The problem of tidal land as a sugarcane planting area can be overcome by implementing cultivation technologies, including the use of local microorganisms and the application of water-saturated cultivation techniques. The objectives of this study were to determine the effect of AMF inoculants and several doses of phosphate fertilizer, as well as their interaction on the growth and productivity of sugarcane and soybeans, and also to determine the land efficiency of the sugarcane and soybean intercropping pattern. The study was conducted in the tidal land of Mulyasari Village, Tanjunglago District, Banyuasin Regency, South Sumatra. The experiment used a two-factor, three-replication design. The first factor was the application of AMF inoculant (without inoculation, and inoculation from corn host plants) and the second factor was the P fertilizer dose (0, 36, 72, 108 kg per ha P2O5), with a cultivation system of 4 months of saturation since planting. The results showed that the interaction between mycorrhizal application and P dose during the 4-month saturation period since planting did not show a significant difference in sugarcane productivity. However, AMF inoculant showed a significant effect on the productivity of sugarcane and soybean plants, both in intercropping and monoculture systems, during the 4-month saturation period. Meanwhile, the application of AMF inoculants and P2O5 doses did not significantly affect the land equivalency ratio (LER) during the 4-month saturation period. Sugarcane-soybean intercropping can improve land utilization compared to monoculture, with LER values ranging from 1.55 to 1.73.
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