Pengaruh Pemberian Vitamin B1 terhadap Pertumbuhan Bibit Beberapa Varietas Tanaman Kakao (Theobroma cacao L)

Abstract

This study aims to determine the effect of vitamin B1 application, variety and interaction of vitamin B1 and variety on the growth of cacao seedlings (Theobroma cacao L). This research was conducted in the Gauze House. Faculty of Agriculture, Universitas Sumatra Utara Medan, with an altitude of ± 25 meters above sea level. This research was conducted from July to December 2023. This study used a factorial randomized group design (RBD) consisting of 2 treatment factors. The first factor was cocoa plant variety consisting of three levels namely ICS 60, RCC 70, and Lindak, and the second factor was vitamin B1 application (concentration of 10 ml/liter) consisting of 4 application method namely control, soaking seeds, foliar aplication and soaking seed + foliar application. Observed vanabels were plant height, stem diameter, number of leaves, leaf area, number of branches. The results showed that vitamin B1 application, variety, interaction between varicty and vitamin B1 did not significantly affect all observation variables except vitamin B1 application significantly affected stem diameter at 6 WAP. However, based on several observation variables it is known that seedlings of Lindak variety which sprayed wilh vitamin B1 (V3B2) had better growth than other treatment combinations.