Post-Tin-Mining Agricultural Soil Regeneration Using Local Organic Amendments Improve Nitrogen Fixation and Uptake in a Legume–Cassava Intercropping System

Rizki Maftukhah, Katharina M. Keiblinger (), Ngadisih Ngadisih, Murtiningrum Murtiningrum, Rosana M. Kral, Axel Mentler and Rebecca Hood-Nowotny
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Rizki Maftukhah: Institute of Soil Research, Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences Vienna, 1190 Vienna, Austria
Katharina M. Keiblinger: Institute of Soil Research, Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences Vienna, 1190 Vienna, Austria
Ngadisih Ngadisih: Department of Agricultural and Biosystem Engineering, Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia
Murtiningrum Murtiningrum: Department of Agricultural and Biosystem Engineering, Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia
Rosana M. Kral: Institute for Development Research, Department of Sustainable Agricultural System, University of Natural Resources and Life Sciences Vienna, 1190 Vienna, Austria
Axel Mentler: Institute of Soil Research, Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences Vienna, 1190 Vienna, Austria
Rebecca Hood-Nowotny: Institute of Soil Research, Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences Vienna, 1190 Vienna, Austria

Land, 2023, vol. 12, issue 5, 1-17

Abstract: The low nitrogen content of Bangka Island’s post-tin-mining soil may limit its suitability for agricultural production. In this study, we investigated the effect of locally available organic soil amendments on nitrogen fixation (N 2 –fixation) and crop nitrogen (N) uptake in a cassava–legume intercrop system. Cassava was intercropped with centrosema in post-tin-mining soils with six treatments, including a control and different soil amendments, such as dolomite, compost, charcoal, a combined treatment of charcoal and compost, and a combined treatment of compost and sawdust. The percentages of N derived from N 2 -fixation (%Ndfa) with the different seasons and treatments were comparable. Nonetheless, due to the higher shoot biomass accumulation, the mass of N 2 –fixation in soil amended with compost and when combined with charcoal was significantly higher than the control (50 to 73 kg ha −1 ). Treatments with compost and its combination with charcoal exhibited higher N uptake from the cassava–centrosema intercropped system (82 and 137 kg ha −1 ) and higher inorganic ammonium (NH 4 + ) concentrations in the soil at harvest time (5.5 and 6.7 µg g −1 ). When combined with organic soil amendments, N 2 –fixation from centrosema produces not only higher biomass, but also higher N contribution to the system. Overall, locally available organic amendments, particularly the combined application of charcoal and compost, showed promise for improving N 2 –fixation of intercrop centrosema as well as for increasing N availability in the soil, which is of critical importance for crop growth in post-mining soils that have lost fertility.

Keywords: legume; mining; Bangka Island; soil amendment; intercropping; nitrogen fixation (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2023
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