Optimization of Local Resources as Organic Fertilizer Through Various Formulations for Pakcoy Plant Growth

Organic fertilizers are the result of microbiological activity in breaking down organic matter. They are slow- release, and can remain in the soil longer than inorganic fertilizers. Applying organic fertilizers can increase soil microbial activity, suppress plant diseases, and improve nutrient absorption efficiency, thereby maintaining or increasing soil and plant productivity ( Miner et al., 2020). This research creates organic fertilizer/compost using various waste formulations from local resources, expected to produce quality organic fertilizer with macronutrient content in accordance with the standards of the Minister of Agriculture Regulation no. 261/KPTS/SR.310/M/4/2019. The research aims to: 1) determine the best nutrient content of organic fertilizer from cow, goat and leather waste, 2) determine the quality of organic fertilizer from research results by comparing the standards of Permentan no. 261 / KPTS / SR.310 / M / 4/2019, and 3) measure the growth of pak choy plants. The results of the study showed that : 1) the best nutrient content is organic fertilizer from cowshed waste with an organic C content of 31.17%, a C/N ratio of 17.42, a total N of 1.820%, a total P of 0.135, a total K of 0.256% and a pH of 7.78. 2) the organic fertilizer results of the study when compared with the standard of Permentan no. 261/KPTS/SR.310/M/4/2019 are still below the standard so they have low nutrient quality, and 3) the application of organic fertilizer does not significantly affect the growth of height, number of leaves, length and width of leaves of pak choy plants.