PENGARUH PEMBERIAN Bacillus aryabhattai TERHADAP PENINGKATAN POPULASI BAKTERI PENAMBAT N SIMBIOTIK DAN PENINGKATAN PRODUKSI TANAMAN BAWANG DAUN

Green onion is one of the vegetable commodities that have high economic value and high preferable by the community. Green onion has been exported to the other countries. To increase production it is necessary to use technology to fulfill market demand. The One of technology is adding bacteria in the cultivation of the plant. Bacillus aryabhattai is a bacterium that rapidly colonizes the roots of host plants, promotes plant growth, increases the availability of good nutrition, and has antagonistic effects on plant pathogens. The aim of this research is to know the effect of Bacillus aryabhattai in increasing the population of symbiotic N-stimulating bacteria and to increase crop production. The research was carried out at screen house and laboratory of Agricultural Environment Research Center. The soil was andosol soil from Kaliangkrik Subdistrict of Magelang district. The study was conducted from December 2016 to March 2017. The study design was a randomized block design with 4 treatments and 6 replications. The treatments include control (D1), Bacillus aryabhattai (D2), POC (D3), Trichoderma (D4). The results showed that D2 treatment had a high bacterial population and positively affected plant height, root length, root weight and leaf production. The conclusion of Bacillus aryabhattai giving great influence in multiplying the population of symbiotic N binding bacteria, thus increasing the production of green onion.