Abstract
Acacia mangium is one of the vegetation that can growth on dystropepts, but its growth has not shown the right quantity and quality. This is caused by the deficient nutrient in dystropepts. To increase productivity can add soil conditioners. The purpose of this research was to obtain an effective soil conditioner for acacia growth in dystropepts. This experimental research using complete randomized design. Factors studied were K = Control, A= Bacteria 10 gr, B = Trichoderma 10 gr, C = Mycorrhiza 40 gr, D = NPK fertilizer 20 gr, and E = Manure 200 gr. Dystropepts soil used as much as 1,000 gr for each treatment. Each treatment is repeated 5 (five) times. The observation variables consisted of height and number of leaves. The results showed that the treatment of adding conditioner significantly affected the growth of acacia seedlings in dystropepts. The addition of trichoderma is the best treatment for increasing seedling height (3.0) and number of leaves (7.4). Soil conditioners from microbes and fertilizers are effective for stimulating the growth of acacia seeds in dystropepts.
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