Abstract
One of the cultivation technologies that need to be considered in increasing rice production is the proper use of fertilizer. This study is to find out the substitution of NPK fertilizer with rice straw bokashi to the growth and yield of rice paddy plants cisantana varieties. This research was conducted from August to November 2020 in Samaku Village, Bualemo District, Banggai Regency. The method used is a RandomIzed Design Group (RAK) factorial pattern consisting of 2 factors, namely factor A (NPK fertilizer) and factor B (Straw Bokashi). The combination of NPK fertilizer and rice straw bokashi has no natural effect on rice paddy plants of Cisantana varieties. Still, it has a natural impact on grain dry weight per plot. The treatment of rice straw bokashi independently has a noticeable effect on the height of the plant, the number of saples, the number of productive saples and the length of the panic. The bokashi straw rice dose of 75% (3.75 tons/ha) is the best dose for high plant growth, number of saples, number of productive saples and malai length. While the dose of 75% NPK (187.5 kg/ha) + 75% bokashi rice straw (3.75 tons/ha) is the best combination dose for varied dry weight of grain per plot.
Highlights
Rice (Oryza sativa L.) is the staple food for more than 95% of Indonesia's population and is widely cultivated by farmers in the Banggai district
The data obtained were analyzed for variance according to the design used, namely a factorial randomized block design (RAK) using Minitab 16 software
Observation of the height of rice plants that were given a combination of NPK fertilizer and rice straw bokashi was carried out 5 times from 2 weeks to 6 weeks
Summary
Rice (Oryza sativa L.) is the staple food for more than 95% of Indonesia's population and is widely cultivated by farmers in the Banggai district. In 2018, rice productivity in the Banggai district was 4.31 tons/ha but decreased in 2019 to 4.28 tons/ha (BPS Central Sulawesi, 2020). One of the factors causing the decline in rice productivity is the insufficient supply of fertilizer on rice fields due to the reduction in fertilizer subsidies by the government. Inorganic fertilizer is required to produce>10 tons of GKG/ha with a minimum dose of 200 kg/ha of urea and 300 kg/ha of Phonska NPK (Agricultural Research and Development Agency, 2016)
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