Agronomic Bio-fortification of Zinc in Sorghum (Sorghum bicolor L.) Genotypes
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Authors
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R.N. Katkar, D. Dambiwal S.R. Lakhe, V.K. Kharche, A.B. Age and R.B. Ghorade
Keywords:
Zinc content, sorghum grain, agronomic efficiency, recovery efficiencyAbstract
A field experiment was conducted to assess the zinc (Zn) content in sorghum grain, leaves, stem and root
with soil and foliar application of Zn. Significantly highest grain (3.25 t ha-1), leaves (3.87 t ha-1), stem
(7.92 t ha-1) and root (2.69 t ha-1) yield was recorded with soil application of 5 kg Zn ha-1 through ZnSO4
along with two foliar sprays @ 0.5% ZnSO4 before flowering and at dough stage as compared to soil
application of 5 kg Zn ha-1 alone or control. Among the eight sorghum genotypes, the genotype CSH-35
recorded significantly highest grain yield (3.99 t ha-1) as compared to the PVK-809, CSV-20, AKSV-181,
AKSV-161, AKSV-313, AKSV-314, AKSV-318 genotypes. Highest Zn content was recorded in sorghum
grain (43.5 mg kg-1), leaves (19.7 mg kg-1), stem (23.6 mg kg-1) and root (42.4 mg kg-1) consequent to soil
application of 5 kg Zn ha-1 through ZnSO4 along with two foliar sprays before flowering and at dough stage.
Soil plus foliar application of Zn increased the Zn uptake by grain, leaves, stem and root of sorghum. The
highest agronomic efficiency (AEZn) was recorded with the soil application of 5 kg Zn ha-1 through ZnSO4,
followed by soil application of 5 kg Zn ha-1 and two foliar application of ZnSO4 @ 0.5%, but the apparent
recovery efficiency (REZn) of Zn was highest in the latter case. The REZn increased with an increase in Zn
levels, but AEZn decreased with the increase in Zn levels.
Agronomic Bio-fortification of Zinc in Sorghum
(Sorghum bicolor L.) Genotypes
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