Pemanfaatan Mikroorganisme Lokal (MOL) Buah Pepaya (Carica Papaya) dalam Meningkatkan Pertumbuhan Tanaman Padi (Oryza Sativa L.)

Abstract

MOL (Local Microorganisms) derived from natural ingredients such as papaya fruit that is almost rotten can be used as biological fertilizer to increase the growth of rice plants. This study aims to determine the population of beneficial microorganisms as plant growth promoters from papaya MOL, determine the levels of IAA and NPK minerals in papaya MOL, and determine the effect of papaya MOL on rice plant growth. Papaya fruit that was almost rotten was fermented with two treatments, namely with the addition of molasses (MOL 1) and without molasses (MOL 2). The results of papaya MOL fermentation for each treatment were then analyzed for quality by calculating the total microbial population, levels of IAA, and levels of NPK. The total microbial population observed were total bacteria, N-fixing bacteria, chitinolytic bacteria, and phosphate solubilizing bacteria. The effect of papaya MOL on rice plant growth was carried out by means of eight treatments, namely MOL 1 100%, MOL 1 50%, MOL 2 100%, MOL 2 50%, MOL 1 + MOL 2 100%, MOL 1 + MOL 2 50%, without MOL (negative control), and pearl fertilizer (NPK) (positive control). Observation of the quality of rice plants in the form of plant height, dry weight, wet weight, chlorophyll a content, chlorophyll b content, and total chlorophyll content. The application of molasses did not affect the total population of bacteria and the total population of N-fixing bacteria. The total population of chitinolytic bacteria was more commonly found in the MOL 1 treatment, while the total population of phosphate solubilizing bacteria was found in the MOL 2 treatment. The highest levels of IAA were in the MOL 1 100 treatment. % was 38.25 ppm and the lowest was in the MOL 1 + MOL 2 50% treatment, which was 22.59 ppm. The highest total N levels were in the MOL 2 treatment of 0.18%, the highest P levels in the MOL 1 treatment of 0.09%, and the highest K levels in the MOL 2 treatment of 0.13%. The height of the rice plant in the pearl fertilizer (NPK) treatment was significantly different from the other treatments, namely 57.4333 cm, but not significantly different from the MOL 1 + MOL 2 100% treatment of 56.9333 cm. The wet weight of rice plants in the MOL 1 50% treatment was significantly different from the other treatments, namely 153.333 g, but not significantly different from the MOL 1 100% treatment at 146.6667 g. While the dry weight parameters of plants were not significantly different in each treatment. The chlorophyll content in the pearl fertilizer treatment was higher and significantly different than the other treatments, namely chlorophyll a 26.6833, chlorophyll b 25.8333, and total chlorophyll 52.5200.