The decomposition and efficiency of NPK-enriched biochar addition on Ultisols with soybean

Biochar Decomposition Efficiency NPK Ultisols

Authors

  • Sugeng Winarso
    winarsosugeng@unej.ac.id
    Faculty of Agriculture, Jember University, Jember, East Java , Indonesia
  • Marga Mandala Faculty of Agriculture, Jember University, Jember, East Java , Indonesia
  • Hari Sulistiyowati Faculty of Agriculture, Jember University, Jember, East Java , Indonesia
  • Sukron Romadhona Faculty of Agriculture, Jember University, Jember, East Java , Indonesia
  • Bambang Hermiyanto Faculty of Agriculture, Jember University, Jember, East Java , Indonesia
  • Wachju Subchan Faculty of Teacher Training and Education, Jember University, Jember, East Java , Indonesia
December 4, 2019
June 29, 2020
June 29, 2020

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This research aims to compare fresh biochar and NPK-enriched biochar and their decomposition levels and nutrient absorption efficiency in acid soil with soybean. Factorial randomized block design was used in this experiment and consisted of two factors. The first factor, biochar source, comprised four levels: B0: biochar without NPK, B1: rice straw biochar + NPK, B2: soybean straw biochar + NPK, and B3: wood biochar + NPK. The second factor, biochar enrichment, comprised four levels: D1: 0.5 tons ha-1, D2: 2.5 tons ha-1, D3: 5.0 tons ha-1, and D4: 10 tons ha-1. Each treatment was replicated three times, yielding 48 experiment units. The results showed that biochar enrichment with NPK affected the decomposition level. The percentage of increasing decomposition in enriched wood biochar (0.09%) was lower than rice (0.28%) and soybean (0.53%) straw biochar. An increase in NPK absorbance efficiency and soybean dry weight was evident in NPK-enriched biochar. The highest N absorbance efficiency occurred in wood biochar (21%), followed by soybean and rice straw biochar, respectively, while the highest P and K absorbances were found in rice straw biochar (35% and 26%, respectively), followed by wood and then soybean biochar.

How to Cite

Winarso, S., Mandala, M., Sulistiyowati, H., Romadhona, S., Hermiyanto, B., & Subchan, W. (2020). The decomposition and efficiency of NPK-enriched biochar addition on Ultisols with soybean. SAINS TANAH - Journal of Soil Science and Agroclimatology, 17(1), 35-41. https://doi.org/10.20961/stjssa.v17i1.37608