EPrints Repository UNTIRTAPENGARUH PEMBERIAN VITAMIN B1 DAN PUPUK TEKNOLOGI NANO MELALUI DRIP IRRIGATION SYSTEM TERHADAP PERTUMBUHAN TANAMAN MANGGIS (Garcinia mangostana var. Macakal)ANNISANURRENIauthorMangosteen is a tropical fruit commodity originating from Southeast Asia, including Indonesia, Malaysia, Thailand, and Myanmar. The macakal mangosteen plant (Garcinia mangostana var. Macakal) is a plant originating from Lebak Regency, Banten Province. This study aims to determine the effect of vitamin B1 and nano zinc fertilizer application through a drip irrigation system on the growth of macakal mangosteen plants. This study was conducted from May to August 2023. It used a factorial randomized block design consisting of two factors. The first factor was vitamin B1 (V) (15 mg/l, 30 mg/l, and 45 mg/l), and the second factor was nano zinc fertilizer (T) (2 ml/l, 4 ml/l, and 6 ml/l). From these two factors, nine treatment combinations were obtained, and each treatment was repeated three times, resulting in 27 experimental units. The responses observed included Plant Height (cm), Stem Diameter (mm), Number of Leaves (pieces), Number of Branches, Leaf Length (cm), Leaf Width (cm), Leaf Length and Width Ratio (cm), and Leaf Greenness Level (chlorophyll units). Based on the results and discussion, the following conclusions can be drawn: (1.) Vitamin B1 through a drip irrigation system has a significant effect on stem diameter and leaf greenness parameters. (2.) Nano zinc fertilizer through a drip irrigation system has a significant effect on plant height and number of leaves parameters. (3.) There is an interaction between vitamin B1 and nano zinc fertilizer through a drip irrigation system on the number of leaves and number of branches parameters.S Agriculture (General)SB Plant culture2026-04-18UNIVERSITAS SULTAN AGENG TIRTAYASA;AGROEKOTEKNOLOGIThesis

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