Micronutrient Uptake at Different Growth Stages of Cotton Genotypes in Relation to Soil Salinity

A significant reduction in Fe, Mn, Zn and Cu uptake at different stages ojcrop i.e. 30 DAS, 60 DAS and at harvesting stage was noted as soil salinity increased from 0.94 dS m⁻¹ (S0: control) to 24 dS m⁻¹ (S4). In general, the uptake of all four micronutrients increased withtheage of crop from 30 DAS to harvesting stage with slight over lapping in few genotypes, except in case of Fe uptake. Lower Fe uptake was recorded in kapas compared to stubbles at harvesting stage and 60 DAS. Out of the four micronutrients, the decrease in manganese uptake was maximum followed by Zn, Fe and Cu uptake due to salinity. Among genotypes V₆ was found to be capable of absorbing more micronutrients compared to V₁, V₂, V₃ and V₁₁ under saline soil conditions.