Application of

Leaf litter is is contains organic substances such as carbohydrates, proteins, and nutriens. Litter needs to decompose first so that organism and microorganisms can use it. Fungi help play break down litter in the environment. Trichoderma sp. 1 is a fungus that plays a role in the decomposition process. This study took place between June to September 2025 to determine the role of Trichoderma sp. 1, in breaking down Rhizophora mucronata leaf litter helps the growth of milkfish (Chanos chanos) seeds. 50 grams of the R. mucornata leaf litter was put into 20 litter bags. Trichoderma sp. 1 fungus was grown on PDA medium. Fungal agar cultures were cut into pieces and then mixed in a test tube with 2.5 ml of sterile water. Milkfish seeds were put into cages, with as many as 80 fish. Sampling was carried out every 15 days, using eight milkfish and one bag containing leaf litter. Measurement of the decomposition rate and the weight of the milkfish were carried out seven times. The R. mucronata leaf litter decomposed at a rate 16.54 grams/year, and the weight of the milkfish feed Trichoderma sp. 1 was 247.40 grams, while the control weighed 215.60 grams.