Abstract
A field experiment was conducted during rabi season of 2016-17 entitled “Effect of nitrogen and plant growth regulators on nutrient concentration and uptake of ajwain (Trachyspermum ammi L. sprague)” at Agronomy farm, Sri Karan Narendra College of Agriculture, Jobner in Jaipur district of Rajasthan. The experiment comprising of total twenty treatment combinations consisting four levels of nitrogen (0, 30, 60, 90 kg ha-1) and five levels of plant growth regulators (control, NAA 50 ppm at 40 day after sowing, NAA 50 ppm at 40 and 60 day after sowing, thiourea 500 ppm at 40 day after sowing, thiourea 500 ppm at 40 and 60 day after sowing) laid out in factorial randomized block design replicated thrice. The results showed that application of nitrogen up to 30 kg ha-1 significantly higher nitrogen concentration in grain and straw over control. However, total nitrogen uptake was significantly increased with application of 60 kg N ha-1 over lower levels, but remained at par with 90 kg N ha-1. Foliar application of plant growth regulators significantly increased nitrogen concentration in grain, straw and total nitrogen uptake of ajwain over control.
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