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The intensity of the shade and fertilizer are the two aspects of the environment that important for the growth of madeira vine plants. The purpose of the research was to know the growth response of madeira vine on different levels shade and application of fertilizer and Biochar. The research was conducted in the research field of Faculty of Agriculture, Universitas Sumatera Utara, Medan about ± 32 m above the sea, on June to August 2017. This research used Split Plot Design with 2 factors, level of shade (0%; 25%; 50%; dan 75%) and application Fertilizer (without fertilizer; urea 1.6 g/plant; chicken manure 53.3 g/plant; biochar rice husk 294.4 g/plant). This results research showed that without shade (0%) increased the growth of plant length but the 75% shade increased of chlorophyll a, chlorophyll b, and total chlorophyll. Application of chicken manure was increasing plant length, shoot fresh weight but application biochar rice husk increased crop dry weight and leaf area. The interaction of different level shade and application of fertilizer was not significant affecting to the growth madeira vine plant in the end of observation.

Marjenah, Kiswanto, Purwanti S, Sofyan FPM. 2016. The effect of biochar, cocopeat and saw dust compost on the growth of two dipterocarps seedlings. Nusantara Bioscience 8: 39-44. Good growing media contains enough nutrients, light textured, and have the capacity to hold water to create conditions that can support plant growth. The growing media used for propagation has several requirements, that is firm and dense to enhance the growth of stems, has the capability to hold water, guarantee the plant life, and moderate humidity. This study attempts to evaluate the effect of biochar, cocopeat, and saw dust compost on the growth of Dryobalanops aromatica and Shorea balangeran seedlings. An experiment was conducted by using completely randomized block design (CRBD) in factorial with two factors, namely growing media (top soil 100%; top soil 80% + saw dust compost 20%; top soil 80% + biochar 20%, top soil 80% + 20% coco peat ) and two species of dipterocarps seedlings (D. aromatica and S. balangeran). The experiment was carried out in a Forestry Faculty nursery during 3 months. To determine the best growth media, the vegetative parameters of seedlings were measured and the data were statistically analyzed. Survival rates of both of seedlings showed good specification in all types of growing media. The survival rates of D. aromatica for 100% top soil (control); 80% top soil+ 20% sawdust compost; 80% topsoil + 20% biochar; 80% top soil + 20% cocopeat are 100%; 100%; 97.78% and 97.78%; respectively. S. balangeran are 93.33%; 100%; 100%; 97.78%. Quality Index of D. aromatica 100% top soil (control); 80% top soil+ 20% sawdust compost; 80% topsoil + 20% biochar; 80% top soil + 20% cocopeat that are 0.15; 0.14; 0.10; and 0.10; and for S. balangeran 0.09; 0.38; 0.05 and 0.07 respectively.