Synergistic effect of straw-mulch and mycorrhiza-biofertilizer in increasing yield of black rice intercropped with soybean on raised-beds in aerobic irrigation system

Application of mycorrhiza-biofertilizer and intercropping with legume crops could improve performance yield red-rice grown onraised-beds under aerobic irrigation systems, but weeds became a serious problem, which needs more frequent weeding. A Split Split-Plot (SSP) experiment was designed to examine synergistic effects rice-straw mulch application on yieldof several black rice promising-lines that were additively intercropped soybean aerobically irrigated raised-beds. Three treatmentfactors including black-rice genotypes (G3, G9, G4/15), straw mulching (S0= without; S1= mulch), mycorrhiza-biofertilizer(M0= M1= biofertilizer) arranged as the main, subplots sub-subplots respectively in three blocks (replications).The results indicated biofertilizer significantly increased growth plants, whilethe also different variables. However, there significant interaction effectsof mycorrhiza-genotypes (M*G), mycorrhiza-straw (M*S), mycorrhiza-straw-genotype (M*S*G) variables,indicating variation responses mycorrhiza among genotypes. The M*S*G betweenstraw increasing yield, S1M1 treatment resulted highest grain yieldon G4/15 line (58.2 g/clump) while S0M0 treated G9 showed lowest (29.8 g/clump).