Differences in Zinc efficiency of hydroponically cultured Greengram genotypes

Zinc is considered as an essential micronutrient for growth and yield of various agricultural crops which in turn is needed for Human nutrition as well. Zinc deficiency is a critical nutritional problem in crops and is responsible for low yield and poor quality. Greengram genotypes (Vigna radiata) differ in their responses to Zn and it is the characteristics of cultivars to provide better yield under different Zn availability. A solution culture experiment was conducted to evaluate twenty greengram genotypes for their Zn efficiency under zinc sufficient (2.50 mg Zn L⁻¹) and deficient (0.0 mg Zn L⁻¹) conditions using Hoagland's Nutrient Solution. The plants were grown hydroponically and harvested after 30 days of transplanting. Zinc efficiency in the selected genotypes ranged from 73% to 111% and the genotypes differed significantly in Zn efficiency. Based on higher Zn efficiency, the genotypes, Pusa Vishal, K 851 and CO 7 were Zn efficient while CO 912, CO 6, ADT 3 and Local variety were Zn inefficient Greengram genotypes