Effect of spraying organic fertilizer extract, Potassium and Zinc fertilizer on some growth and yield parameters of Jerusalem artichoke Helianthus tuberosus L.

Abstract

An experiment was conducted in 2017 and 2018 in a private field/ Karbala province to study the effect of spraying organic fertilizer extract ,fertilization with potassium sulphate and spraying hydrous zinc sulphate on growth and yield parameters of Jerusalem artichoke plant. Experiment was conducted by Randomized Complete Block Design(R.C.B.D) with three replicates in three factors. First spraying two concentrations of organic fertilizer extract i.e.(0 and 500)ml.L-1. Second fertilization with potassium sulphate K2SO4 (K2O 52%) in three levels i.e. ( 0, 75 and 150) kg K2O.h-1. Third spraying of hydrous zinc sulphate ZnSO4.7H2O (35% Zn) in three concentrations i.e.(0, 2 and 4)g.L-1 . Organic fertilizer extract and hydrous zinc sulphate spraying were done twice, first after one month form planting, second after two month from first sprayer. Added potassium sulphate in three doses, first after three weeks from planting, second after 30 days from the first dose, third after three months from the planting.Means were compared by using the Multiple Range Test Duncan test at probability of 0.05. Results showed that spraying organic fertilizer increased significantly the number of branches, shoot dry weight, nitrogen percentage, number of tubers, plant yield and percentage of protein in tubers i.e.( 31.97 and 29.85branches.plant-1),(733.60 and 757.02g.plant-1),(4.22% and 3.57%),(43.46 and 40.20tuber.plant-1),(1865.90 and 1757.22g) and (5.06% and 5.79%) compared to the control treatment which gave the lowest values for two seasons respectively , Also fertilization with level 150kg K2O. h-1 superposed significantly and gave the highest values in leaves content of sulphur in the second season and the number of tubers, plant yield for two seasons, meanwhile the two levels 75 and 150 kg K2O. h-1 gave significant increases in plant height and the number of branches in the second season and the percentage of nitrogen and protein in the tuber for the first season. In addition to that spraying hydrous zinc sulphate in a concentrations 2g.L-1 gave significant increases in, leaves content of sulphur and protein percentage in tubers for two seasons, and number of tuber per plant in the second season only .Meanwhile spraying hydrous zinc sulphate in a concentrations 4g.L-1 gave significant increases in, shoot dry weight in the second season and nitrogen percentage , plant yield for two seasons, also in the second season nitrate percentage decrease significantly when spraying hydrous zinc sulphate in a concentrations 4g.L-1 that gave (0.0917%) compared to the control which gave (0.1001%).