Pengaruh Hasil Metabolit Sekunder PSB (Photosyintethic Bacteria) terhadap Pertumbuhan Tanaman Pakcoy (Brassica rapa L.)
DOI:
https://doi.org/10.19184/bip.v8i1.53694Keywords:
bakteri fotosintetik, metabolit sekunder, pertumbuhan pakcoyAbstract
Bakteri Fotosintetik (PSB) menghasilkan beberapa metabolit diantaranya Asam Amino, zat bioaktif,
Oksigen, Karbon Dioksida. Zat bioaktif dalam PSB merupakan hasil metabolit sekunder dari bakteri
fotosintesis salah satunya fitohormon. Peran fitohormon seperti Auksin (IAA), Giberelin, dan Sitokin
pada proses fisiologis, mengatur masa dormansi perkecambahan biji, pembentukan akar, pemotongan,
serta pembentukan percabangan tanaman, seperti tanaman pakcoy (Brassica rapa L.). Penelitian
bertujuan untuk mengetahui pengaruh metabolit PSB (Photosyintethic Bacteria) dari sumber protein
hewani terhadap pertumbuhan tanaman pakcoy. Penelitian dilakukan di rumah kaca Fakultas
Pertanian Universitas Andalas pada 15 Agustus hingga 25 September 2024 menggunakan bahan: tanah
ordo Regosol, PSB dari sumber protein hewani, dan tanaman pakcoy. Tanah diambil di Nagari Korong
Tiram Kecamatan Ulakan Tapakis, Kabupaten Padang Pariaman, Sumatera Barat. Penelitian
menggunakan Rancangan Acak Lengkap Faktorial (RALF) (36 satuan percobaan) dengan perlakuan
yaitu (1) PSB telur ayam ras; (2) PSB telur ayam kampung; (3) PSB telur bebek; (4) PSB telur keong
mas; dan (5) PSB daging ikan nila. Parameter penelitian yaitu hasil metabolit PSB: IAA, Giberelin, dan
Sitokinin (pengukuran secara kuantitatif menggunakan spektrofotometer, metode kalorimetri), dan
Nitrogen (Kjeldhal), Phospor, dan Kalium, (ekstrak HNO3). Produksi tanaman meliputi pertumbuhan
vegetatif dan generatif. Indikator vegetatif adalah tinggi tanaman, dan jumlah daun, biomasa pakcoy
segar dan bobot kering setelah panen. Hasil penelitian menunjukkan bahwa PSB telur ayam ras
menghasilkan IAA, Giberlin dan Sitokinin paling tinggi. Unsur hara N, P, K tertinggi yaitu pada PSB
daging ikan nila. Pengaplikasian PSB daging ikan nila merupakan perlakuan terbaik dalam
meningkatkan pertumbuhan tanaman pakcoy seperti: tinggi tanaman, jumlah helai daun, bobot segar
tanaman, dan bobot kering tanaman.
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