Integration of Paenibacillus alvei AK6SR into Compost-Plus Growing Media Improves Shallot (Allium cepa L.) Growth Performance
DOI:
https://doi.org/10.35326/agribisnis.v9i2.8162Keywords:
biofertilizer, compost plus, Paenibacillus alvei AK6SR, plant growth-promoting bacteria, shallotAbstract
Kompos banyak digunakan sebagai amelioran tanah organik, namun sebagian besar produk kompos komersial belum diperkaya dengan mikroorganisme fungsional. Penelitian ini bertujuan untuk mengembangkan formulasi Compost Plus yang diinokulasi dengan Paenibacillus alvei AK6SR, yaitu bakteri yang memiliki kemampuan melarutkan fosfat, potensi fiksasi nitrogen, serta memproduksi senyawa indol, serta mengevaluasi pengaruhnya terhadap pertumbuhan dan hasil tanaman bawang merah (Allium cepa L.). Formulasi Compost Plus terdiri atas 90% kompos, 10% tepung tapioka, dan 20% air. Percobaan disusun menggunakan Rancangan Acak Lengkap dengan lima perlakuan, yaitu K0 (tanpa kompos), K1 (5% Compost Plus), K2 (10% Compost Plus), K3 (15% Compost Plus), dan K4 (20% Compost Plus), berdasarkan bobot tanah 8 kg per satuan percobaan, dengan lima ulangan. Viabilitas bakteri dan kadar air diukur selama dua bulan. Parameter pertumbuhan tanaman bawang merah diamati yaitu tinggi tanaman, jumlah anakan umbi dan berat kering umbi. Formulasi Compost Plus mampu mempertahankan dan meningkatkan viabilitas P. alvei AK6SR selama delapan minggu penyimpanan, dengan viabilitas mencapai 13,41 log CFU mL⁻¹ dan kadar air kompos sebesar 55,02 ± 0,97%. Pemberian 10% Compost Plus menghasilkan pertumbuhan bawang merah yang optimal, dengan tinggi tanaman 34,72 cm, jumlah anakan rata-rata 10,6 per rumpun, serta bobot umbi kering angin sebesar 20,6 g. Hasil penelitian ini menunjukkan bahwa Compost Plus yang diperkaya P. alvei AK6SR berpotensi sebagai amelioran organik fungsional untuk mendukung produksi tanaman yang berkelanjutan.
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