Effect of nitrogen, potassium and humic acid on vegetative growth, nitrogen and potassium uptake of potato minituber in greenhouse condition

In order to study the effects of nitrogen, potassium and acid humic fertilizer on nitrogen and potassium on the uptake in potato variety Savalan, factorial experiment based on completely randomized design was performed in six repeats. In experiment, factor, A includes three levels of urea (0, 100 and 200 kg/ ha) was applied at the time of planting and for time on stem elongation, factor B involves three levels of K fertilizer (0, 75 and 150 kg/ ha) at planting time and includes two levels of factor C humic acid fertilizer (non sprayed and sprayed two liters per hectare) a week before the week was used in the soil. The results showed that the highest leaf area, plant height, shoot dry weight, number of leaves and spad in the application of treatments and 200 kg/ha of nitrogen fertilizer application treatments used 100 kg/ha of potassium was observed. Used in all traits studied humic acid was increased from the control treatment, so that the application of acid humic has caused increased 10 percent in the leaf number and 28 percent increase dry weight root than control. Based on the results said that the humic acid application with nitrogen and potassium fertilizer can increase crop production.