QUANTIFICATION OF SWEET POTATO (IPOMOEA BATATAS L.) GROWTH CILEMBU VARIETY RANCING JAWER CLONE WITH VARIOUS CONCENTRATIONS OF PGPR IN MONOCULTURE SYSTEM

• Main Author: Ediva Wibowo, Valerie
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/81753
• Institution: Institut Teknologi Bandung

Sweet potato (Ipomoea batatas L.) is a leading staple food commodity in Indonesia. Apart from being high in carbohydrates, sweet potatoes contain ?-carotene. However, there are still constraints of pest and disease attacks and infertile soil that result in low sweet potato productivity. One of the efforts to overcome these obstacles is through the application of Plant Growth-Promoting Rhizobacteria (PGPR) or plant growth-promoting rhizobacteria. This study aims to evaluate the effect of PGPR concentration and determine the best PGPR concentration on the growth of sweet potato vine varieties Cilembu clone Rancing Jawer with monoculture system. The research design used was a simple Randomized Group Design (RAK) pattern with four PGPR concentration treatments, namely control (0 g/L), 10 g/L, 20 g/L, and 30 g/L and 6 repetitions. Spraying PGPR on sweet potato plants is done once a week in the morning. Measurement and observation data were taken weekly during the vegetative phase. Observations were made from 2 weeks to 9 weeks. The variables observed included vine length, stem diameter, stem circumference, number of branches, growth rate, and microclimate and edaphic. These variables were analyzed with the Analysis of Variance (ANOVA) test. If there is a significant effect of the treatment, followed by further Duncan Multiple Range Test (DMRT) at a real level ? 5%. The results showed that PGPR concentration significantly affected the growth of tendrils at 3, 4, 7, and 9 weeks after planting for stem diameter; at 3, 7, and 9 weeks after planting for stem circumference; at 4 weeks after planting for tendril length; and at 2, 3, and 9 weeks after planting for the number of branches. The recommended dose of PGPR in this study was 20 g/L.