dose NCPC soil P and N availability was statistically at par with high dose conventional fertilizer.
- Treatment
- low dose of fertilizer (LDF) as NCPC (NCPC-L)e0
- Outcome
- Availability of P and N in soilse0
- Direction
- statistically at pare0
- Comparator
- high dose of fertilizer (HDF) as CF (CF-H)e0
Not reportedTaxon
Verbatim
e0“Availability of P and N in soils receiving low dose of fertilizer (LDF) as NCPC (NCPC-L) was statistically at par with that of high dose of fertilizer (HDF) as CF (CF-H), particularly at critical crop growth stages”
Claim · model-written summary
High dose NCPC increased millet biomass yield by 18% over high dose conventional fertilizer.
- Taxon
- pearl millet
Cenchrus americanuse0 - Treatment
- NCPC-He0
- Outcome
- biomass yielde0
- Direction
- additionale0
- Value
- 18%e0
- Comparator
- CF-He0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of NCPC-H resulted in 18% additional biomass yield and 17% and 11% additional P and N uptake by pearl millet over CF-H”
Claim · model-written summary
High dose NCPC increased millet P uptake by 17%.
- Taxon
- pearl milletCenchrus americanuse0
- Treatment
- NCPC-He0
- Outcome
- P and N uptakee0
- Direction
- additionale0
- Value
- 17%e0
- Comparator
- CF-He0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of NCPC-H resulted in 18% additional biomass yield and 17% and 11% additional P and N uptake by pearl millet over CF-H”
Claim · model-written summary
High dose NCPC increased millet N uptake by 11%.
- Taxon
- pearl milletCenchrus americanuse0
- Treatment
- NCPC-He0
- Outcome
- N uptakee0
- Direction
- additionale0
- Value
- 11%e0
- Comparator
- CF-He0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of NCPC-H resulted in 18% additional biomass yield and 17% and 11% additional P and N uptake by pearl millet over CF-H”
Claim · model-written summary
Low dose NCPC increased millet biomass yield by 26% over conventional fertilizer.
Not reportedTaxon
Verbatim
e0“at LDF, biomass yield, P and N uptake increased to 26, 23 and 16%, respectively, under NCPC (NCPC-L) treated soils than that in CF (CF-L) treated soil”
Claim · model-written summary
Low dose NCPC increased millet P uptake by 23%.
Not reportedTaxon
Verbatim
e0“at LDF, biomass yield, P and N uptake increased to 26, 23 and 16%, respectively, under NCPC (NCPC-L) treated soils than that in CF (CF-L) treated soil”
Claim · model-written summary
Low dose NCPC increased millet N uptake by 16%.
Not reportedTaxon
Verbatim
e0“at LDF, biomass yield, P and N uptake increased to 26, 23 and 16%, respectively, under NCPC (NCPC-L) treated soils than that in CF (CF-L) treated soil”
Claim · model-written summary
Conventional fertilizer significantly built up nonlabile inorganic P pools compared with NCPC.
- Treatment
- CFe0
- Outcome
- non labile pools of inorganic P fractions (Al-P, Fe-P, occluded-P, Ca-P)e0
- Direction
- build-upe0
- Comparator
- NCPC applicatione0
Not reportedTaxon
Verbatim
e0“Significant build-up in different non labile pools of inorganic P fractions (Al-P, Fe-P, occluded-P, Ca-P) was recorded on addition of CF as compared to NCPC application, irrespective of fertilizer doses”
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