PEMANFAATAN JERAMI SEBAGAI PUPUK ORGANIK UNTUK MENINGKATKAN PERTUMBUHAN DAN PRODUKSI PADI (Oryza sativa)
The leveling off of rice production in Indonesia is caused by degradation of wetlands, which could be characterized by low organic matter content. The factors that cause this issue such as the utilization inorganic fertilizer only, the habit of farmers carrying out rice straw off from wetland or burning of rice straw. The objectives of this research were (1) to test the ability of decomposers in speeded up the decomposition process of rice straw,( 2) examined the effect of organic fertilizer on the growth and yield of rice. The experiment design is completely randomized block. The treatment of decomposers are control (D0), decomposers collection of Prof Iswandi Anas (D1), and commercial decomposers (D2). The treatments in field are NPK 100%, NPK 50%, NPK 50% + PO1, and NPK 50% + PO2 + PB. PO1 and PO2 was an organic fertilizer that each decomposed by D1 and D2, PB was a bioorganic fertilizer. Application of decomposers in this experiment did not speed up the decomposition of rice straw. It is caused because C/N the rice straw low. Application of 50% NPK with organik fertilizer to 100% NPK was not significantly, so that the role of organic fertilizer could not be evaluated. However, there was a tendency of enhancing growth and yield of rice in addition of decomposed organic fertilizer by decomposers.
Keywords: Decomposers, rice production, straw organic fertilizer