Responses of Soybean with A Biofertilizer Containing Ochrobactrum sp., Alcaligenes sp., and Bacillus sp. at The Various Level Doses of NPK Fertilizer in Inceptisols, West Java Jati Purwani and Rohani Cinta Badia Ginting
Research Center for Applied Microbiology, Research Organization for Life Sciences and Environment, National Research and Innovation Agency (BRIN)
Abstract
Biofertilizers can increase crop yield, but to obtain their effectiveness needs to test in the field. The research aimed to know the ability of a commercial biofertilizer containing Ochrobactrum sp., Alcaligenes sp., and Bacillus sp. on responses of soybean carried out on Inceptisols Bogor, West Java. The treatments consist of seven, i.e., control, a standard dose of NPK, and five combinations of NPK dose levels with a biofertilizer. Urea, SP36, and KCl standard dose measured by upland soil test kit is Urea 50 kg ha-1, SP36 100 kg ha-1, and KCl 100 kg ha-1. Result research showed that 50% and 75% of standard NPK treatment combined with biofertilizer gave soybean yields of 2.89 t ha-1 and 2.93 t ha-1, while the standard NPK (100% NPK) yielded soybean of 2.82 t ha-1. Biofertilizer can reduce the dose of NPK used by as much as 50%, equivalent to Urea by 25 kg ha-1, SP36 by 50 kg ha-1, and KCl by 50 kg ha-1, increase soybean yield by 13-21% and improve the value of relative agronomic efficiency by 143-173%. This biofertilizer is a promising strategy for inorganic fertilizers efficiency, increasing soybean yield in Inceptisols soil, and environmentally friendly.
