Application of elicitors to reduce NPK fertilizer in Pakchong grass cultivation on post-tin mining land

Elicitors in the form of a material made from a solution of grass plants. This study focuses on elicitors as an innovation that supports the reduction of chemical fertilizers. The low nutrient content and sandy soil texture of post-tin mining land can be optimized by cultivating Pakchong grass. This research aimed to determine the growth and yield of Pakchong grass by applying elicitors to reduce NPK fertilizer use. The research was carried out from March 2024 to August 2024. The research location was in Dwi Makmur Village Merawang District, Bangka Regency. This research used an experimental method with a randomized block design (RBD) consisting of 5 treatments and 6 blocks. The treatments were: elicitors alone (P1), elicitors + NPK 25 % (P2), elicitors + NPK 50 % (P3), elicitors + NPK 75 % (P4) and elicitors + NPK 100 % (P5). The research results showed that the provision of elicitors + NPK significantly affected plant height, number of tillers and yield per plot. Applying elicitors in Pakchong grass cultivation on post-tin mining land can reduce NPK use by 50 %. The elicitors from the research area contained phenolic secondary metabolites, which enable plants to absorb nutrients more effectively. The application of elicitors can reduce the metal Pb content in Pakchong grass on post-tin mining land.