Vegetables are horticultural plants that have an important role in human life. One of the vegetables that has long been known and favored by all levels of society because of its nutritional value is spinach (Amaranthus hybridus L.), so the hydroponic farming system can utilize narrow land as a medium.
This study was to determine the use of organic fertilizer for coffee grounds (Coffea arabica L.) as hydroponic nutrition in spinach (Amaranthus hybridus L.) This study aims to determine the effect of liquid organic fertilizer (POC) based on coffee grounds on the growth of hydroponic spinach (Amaranthus hybridus L.) plants. This study was an experimental study and used a completely randomized design (CRD) consisting of 2 factors and 3 replications. The main observation parameters include plant height (cm), number of leaves (strands), leaf area (cm2), wet plant weight (g), and plant dry weight (g).
The data were analyzed using the Analysis of Variance (ANOVA) test and further tested with DNMRT at the 5% level. The results obtained were that the application of coffee grounds (Coffea arabica L.) liquid organic fertilizer had no significant effect and could not increase the growth of spinach (Amaranthus hybridus L.) plants.
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Yudanur, P & Violita, & Fevria, R & Razak, A & Anandita, Parissa. (2022). Utilization of Liquid Organic Fertilizer Coffee Dregs (Coffea arabica L.) as Hydroponic Nutrients for Spinach (Amaranthus hybridus L.). Physiology. 2022. 8.