Uji Efektivitas Mikoriza Arbuskula Terhadap Pertumbuhan Bibit Sengon (Paraserianthes falcataria), Akasia (Acacia mangium) dan Suren (Toona surenii) pada Tanah Marginal

Abstract

SONDANG R. PARHUSIP: Effectiveness Test of Arbuscular Mycorrhizal on The Seedlings Growth of Sengon (Paraserianthes falcataria), Acacia (Acacia mangium) and Suren (Toona surenii) on Marginal Land, guided by DELVIAN and DENI ELFIATI. The objective of this research was to test the effectiveness of arbuscular mycorrhizal on the growth seedlings of sengon (Paraserianthes falcataria), Acacia (Acacia mangium) and Suren (Toona surenii) by adduction arbuscular mycorrhizal fungi (AMF) with different doses. The research was conducted in the green house of the Faculty of Agriculture, University of Sumatera Utara. This research used a factorial completely randomized design with 2 factors that mycorrhizal doses (0 g / seed, 10 g / seed, 20 g / seed, and 30 g / seed) and spesies (sengon, acacia, and suren). The parameters measured were plant height, stem diameter, leaves number, root colonization percentage, total dry weight, root crown ratio and P absorption in the canopy. The results showed that the interaction between doses of mycorrhizal and spesies of plants significantly affect to percentage average increase in diameter and root colonization. The use of AMF significantly affect to height, diameter, leaves number, root colonization percentage, and total dry weight but did not significantly affect to the ratio of crown roots and P absorptions. Different spesies of plants showed a different growth. The b