PRE-PRODUCTION OF SWEET POTATO (IPOMOEA BATATAS L.) CILEMBU VARIETY RANCING USING PGPR INTEGRATED WITH HARVEST WASTE COMPOST

• Main Author: Cesara Supena, Alsakina
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/81757
• Institution: Institut Teknologi Bandung

The increase in Indonesia's population has led to an increase in demand in the food sector. Until now, Indonesian people still depend on one type of staple food, namely rice. The sweet potato plant (Ipomea batatas L.) is classified as the most popular tuber in the community and is quite easy to produce in various land conditions so that it plays a strategic role as a producer of carbohydrates to replace rice. National sweet potato productivity is still below its production potential which can reach 30 tons/ha. The growth and productivity of sweet potato plants can be increased by applying plant growth promoting rhizhobacteria (PGPR). The principle of PGPR works by increasing the number of active bacteria in the area around the roots of plants that will colonize the root system of cultivated plants and support their growth. This research aims to evaluate the effect of PGPR application with monoculture system. A randomized group design (RAK) with four treatments and 6 repetitions was used. The parameters observed included the number of leaves, leaf area, leaf area index, growth rate, and nitrogen and chlorophyll content in the leaves of sweet potato (Ipomea batatas L.) Cilembu variety Rancing, and examined the best PGPR concentration between 0 g/L (control), 10 g/L, 20 g/L, and 30 g/L. The results showed that the application of plant growth promoting rhizhobacteria (PGPR) to sweet potato (Ipomoea batatas L.) Cilembu variety Rancing with monoculture system had a significant effect on leaf area, leaf area index, nitrogen content, and chlorophyll content at the beginning of the growth period but had no significant effect at the end of the vegetative period (9 MST). The results of the study have not been able to provide recommendations for the optimum PGPR concentration to increase sweet potato growth.