Abstract

Shallots are a horticultural commodity with high economic value. The high demand is reversed to the low production. The continuous and excessive use of NPK fertilizer in shallot cultivation will have an impact on decreasing land productivity. Plant Growth Promoting Rhizobacteria (PGPR) is an alternative to reduce this impact. The research aimed to examine the response of shallot plants to application of PGPR and several dosage levels of NPK 15-10-12 fertilizer, and to obtain the best treatment. The research was carried out from July to September 2023 in Sandaran Galeh Village, Sungai Penuh City, Jambi Province at an altitude of 836 m above sea level using a Randomized Block Design. The experiment used several concentrations of PGPR and doses of NPK 15-10-12 i.e. No PGPR and No NPK, NPK 525 kg ha-1, PGPR 5 mL L-1 + NPK 400 kg ha-1, PGPR 10 mL L-1 + NPK 275 kg ha-1, PGPR 15 mL L-1 + NPK 150 kg ha-1, and PGPR 20 mL L-1. Data were analyzed using ANOVA and DMRT test at the 5% level. The results showed that PGPR 15 mL L-1 + NPK 150 kg ha-1 produced the best growth response and yield in an effort to reduce the use of NPK 15-10-12 fertilizer. The PGPR can be applied to promote eco-green in shallot productivity. Bawang merah (Allium ascalonicum L.) termasuk komoditas hortikultura yang bernilai ekonomi tinggi. Namun, permintaan yang tinggi tidak diiringi dengan produksi yang optimum. Penggunaan pupuk NPK dalam budidaya bawang merah secara terus-menerus dan berlebihan akan berdampak menurunnya produktivitas lahan. Plant Growth Promoting Rhizobacteria (PGPR) menjadi alternatif dalam mengurangi dampak tersebut. Penelitian ini dilakukan untuk mengkaji respon tanaman bawang merah terhadap pemberian beberapa konsentrasi PGPR dan beberapa taraf dosis pupuk NPK 15-10-12, serta mendapatkan perlakuan terbaiknya. Penelitian dilaksanakan dari bulan Juli hingga September 2023 di Desa Sandaran Galeh Kota Sungai Penuh Provinsi Jambi dengan ketinggian 836 m dpl dengan menggunakan Rancangan Acak Kelompok. Perlakuan yang digunakan yaitu beberapa konsentrasi PGPR dan dosis NPK 15-10-12, yaitu tanpa PGPR dan tanpa NPK, NPK 525 kg ha-1, PGPR 5 mL L-1 + NPK 400 kg ha-1, PGPR 10 mL L-1 + NPK 275 kg ha-1, PGPR 15 mL L-1 + NPK 150 kg ha-1, dan PGPR 20 mL L-1. Data dianalisis menggunakan ANOVA dan uji lanjut DMRT pada taraf 5%. Hasil penelitian menunjukkan bahwa penggunaan PGPR 15 mL L-1 + NPK 150 kg ha-1 menghasilkan respon pertumbuhan dan hasil terbaik dalam upaya pengurangan penggunaan pupuk NPK 15-10-12. PGPR dapat diaplikasikan untuk mendukung produktivitas bawang merah yang ramah lingkungan.

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