Phosphate (P) and potassium (K) solubilizing bacterial isolates has been isolated from soil in mining limestone Cirebon (Mubarik et al. 2014). These bacteria were selected, blended, and packaged together into biological fertilizer product. The use of biological fertilizers on seedling plants can replace synthetic chemical fertilizers. Phosphate and potassium solubilizing bacteria have the ability to produce a substance that dissolves the compound P and K bound contained in the soil, so that it becomes available to plants and can replace synthetic fertilizers (chemical) P and K. Nitrogen-fixing bacteria ( N) can reduce the use of urea fertilizer. Mined land limestone can be used as an area planting phytoremediation and binding of dust plants, such as Leucaena (Leucaena leucocephala) and Pterocarpus (Pterocarpus indicus) with applying the bacteria as biological fertilizer. Applications bacterial consortium can provide nutrients for the plants grown on the ex-mining limestone quarry and is an attempt for rehabilitation of degraded lands.

Planting phytoremediation plants in the Hambalang reclamation area

On May 23-25 2016, we planted three phytoremediation plants such as lamtoro (Leucaena leucocephala), trembesi (Albizia saman), and angsana (Pterocarpus indicus) in Hambalang reclamation area. There are three plots treatment area: ripping, without ripping, and ripping added with compost and biofertilizer. One day after planting, we measured the height of plant, diameter of trunk, covering area of vegetation, abundance of soil bacteria, and characteristic of soil in the plots.

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Vegetation analysis on ex-mining area at Hambalang

Vegetation analysis on ex-mining area is done before planting

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