Growth and Yield of Sorghum with The Application of Waste and NPK Fertilizer in Post-Tin Mining Land
Keywords:
Sorghum, NPK fertilizer, Post-Mining Land, Waste blockAbstract
Sorghum is a food and fodder crop that can be cultivated in post-tin mining areas. The low nutrient availability in post-tin mining areas can be optimized by applying waste and NPK fertilizer. This study aims to determine the effect of waste and NPK fertilizer on the growth of sorghum plants in post-tin mining areas. This study was conducted from September 2024 to February 2025 in Air Jangkang Reclamation Village, Merawang District, Bangka Regency. This study used an experimental method with a one-factor randomized block design, with 6 treatments and 4 replications. The treatments consisted of NPK fertilizer doses, namely treatment P1 (waste + 150% NPK fertilizer), treatment P2 (waste + 100% NPK fertilizer), treatment P3 (waste + 50% NPK fertilizer), treatment P4 (block waste + 150% NPK fertilizer), treatment P5 (block waste + 100% NPK fertilizer), and treatment P6 (block waste + 50% NPK fertilizer). The results of the study showed that the application of waste and NPK fertilizer to post-tin mining land had a very significant effect on root wet weight, root dry weight, seed weight, and had a significant effect on root length, but had no effect on plant height, number of leaves, and stem diameter. Application of block waste and NPK fertilizer at a dose of 50% showed the highest average effect on sorghum plant vegetative growth in parameters of plant height, number of leaves, and stem diameter. Application of block waste can increase nutrient absorption, thus enabling optimal growth of sorghum plants in post-tin mining land.
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