The Effect of Biological Fertilizer on Increasing Upland Rice Yield in Rainfed Rice Land in Boyolali Regency
Yulis Hindarwati1a), Sri Minarsih1, Agus Supriyo1, Raden Heru Praptana1 and Anggi Sahru Romdon2

1Research Center for Crops, National Research and Innovation Agency. Cibinong Science Center, Jl. Raya Jakarta-Bogor, Cibinong, Kabupaten Bogor-Indonesia 16915
2Research Center for Behavioral and Circular Economic , National Research and Innovation Agency. Gedung Sasana Widya Sarwono Lantai 03. Jl. Gatot Subroto No. 10, Jakarta Selatan-Indonesia 12710

Abstract

Low availability of nutrients is an obstacle in increasing rice productivity in rainfed rice field. The application of a combination of biological fertilizers and inorganic fertilizers is known to increase the efficiency of using inorganic fertilizers. This study aims to determine the effect of biological fertilizers on the growth and yield of rice plants in rainfed rice fields. The study was conducted on rainfed rice fields in biofertilizer products were used in this study, namely PR, RC, ST, AGR, BV, AND GLK. The rice variety used is Situ Patenggang. The study used a randomized block design with 9 treatments and each treatment was repeated for 4 times. The nine treatments were: fertilization according to PUTK recommendation (P1)- 1/2 dose of PI (P2): P2 + manure (P3)- P2 + PR (P4)- P2 + RC (P5)- P2 + ST (P6)- P2+AGR (P7)- P2+BV (P8)- P2+GLK (P9). Planting using a 2:1 jajar legowo system with a spacing of 20 x 10 x 40 cm was carried out by direct planting of 4-5 seeds per hole. Biofertilizer application is carried out according to the instructions of each product. Parameters observed included: soil chemical status (N, P, K, C-organic, pH, CEC) before the study- plant growth (plant height, number of tillers and number of productive tillers)- yield (weight of harvested dry grain and dry milled)- and a simple farming analysis was carried out. The results showed that all combinations of biological fertilizers with 1/2 recommended dose were effective in increasing rice yields but it could not match the yield of rice fertilized according to the recommended dose. The combination of fertilization using GLK biofertilizer showed the highest yoield compared to the other biofertilizers with an advantage of 48.05% compared to 1/2 recommended dose of fertilization.

Keywords: Upland rice, Situ Patenggang, rainfed rice field, biological fertilizer, fertilizer dose

Topic: Agriculture engineering