SUBSTITUSI AGENS BIOKONTROL DAN DEKOMPOSER UNTUK MENGENDALIKAN PENYAKIT ABIOTIK DAN PATOGEN TOLAR TANAH PADA MEDIA SAPIB STEK PUCUK JATI (Tectona grandis L.f)

PRAWIDA TEDY HANANTO, Ir. Sumardi, M.For.Sc. ; Dr.Ir. SM. Widyastuti, M.Sc.

2003 | Skripsi | S1 KEHUTANAN

Growth medium in nursery plays an important role in facilitating growth and development of seedling. Best medium have medium to coarse texture, neutral reaction, no nutrient defisiency and good cation exchange. capacity. Practically few sites has optimal edaphic attributes, and soil management practices are normally applied to ensure rapid growth and healthty seedling. The experiment aimed to evaluate the effect of medium amelioration through compost substitution and application of Trichoderma as biological agent to seedling growth enhancement health. Two kind of composts used for substitution each with dung manure and cane pulp as the basic materials and both were decomposted using fresh cmv dung as the decomposer. Trichoderma was applied in pellet formulation developed by the Laboratory of Forest protection, Faculty of Forestry. All treatments were arranged in completely randomized block desi!:,"11 with tree replicates. Results showed significant increment on seedling growth due to compos substitution, indicated increased growth survival of seedlings on medium A2, seedling height on medium K2A2, diameter on medium K1A2, root length on medium K2A2, shoot-root ratio on K2A2 at the percentages of 1.6%, 1.16%, 4.05%, 1,89%, and 2.24% respectively compared to the original medium K1A1. Addition of biological agent Trichoderma reesei on growth medium increased growth survival, height, soundness, root length and dry weight of seedlings 6.68%, 0.271%, 4.51 20.04%, and 20.64% respectively, though no significant effect was noted on some abiotic symptom of seedling.

Kata Kunci : Trichoderma reesei, Tectona grandis, biological agent, Growth medium