Variations of Potato Tuber Yield and Quality in Response to Vermicompost Application and Complete Nanofertilizer

Vermicompost is produced by earthworms via processing organic wastes such as manure, plant residues, etc., and contains nutrients, vitamins, enzymes, antibiotics, growth enhancers, and humic substances which can increase plant growth and yield. Nano fertilizers are also results of a new technology that help the plants optimal use of nutrients with the properties of slow release of nutrients. This experiment was conducted in order to evaluate effect of vermicompost values (0, 3, 6 and 9 tons per hectare) and different methods of complete nano fertilizer (Super fertilizer) application (control (with no nanofertilizer application), fertigation (5 kilograms per hectare), foliar application (in a ratio of 2 per thousand), fertigation and foliar application together) on quality and yield of potato at research field of University of Mohaghegh Ardabili during 2018 crop year as a factorial experiment based on randomized complete block design with three replications. Results indicated that application of 9 tons per hectare vermicompost had the most starch, calcium, iron, phosphorus and tuber yield and the least tuber nitrate content. Additionally, complete nano fertilizer fertigation and foliar application together had the highest effect on these traits. Furthermore, the interaction of vermicompost and complete nano fertilizer was significant on lysine and methionine percentage of protein, tuber protein percentage and potassium content. By increasing the amount of vermicompost, the values of these traits increased and in all vermicompost application levels, fertigation and foliar application of complete nano fertilizer together indicated the best effect.