Tarbiat Modares University Journal of Agricultural Science and Technology 1680-7073 23 4 2021 07 01 Effect of Proportion of NO3- and NH4+ in Nutrient Solution and Growing Seasons on Yield and Quality in Coriander اثر نسبت NO3- به NH4+ در محلول غذایی و فصل رشد بر عملکرد و کیفیت گشنیز 891 902 16575 EN R. Kumari Department of Botany, Punjab Agricultural University, Ludhiana, Punjab, India. S. Bedi Department of Botany, Punjab Agricultural University, Ludhiana, Punjab, India. A. S. Dhatt Department of Vegetable Science, Punjab Agricultural University, Ludhiana, Punjab, India. V. P. Sethi Department of Mechanical Engineering, Punjab Agricultural University, Ludhiana, Punjab, India. Journal Article The effect of nutrient solutions with varying nitrogen forms was evaluated on yield and quality of coriander (cv. Punjab Sugandh) grown in soilless medium under polyhouse conditions. Crop was sown on three dates viz., October (main season), February, and July (off-season), respectively. In polyhouse, N (Nitrogen) was supplied in variable ratios of NO₃^-to NH₄⁺viz; 100:0 (T1), 75:25 (T2), 50:50 (T3), 25:75 (T4), 0:100 (T5), respectively, keeping total N content constant. Fresh foliage was harvested 3 times in each season at 30 days interval starting from date of sowing. At each harvest, plant growth quality parameters including activity of antioxidants enzymes were determined. Irrespective of the seasons, the yield was significantly higher in polyhouse than soil-grown crop, and among the nutrient solutions, the solution of T2 recorded significantly higher yield as well as growth and quality parameters during all the season. It could be concluded that NO₃^-to NH₄⁺ ratio of 75:25 in the nutrient solution improved both yield and quality and is thus most suitable for coriander crop. https://jast.modares.ac.ir/article_16575_05b0f710bc289f9c061e6d052ee60de7.pdf