Bakteri Pelarut Fosfat Sebagai “Plant Growth Promoting” Pada Tanaman Buah

Phosphate solubilizing bacteria/PSB (Pseudomonas fluorescent, Bacillus pantothenticus, B. megaterium, B. thuringiensis, B. polymyxa) were used as biofertilizer to stimulate the growth of avocado (Persea americana), durian (Durio zibetinus), sukun (Artocarpus altilis), and keluwih (Artocarpus cinensis) seedlings in degradated soil. An experiment was conducted at DAS citarum area, west Java. The aim of this experiment is a suitable inoculant used as biofertilizer in degradated soil. The treatments were arranged in Randomized Block Design (RBD) with 10 replications. The result showed (until 6 months) that biofertilizer bacteria (PSB) to stimulate avocado growth and diameter were 21.4 persen and 19.1 persen (H: 4.5 cm/month; ф : 0.74 cm/month); durian growth and diameter were 23 persen and 13.2 persen (H: 3.15 cm/month; ф : 0.057 cm/month); sukun growth and diameter were 43.7 persen and 23.8 persen (H: 0.07 cm/month; ф : 0.875 cm/month); and kelewih growth and diameter were 35.7 persen and 27.65 persen (H: 5.8 cm/month; ф : 0.117 cm/month). Which implies that biofertilizer bacteria were advantageous promoting plant growth at marginal soil. Avocado, durian, sukun and kelewih are plant were good to revegated soil degradated. Prosiding seminar Nasional Biologi yang diadakan di fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Pajajaran yang diselenggarakan tanggal 6 desember 2011. ISSN : 2088-0286