Effect of Liquid Organic Biofertilizer (LOB) Consentrations and Sawdust Mulch of Kailan Plants (Brassica oleracea L.Var. Alboglabra)

In increasing kale productivity, organic mulch can be used through the application of sawdust mulch and fertilization through fertilizer applications. This study aims to determine the concentration of LOB and the thickness of sawdust mulch and the best combination of LOB concentration and sawdust mulch thickness on the growth and yield of kale plants. This study was conducted in May until July 2024, on the Lampung State Polytechnic land, using a Randomized Block Design (RAK) with two treatment factors, namely: The first factor is the concentration of organic fertilizer LOB consisting of 4 levels, namely 0 ml.1-1 (P0), 15 ml.1-1 (P1), 20 ml.1-1 (P2), 25 ml.1-1 (P3). The second factor is the thickness of sawdust mulch consisting of 3 levels, namely 2 cm mulch thickness (M1), 3 cm mulch thickness (M2), 4 cm mulch thickness (M3). The data obtained were analyzed using analysis of variance. The results showed that the combination of two factors did not show a significant effect on all observation parameters. The sawdust mulch thickness treatment showed a significant effect on plant height but did not have a significant effect on the other parameters.