Plant Growth, Biomass Production, and Nutrient Profile of <i>Centrocema pubescens</i> Under Different Fertilization Doses in Post-lime Mining Reclamation Land

Abstract Post-lime mining reclamation land is a potentially feasible medium to grow forage plants through a long-term reclamation process. Centrocema pubescens is one of promising protein-source plants for land restoration after mining. This study aims to determine the effect of organic and NPK fertilizers at different doses on the productivity and nutrient profile of C. pubescens planted in post-lime mining reclamation land. A factorial randomized block design (3x4) with four replications was utilized. The first factor was three parts of organic fertilizer of 0, 5, and 10 tons ha -1 . The second factor was four parts of NPK fertilizer of 0, 50, 100, and 150 kg ha -1 . The defoliation was carried out up to three harvests. The results showed an interaction between organic and NPK fertilizers on plant growth and fresh biomass. The combination of 10 tons ha -1 organic and 100 kg ha -1 NPK fertilizers significantly (P&lt;0.05) produced plants with up to 197.00 cm height, 9.56 tons ha -1 fresh biomass, and 21.68% crude protein of Centrocema pubescens . This combination is efficient for restoration, allowing sustainable forage plants on post-lime mining reclamation land. Conclusively, the combination of 10 tons ha -1 of organic fertilizer and 100 kg ha -1 of NPK fertilizer optimally increases plant height, fresh biomass, and crude protein of Centrosema pubescens planted on post-lime mining reclamation land.