Combination of Liquid Organic and Chemical Fertilizer on Corn and Soybean Using Intercropping in Ultisols

Abstract

Soybean intercropping has been done a lot. Growth rate, dry matter yield, and N, P, and K nutrient uptake are determined by soil fertility conditions as a plant growth medium. One of the ways to support the growth and yield of maize-soybean plants grown in intercropping is to use liquid organic fertilizers made from landfill leachate combined with chemical fertilizers. This study aimed to determine the ability of liquid organic fertilizer to support the growth and yield of corn-soybean plants planted in intercropping in the field in combination with chemical fertilizers. The materials to be used in this study were Ultisol soil, liquid organic fertilizer, Urea (N), T.S.P. (P), KCl (K), dolomite, sweet corn seed var. Nusa 1 and soybean var. Anjosmoro. This study used an experimental method with a randomized block design. The treatments were A = 4% LOF + 0 NPK, B = 4% LOF + 1/5 NPK, C = 4% LOF + 2/5 NPK, D = 4% LOF + 3/5 NPK, E = 4% LOF + 4/5 NPK, and F = 4% LOF + 1 NPK. The results showed that the giving of LOF combined with N.P.K. affected plant height, leaf area, plant stover weight, soybean cob/seed weight, absorption of nutrients N, P, K, metal content of Pb, Cd, Cu and Cr and N.K.L. in corn and soybean crops. The best 4% LOF + 2/5 NPK treatment for soybeans and the best 4% LOF + 3/5 NPK treatment for corn plants.