Uji Banding Pemberian Silikat dan Organisme Pelarut Fosfat untuk Menurunkan Retensi P dan Meningkatkan Pertumbuhan Tanaman Jagung (Zea mays L.) pada Tanah Andisol

Abstract

A greenhouse study comparing the application of Silicate (lemongrass leaves and rice straw) versus Phosphate-Solubilizing Organisms (phosphate solubilizing bacteria and phosphate-solubilizing fungi) in reducing P retention and its effects on corn plant growth in Andisol soil. This study used a Non Factorial Randomized Block Design (RBD) with treatments consisting of: control, lemongrass leaf silicate (433,20 g/pot ), straw silicate (120,42 g/pot ), phosphate solubilizing bacteria (30 ml/pot), and phosphate-solubilizing fungi (30 ml/pot), with each treatment combination replicated 5 times. The observed parameters were soil pH (H2O), soil organic carbon, soil P-available, soil P retention, plant height, dry weight of plant canopy, dry weight of plant roots, and plant P uptake. The results of this study indicate that the application of lemongrass leaf silicate and straw silicate are more effective than the application of phosphate solubilizing organisms in reducing P retention, increasing plant height, dry weight of plant tops, dry weight of roots, and phosphorus uptake. The phosphate solubilizing bacteria were able to increase the available phosphorus in the soil the most, followed by the treatment with silicate from lemongrass leaves, the control group, phosphate-solubilizing fungi, and silicate from rice straw, however, overall, these effects were not statistically significant