Root morphology of several varieties of sorghum (Sorghum bicolor (L.) Moench.) on ultisols treated with cocopeat

Abstract

This research aimed to determine the root morphology of several sorghum varieties on Ultisol soil-medium treated with cocopeat. The research was carried out at the Greenhouse of the Faculty of Agriculture, Universitas Sumatera Utara, Medan, from April 2019 to January 2020. This research used a randomized block design with two factorials and three replications. Factor I was the planting medium (topsoil, Ultisol, Ultisol + 1 kg of Cocopeat, Ultisol + 2 kg of Cocopeat). Factor II was the Sorghum variety (Pahat, Kawali, Samurai 1, and Samurai 2) treatment. The results indicated that there are several differences in the appearances of sorghum plant varieties on the root morphology (root volume and length) of sorghum on Ultisol soil media treated with cocopeat, and there were interaction effects between sorghum plant varieties and Ultisol soil media treated with cocopeat on the root morphology (root length) of sorghum plants.