Effect of Nano fertilizers and amino acid of tryptophan on some physiological characteristics of saffron plant Crocus sativus L.
Authors: Abdul Majeed Lina , Saeed Kefaia , Mohammed Mohsin 
Published: April 2023

study was carried out in the Lathhouse , agricultural research station belonging to the College of Agriculture, University of Kirkuk - Iraq for for the period 15/9/2021 to 20/4/2022, to study the effect of spraying with different concentrations(0, 1.5, 3.0) g.L-1 of nano-fertilizers (NPK, N, P), and soaking the corms with the amino acid tryptophan at concentrations (0,150,300) mg.L-1 before planting for 24 hours affected the growth, flowers and yield of the corms of saffron plant( Crocus sativu L.) Kormat saffron was obtained from the Islamic Republic of Iran,the factorial experiment was designed according to the( R.C.B.D ) Randomized Completely Block Design, the results were analyzed according to the statistical program) SAS, 2005 (The Statistical Analysis, and Duncan's Multiple Range Test was used to compare averages at the level of probability 5%, NPK Nano fertilizer resulted in a significant increase in the number of flowers when the plants were sprayed with a concentration of 3.0g.L-1 and reached 2.5 flowers.plant-1, while the highest average weight of corms was 24.02g when sprayed with a concentration of 1.5 g.L-1.Nano-nitrogen fertilizer at a concentration of 3.0 mL.L-1had a significant positive effect on increasing the average number of leaves at the second stage and reached 30.27 leaves, and the highest dry weight of the stigmas was 0.090 g .The number of branches for the first stage amounted to 4.53 buds.plant-1,while spraying with a concentration of 1.5 gm.L-1 increased the average number of branches in the second stage and reached 6.06 buds.plant-1,Soaking the corms with a concentration of 150 mg.L-1 of the amino before planting led to a significant increase in the average number of leaves in the first stage, which amounted to 14.60 leaves.Plant-1, the fresh weight of the corms was 19.08 g, and the least number of flowers was 1.3 flowers. Plant-1 As for the soaking at a concentration of 300 mg.L-1, the highest number of branches were (4.74 and 5.62) bud.plant-1 for both stages, respectively, and the highest number of leaves after flowering was 28.66 leaves.plant-1 , number of flowers 1.5 flower.plant-1, and the dry weight of the stigmas was 0.082 g, while the control plants had the lowest average number of branches (3.60and5.08) bud.plant-1 for both stages,The interaction between spraying with Nana-fertilizer and soaking with the amino acid tryptophan had a significant effect on physiological characteristics, the response was different according to the Nana-fertilizer and its concentration, average number of leaves and flowers increased (15.40 leaves, plant-1 and 3.0 flowers), wet weight of corms 31.08 g , Nano fertilizer at a concentration of 3.0 ml L-1 increased at the same concentration above the acid increased the average number of leaves to 32.60 leaves.Plant-1, nano-phosphorus fertilizer at a concentration of 3.0 g.L-1 at the same concentration of the above acid led to an increase in the average number of branches for both stages (5.20 and 8.40) bud.Plant-1 .