Biofertilizers and Cow Urine Affect Growth, Nutrient Absorption and Yield of Caisim (Brassica chinensis var. parachinensis) on Peat Soil

Background: Caisim is a vegetable commodity with commercial potential and promising prospects. Considering the climatological, technical, economic and social aspects, Caisim is feasible to cultivate in Indonesia. The research aims to determine the interaction of biofertilizer and cow urine concentration on the morpho-physiological and yield of Caisim on peat soil. Methods: Research was conducted in Tanjungpura University, Pontianak City, Indonesia. The research period from March 15th to November 30th 2024. The research used a completely randomized factorial design. The first factor consisted of the concentration level of biofertilizer, namely 2, 4 and 6 ml L-1. The second factor was the concentration level of cow urine 200, 300 and 400 ml L-1. Result: The application of biofertilizer and cow urine supported the growth and yield of caisim. The interaction of biofertilizer at a concentration level of 4 ml L-1 and liquid organic fertilizer of cow urine 300 ml L-1 can increase the absorption of nitrogen, phosphorus and potassium of Caisim. In addition, the interaction can increase the root volume, plant biomass and leaf area of caisim on peat soil.