EFFECT OF P FERTILIZER DOSAGE AND MYCORRHIZA ON THE GROWTH OF LEGUME COVER CROP (Callopogonium Mucunoides) IN LATOSOL SOIL

Calopogonium mucunoides was a type of LCC that is often used in oil palm plantations. This plant was useful for preserving the soil surface, reducing soil temperature, and increasing soil fertility. This LCC plant was able to fix nitrogen by producing large amounts of organic matter and increase soil fertility through the use of rhizobium in plant root nodules. This study aimed to determine the optimal dose for the growth of Calopogonium mucunoides and the effect of P fertilizer and mycorrhiza. This study used a two-factor randomized complete block design (CRD). The first factor was TSP fertilizer (0 g, 2 g, 4 g) the second factor was mycorrhiza (0 g, 10 g, 20 g). The parameters observed were plant height, number of leaves, vine length, plant fresh weight, plant dry weight, root fresh weight, root dry weight and number of root nodules. The results showed that the dose of TSP fertilizer had no significant effect on all parameters, while the application of mycorrhiza had a significant effect on the number of leaves, fresh weight of roots, and the number of root nodules. Plant height, number of leaves, and vine length were best achieved with a dose of 2 grams of TSP fertilizer and 20 grams of mycorrhiza. In the parameters of plant fresh weight, plant dry weight, root fresh weight, root dry weight, and number of root nodules, the best was achieved by applying a dose of 0 grams of TSP fertilizer and 20 grams of mycorrhiza. From this study, it is suspected that the application of mycorrhizal organic fertilizer can complement the important role of inorganic TSP fertilizer