Pemberian Inokulan Campuran Beberapa Cendawan Mikoriza Arbuskula pada Kacang Tanah dan Kedelai
(The Application of Mixed Arbuscular Mycorrhizal Fungi Inoculant to Peanut and Soybean)
M. RAHMANSYAH & SUCIATMIH
Puslitbang Biologi LIPI, Jln. Ir. Juanda, Bogor 16122 ; Tel. 062-251-324006, Faks. 062-251-325854
Glomus sp.4, as arbuscular mycorrhizal (AM) fungi, was a collection originally gathered from soil in Bogor and had been introduced succesfully to fast-growing legumes of Albizia procera, Paraserianthes falcataria and pterocarpus indicus seedlings. To determine the influence of AM fungi inoculation to the plant growth, the experiment was set up as follow, a. Glomus sp.4 was mixed with G. etunicatum, G. manihotis and G. microagregatum+acaulospora spinosa, and inoculated separately as A, B, and C soil culture inoculant.; b. peanut and soybean were inoculated and planted as pot experiment in mixed medium of soil, compost and sand (2:1:1); c. for controlling treatments the plants were not inoculated and the other one were planted at medium which was amanded with 100g/kg TSP. As plant growth, AM fungi colonies of both plants roots increased. Fungi infection were founded higher in soybean (50-90%) compared to peanut infection (40-70%). Peanut shoot dryweight (15.6 g) and index of seed over shell (1.01) whiwh were harvested 53 days after planting (DAP) showed value as caused by B inoculant. Soybean plants at 45 DAP were significantly different in shoot dry weight (2.08 g) and seed weight plant-1 (4.12 g) compared with control, as caused of C inoculant treatment. Phosphorus content in dry shoot of peanut treated with B inoculant was 0.3%, and soybean which C inoculant was 0.4%.
Key word: inoculant, arbuscular mycorrhizal fungi, peanut, soybean
