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

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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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (178.613 KB) | DOI: 10.33366/bs.v14i2.340

Abstract

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (177.873 KB) | DOI: 10.33366/bs.v6i2.102

Abstract

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (152.36 KB) | DOI: 10.33366/bs.v6i1.89

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (141.836 KB) | DOI: 10.33366/bs.v6i1.90

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