Abstract
Zinc (Zn) fertilization, not only gives better yield of cereals but also provides better nutrition to the population. This study evaluated the effect of different Zn application methods on growth, yield and biofortification of Zn in rice. Zinc treatments included were: soil application (5 kg Zn ha-1) (SA), root dipping (2% ZnO slurry) (RD), foliar spray (0.5% ZnSO4.7H2O + 0.25% lime) at tillering and milking stage (FS) and combinations of these treatments. Significantly higher grain yield was obtained in SA + RD + FS and RD + FS (27.2 and 22.6% increase over RDF, respectively). Zinc content in grains had a significant positive correlation with grain yield (r = 0.395, p< 0.05). Efficiencies of applied Zn decreased with increasing Zn application rates, except crop recovery efficiency. Maximum Zn content in grains and bioavailability of the fortified Zn was recorded in SA + FS treatment. However, less than 1% of the fortified grain Zn was bioavailable. Zinc enrichment had a negative (p< 0.01) impact on Fe content in both grain (r =-0.538) and straw (r =-0.603), but showed a positive (p< 0.01) correlation in respect of Mn content in grain (r = 0.556).
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Claims 10
Claim · model-written summary
Combined soil, root dipping and foliar zinc increased grain yield by 27.2% over RDF.
Not reportedTaxon
Verbatim
e0“Significantly higher grain yield was obtained in SA + RD + FS and RD + FS (27.2 and 22.6% increase over RDF, respectively).”
Claim · model-written summary
Root dipping plus foliar zinc increased grain yield by 22.6% over RDF.
Not reportedTaxon
Verbatim
e0“Significantly higher grain yield was obtained in SA + RD + FS and RD + FS (27.2 and 22.6% increase over RDF, respectively).”
Claim · model-written summary
Grain zinc content correlated positively with grain yield.
Not reportedTaxon
Verbatim
e0“Zinc content in grains had a significant positive correlation with grain yield (r = 0.395, p< 0.05).”
Claim · model-written summary
Applied zinc efficiencies decreased as zinc application rates increased, except crop recovery efficiency.
- Treatment
- Zn application ratese0
- Outcome
- Efficiencies of applied Zne0
- Direction
- decreasede0
- Qualifier
- except crop recovery efficiencye0
Not reportedTaxon
Verbatim
e0“Efficiencies of applied Zn decreased with increasing Zn application rates, except crop recovery efficiency.”
Claim · model-written summary
Soil plus foliar zinc produced the maximum grain zinc content.
Not reportedTaxonComparator
Verbatim
e0“Maximum Zn content in grains and bioavailability of the fortified Zn was recorded in SA + FS treatment.”
Claim · model-written summary
Soil plus foliar zinc produced maximum bioavailability of fortified zinc.
Not reportedTaxonComparator
Verbatim
e0“Maximum Zn content in grains and bioavailability of the fortified Zn was recorded in SA + FS treatment.”
Claim · model-written summary
Less than 1% of fortified grain zinc was bioavailable.
Not reportedTaxon
Verbatim
e0“less than 1% of the fortified grain Zn was bioavailable”
Claim · model-written summary
Zinc enrichment correlated negatively with grain iron content.
Not reportedTaxon
Verbatim
e0“Zinc enrichment had a negative (p< 0.01) impact on Fe content in both grain (r =-0.538) and straw (r =-0.603)”
Claim · model-written summary
Zinc enrichment correlated negatively with straw iron content.
Not reportedTaxon
Verbatim
e0“Zinc enrichment had a negative (p< 0.01) impact on Fe content in both grain (r =-0.538) and straw (r =-0.603)”
Claim · model-written summary
Zinc enrichment correlated positively with grain manganese content.
Not reportedTaxonTreatment
Verbatim
e0“showed a positive (p< 0.01) correlation in respect of Mn content in grain (r = 0.556)”