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KAJIAN WATER TABLE PADA SEMAI PEREPAT(Combretocarpus rotundatus Miq dan JELUTUNG ( Dyera lowii Hook) DIINOKULASI Glomus sp 3 DI TANAH GAMBUT Burhanuddin, Burhanuddin; Kabirun, Siti; Radjagukguk, Bostang; Sumardi, Sumardi
Jurnal Penelitian Hutan Tanaman Vol 8, No 3 (2011): JURNAL PENELITIAN HUTAN TANAMAN
Publisher : Pusat Penelitian dan Pengembangan Peningkatan Produktivitas Hutan

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Abstract

PERAN GAMBUT TERHADAP NITROGEN TOTAL TANAH DI LAHAN RAWA [The Role of Peat on Total Nitrogen in The Wetland Soils] Fahmi, Arifin; Radjagukguk, Bostang
BERITA BIOLOGI Vol 12, No 2 (2013)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1236.937 KB) | DOI: 10.14203/beritabiologi.v12i2.536

Abstract

Peatland has important role in wetland ecosystem stability. Depletion and disappearance of peat layer lead to loss of potential source of nutrient and disruption of wetland ecosystem stability. The research aimed to study the influence of peat thickness and land hydrological condition on the total nitrogen (N) content in soil, the influence of rapidly or naturally the depletion and disappear of peat layer on total N content in soil, and the influence of hydrological condition on total N content in soil. Total N was observed in June of 2009 and 2010 (transition from wet to dry season), September of 2009 and 2010 (peak of dry season), and January of 2010 and 2011 (peak of wet season). The research was carried out on potential acid sulphate soil (A), peaty acid sulphate soil (B),shallow peat which all of peat layers wereremoved (C), shallow peat which peat layer was partially removed (D), shallow peat (E), moderate peat (F) and deep peat (G). The results showed that total N content increased with increasing of peat thickness, the depletion and disappearance of peat layer reduced total N content in soil, and declining in the groundwater level increased total N content in soil.
PENGARUH INTERAKSI HARA NITROGEN DAN FOSFOR TERHADAP PERTUMBUHAN TANAMAN JAGUNG (Zea Mays L) PADA TANAH REGOSOL DAN LATOSOL Fahmi, Arifin; Utami, Sri Nuryani H; Radjagukguk, Bostang
BERITA BIOLOGI Vol 10, No 3 (2010)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v10i3.744

Abstract

Nitrogen (N) and Phosphorus (P) are essential nutrients for plant.The deficiency one of these nutrients will be limiting the plant growth.A glass house experiment with one treatment factor was conducted to study the effect and interaction of N and P fertilizers application on maize growth in regosol and latosol soils. The results show that the interaction of N and P fertilizers application(N 1 P 1) on regosol had a significant influence to plant height on 3 to 7 weeks after planting, whilst on latosol had a significant influence to plant height on 1 to 5 weeks after planting. The shoot dry weight, root dry weight and total dry weight of maize on regosols and latosol soils were significantly influenced by the interaction of N and P fertilizers application (N 1 P 1). There were a positive correlation between N and P fertilizers application on both soils types to the total plant dry weight.
PERAN PEMUPUKAN POSFOR DALAM PERTUMBUHAN TANAMAN JAGUNG (Zea mays L.) DI TANAH REGOSOL DAN LATOSOL FahmF, Arifin; Syamsudin, Syamsudin; Utami, Sri Nuryani H; Radjagukguk, Bostang
BERITA BIOLOGI Vol 9, No 6 (2009)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (391.972 KB) | DOI: 10.14203/beritabiologi.v9i6.851

Abstract

Phosphorus (P) is an essential element for plants, deficiency and excess of P in soil will limit plant growth. It is required to applicate P fertilizer in appropriate dosage for promoting plant growth on the soil with different properties. The purpose of experiment was to study the respon of maize (Zea mays L.) for phosphorus fertilization on Regosol and Latosol soils. A glass house experiment was conducted to study maize response on P fertilizer application in Regosol and Latosol soils. The treatment 1was 0, 112, 336, 1008, 3024 and 9072 kg superfosfat ha . P fertilizer tend to increase the biomass of maize but exceed of P fertilizer reduced maize biomass. The optimum fertilization and vailability of P for plant affected by soil properties.
Effect of AMF Inoculation on the Growth of Combretocarpus rotundatus (Miq) on a Peat Soil from Central Kalimantan (For Restoration Ex-Mega Rice Project Central Kalimantan) Burhanuddin, Burhanuddin; Kabirun, Siti; Radjagukguk, Bostang; Sumardi, Sumardi
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 15, No 1 (2010): February 2010
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (483.518 KB) | DOI: 10.24002/biota.v15i1.2649

Abstract

Diperlukan teknik silvikultur dengan memanfaatkan jamur mikoriza arbuskula (JMA) untuk memulihkan hutan rawa gambut yang terdegradasi. JMA berperan penting pada pertumbuhan dan ketahanan hidup pohon-pohonan. Penelitian ini bertujuan untuk mengetahui keberadaan dan bentuk dari JMA di hutan rawa gambut yang sudah terdegradasi pada blok C bekas pengembangan lahan gambut satu juta ha di Kelampangan Kalimantan Tengah. Kondisi lahan hanya ditumbuhi vegetasi jenis-jenis pioner. Contoh tanah diambil dibawah perakaran lima jenis tanaman pioner (Melastoma sp, Combretocarpus sp, Acacia sp, Cratoxylon sp, dan Nephrolepsis sp), kemudian contoh tanah dihitung jumlah spora dengan metode saringan basah. Jumlah spora terbanyak ada di bawah perakaran tanaman Melastoma sp, kemudian Acacia sp, dan Combretocarpus sp. Didapatkan tiga genus JMA: Glomus, Gigaspora, dan Acaulospora. Penelitian di rumah kaca bertujuan untuk mengetahui pengaruh inokulasi JMA jenis Glomus sp TD15, Glomus sp D32, dan Gigaspora sp pada semai perepat (C. rotundatus). Hasil penelitian menunjukkan JMA memberikan pengaruh pada parameter semai yang diukur. Jenis JMA Glomus sp TD15 meningkatkan pertumbuhan semai perepat yang ditunjukkan oleh parameter tinggi semai, diameter semai, dan jumlah daun per tanaman. Pada media gambut semai C. rotundatus sangat tergantung pada asosiasi JMA dalam meningkatkan pertumbuhan tanaman.