Storage effectiveness of cajuput seedcake (Melaleuca cajuputi Powell) to increase the success of post-mining land reclamation

Abstract

Abstract Successful post-mining reclamation using direct seeding is difficult to achieve. Seeds carried by runoff, especially fine seeds (e.g., cajuput), and poor soil conditions limit effective seed germination and establishment of desired plants. Seedcakes containing organic pesticides are emerging as a direct tool to increase reclamation success. Unfortunately, the seedcake manufacturing site is usually far from the mining area. Therefore, it is necessary to know how long the seedcake can be stored as an assumption for the duration of distribution. This study aims to investigate the effects of seedcake storage on seed viability. Seedcake was prepared with water, adhesive, medium, and organic pesticide ingredients with 0, 5, and 10 ml/L concentrations. The organic pesticides were applied by different methods: soaking cajuput seeds with organic pesticide for 20 minutes, mixing organic pesticide with adhesive, and spraying organic pesticide on the seedcake before drying. Seedcakes were formed into 5 cm diameter and 1 cm thickness flat circles. Seedcakes were stored for 0, 7, 14, 21, and 30 days before planting. The results showed that seedcakes can be stored for 30 days; however, the maximum germination rate was the seedcake with 0-day storage and 10 ml/L organic pesticide.