Growth and Yield of Komak Beans (Lablab purpureus (L.) Sweet) with Application of Photosynthetic Bacteria PNSB under Shade

Abstract

The research was conducted to determine the effect of the application of PNSB on the growth and yield of komak beans under shade. The experiment was arranged in a Split Plot Design, consisting of two factors, namely shade as the Main Plot and concentration of PNSB as Sub-Plots.  The shade consists of two levels (no shade and 50% shade).  The PNSB concentration consists of three levels (0; 5;  and 10 mL L-1).  Each treatment was carried out with four replications. Data were analyzed using analysis of variance and continued with Duncan's Multiple Range Test at a 5% significance level. The results showed that the effect of shade was significantly different on stem diameter at 70 DAP, chlorophyll content (a, b, and total), and the number of dry seeds, very significantly different to stem diameter at 105 DAP, dry pod weight, number of dry pods, dry seed weight, and light intensity. 50% shade reduces the yield component even if PNSB is provided. The effect of PNSB was not significantly different on all variables, except for the number of leaves at 35 DAP and total N content. Application of PNSB 10 mL L-1 increased the number of leaves aged 35 DAP and the total N content, both without shade and with shade, increased total chlorophyll content with 50% shade, but decreased without shade.