Effect of potassium and biological fertilization on vegetative growth characteristics of two potatoes cultivars (Solanum tuberosum L.)

Abstract

This experiment was carried out during the spring growing season 2021 in the research field of the Faculty of Agriculture and Forestry / University of Mosul / Tourist Forestry Zone, to study the response of three factors in the vegetative growth traits of the potato varieties. The first factor included two varieties of potatoes (Taurus and Universa), the second factor included bio-fertilizer (Trichoderma fungi) with two levels and only once (5 g.m2, without addition), and the third factor included potassium fertilizer as sulfate potassium at four levels (0, 100, 200, 300 kg.ha-1). The results were as follows: The treatment of the cultivar Taurus gave the highest significant values in plant height, leafy area, number of aerial stems, relative content of chlorophyll in the leaves and percentage of dry matter in the leaves a value of 96.18 cm.Plant-1 , 5918.6 cm2.Plant-1 , 3.41 steem.Plant-1, 23.58 and 17.88% respectively. The treatment of bio-fertilization at a concentration of 5 g.m2 was given the highest significant values in the relative content of chlorophyll in the leaves at a value of 22.35.