Assessing the Beneficial Effect of Spent Coffee Ground Compost under Mustard Plants (Brassica juncea L)

Aims: Spent Coffee Ground (SCG) compost is a compost made with raw materials SCG, cow dung, and chicken manure, with the addition of Aspergillus sp. and Penicillium sp. starters. The nutrients contained in the SCG compost are very good when implemented in horticultural crops. Therefore, it is necessary to study the benefits of SCG compost in plants. One of the horticultural crops that is widely cultivated by farmers is mustard greens.

Study Design: the design of the study here is descriptive. Data will show in table and graphic.

Place and Duration of Study: Department of Agricultural Product Technology University of Jember, between January 2023 and June 2023.

Methodology: The concentration of the compost added to each pot was 1, 2, 3% of the total soil. The amount of soil used in each polybag is 50 gr. The implementation of the compost SCG is carried out during the vegetative phase of the plant (21 days). The mustard seed and soil used are commercial. The type of soil used is pure soil and less on nutrition or without a mixture of fertilizers. The samples were oven dried at 65 °C for 48 h to constant weight and ground for nutrient analysis. In all analyses, three repetitions were performed for each sample.

Results: Plants with the addition of SCG compost (C2) as much as 3% have the best results when compared to the addition of commercial compost (C1) and compost control (C0) in terms of plant physical and nutrients contained therein. Likewise with the biomass produced. The results of the in vitro germination index analysis also proved that the fungi starter implemented in the Mustard plant had the best GI value, namely 200.4%.

Conclusion: Adding compost have positive effect for plant growth especially for length of stem and width of leaves.