Handayanto, E.
IRC-MEDMIND, Universitas Brawijaya, Jl. Veteran No1, Malang 65145

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Potensi Pohon Lokal untuk Fitostabilisasi Logam Berat pada Tanah Tercemar Limbah Sianidasi Emas di Lombok Barat Handayanto, E.; Krisnayanti, BD; Muddarisna, N
Jurnal Lahan Suboptimal Vol 4, No 1 (2015): JLSO
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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The discharge of mercury amalgamation and cyanidation tailings of small-scale gold mining in West Lombok to agricultural lands caused Hg, Cd, Cu, Pb and Zn contamination. Phytostabilization may be a feasible approach for the management of contaminated sites. The objective of this study was to search for tree species that are potential for phytostabilization of soils contaminated by small-scale gold mine tailings in West Lombok, Indonesia. Results of this study showed that there were at least 28 tree species found in areas contaminated by gold cyanidatation tailing. Based on cyanide concentration, Hg concentration, and energy of above-ground parts of the identified plants, Duabanga moluccana (DM), Erythrina orientalis (DM)., and Paraserianthes falcataria (PF) were selected to study their phytostabilization potential. Results of plant growth experiment showed that the tolerance of the three species to heavy metals was in the order of Zn > Pb > Cu > Cd. The highest concentration of Cd (0.9 mg/kg) was found in the roots of DM. The highest concentration of Cu (37,7 mg/kg) was found in roots of EO. Roots of PF contained the highest concentrations of Pb (37.7 mg/kg) and Zn (546 mg/kg). The three plant species had metal shoot / metal root ratios of less than one. This indicates that Duabanga moluccana, Paraserianthes falcataria, and Erythrina orientalis are suitable for phytostabilization of Cu, Pb, Cd, and Zn in gold cyanidation tailing contaminated soils of West Lombok, Indonesia
PENGARUH KOMPOS DIPERKAYA BIOCHAR SEBAGAI BULKING AGENT TERHADAP SERAPAN FOSFOR DAN HASIL JAGUNG (ZEA MAYS, L.) PADA CALCAROSOL Nur, M.S.M; Islami, T.; Handayanto, E.; Nugroho, W.H.; Utomo, W.H.
BUANA SAINS Vol 14, No 2 (2014)
Publisher : Universitas Tribhuwana Tunggadewi

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Suatu penelitian lapangan dilakukan untuk mempelajari pengaruh aplikasi kompos yang diperkaya dengan biochar sebagai bulking agent terhadap serapan fosfor dan hasil jagung pada tanah Calcarosol pada musim hujan 2012-2013 dan musim panas 2013. Perlakuan yang dicobakan adalah: (1) kontrol, tanpa pemberian kompos (K0), (2) kompos pupuk kandang sapi (KSB0), (3) kompos pupuk kandang sapi + 2,5 ton ha-1 biochar (KSBOB), (4) kompos pupuk kandang sapi + biochar (3:1) (KSB1), (5) kompos pupuk kandang sapi + biochar (1:1) (KSB2), (6) kompos biomasa C. odorata (KCB0), (7) kompos biomasa C. odorata + biochar (3:1) (KCB1), dan (8) kompos biomasa C. odorata +biochar (1:1) (KCB2). Hasil percobaan menunjukkan bahwa aplikasi kompos biochar sebagai pembenah tanah Calcarosol berpengaruh nyata terhadap peningkatan C-organik, KTK, N total, K-dd, Mg-dd, P tersedia, penurunan P terjerap, peningkatan serapan P, peningkatan bobot kering akar, bobot kering tanaman, dan hasil biji jagung. Peningkatan serapan P dan hasil biji tertinggi diperoleh pada perlakuan KCB2, yaitu masing-masing sebesar 162% dan 145% dibanding kontrol pada MT I dan sebesar 182% dan 240% dibanding kontrol pada MT II, menunjukkan efektivitas pengaruh perlakuan kompos biochar terhadap serapan P dan hasil jagung pada tanah Calcarosol
SERAPAN NITROGEN DARI PANGKASAN POHON LEGUM OLEH TANAMAN PANGAN PADA SISTEM BUDIDAYA PAGAR Nuraini, Y.; Handayanto, E.
BUANA SAINS Vol 6, No 2 (2006)
Publisher : Universitas Tribhuwana Tunggadewi

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A study to test the recovery of nitrogen released from five legume tree prunings (Calliandra calothyrsus, Peltophorum dasyrrachis, Gliricidia sepium, Leucaena leucocephala, and Flemingia congesta) was carried out in a glasshouse for 7 weeks. Results showed that the amounts of mineral-N in the soil receiving legume tree prunings ranged from 20 mg/kg soil (Peltophorum) to 37 mg/kg soil (Gliricidia). Addition of Gliricidia produced significantly (P
MANFAAT BIOMASA TUMBUHAN LOKAL UNTUK MENINGKATKAN KETERSEDIAAN NITROGEN TANAH DI LAHAN KERING MALANG SELATAN Dewi, E. K.; Handayanto, E.
BUANA SAINS Vol 6, No 1 (2006)
Publisher : Universitas Tribhuwana Tunggadewi

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Abstract

A research that was aimed to study the possible use of Mucuna pruriens, Psophocarpus tetragonolubus, Phaseolus lunatus, Dolichos lablab biomass as sources of local organic matters to improve soil fertility, and growth of maize on a Typic Tropaquent of South Malang. Six treatments, i.e. Mucuna pruriens, Psophocarpus tetragonolubus, Phaseolus lunatus, Dolichos lablab, Urea, and Control (no added legume biomass and fertilizers), were arranged in a Randomized Block Design with three replicates. Results of the study showed that the highest increase of soil N was due to addition of Phaeseolus, followed by Dolichos, Mucuna, and Psophocarpus. Application of Dolichos, Phaseolus, Psophocarpus and Mucuna could substitute 66%, 36%, 30% and 28% of N supplied by urea, respectively. The percentage of N urea recovered by maize was only 23,60%, while Dolichos and Phaseolus treatments resulted in 29,60% and 24,80% N recovery
PELEPASAN NITROGEN DARI PANGKASAN POHON LEGUM PADA SISTEM BUDIDAYA PAGAR Nuraini, Y.; Handayanto, E.
BUANA SAINS Vol 6, No 1 (2006)
Publisher : Universitas Tribhuwana Tunggadewi

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Abstract

Decomposition and nitrogen mineralization of prunings from five species of legume hedgerow trees (Calliandra calothyrsus, Peltophorum dasyrrachis, Leucaena leucocephala, Gliricidia sepium, and Flemingia congesta) in relation to the pruning quality and methods of pruning application were studied in a laboratory and in the field. N mineralization of the prunings was tested upon application to the soil in a laboratory under controlled leaching and non-leeching conditions over the period of 14 weeks. The absolute decomposition rates of the prunings was measured using litterbags placed randomly on the soil surface or incorporated in the soil in the field over the period of 8 weeks. The results showed that the contribution of decomposing pruning materials to the soil was not only associated with their quality and with the leaching conditions, but also with the method of application of the prunings in the field. The decomposition and N release rate constants of the prunings declined in the order of Gliricidia> Leucaena > Flemingia > Calliandra > Peltophorum for all experiments carried out. The effect of quality of N release from legume prunings was modified by leaching conditions. Where there was no leaching, the protein-binding capacity of polyphenols in the prunings can play an important role in controlling the rate of N release. Under leaching conditions, the combined (lignin + polyphenol)/N ratio became an important quality factor in affecting the N release. The amounts of N released from the prunings placed on the soil surface were much smaller than those released from the incorporated prunings