Heri Junedi
Study Program of Agroecotechnology, Faculty of Agriculture, University of Jambi Kampus Pinang Masak, Jalan Raya Jambi-Muaro Bulian Km 15 Mendalo Darat Jambi 36361, Indonesia

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Managing Actual Problems of Peatsoils Associated with Soil Acidity Armanto, M Edi; Imanudin, M.S.; Wildayana, Elisa; Junedi, Heri; Zuhdi, Mohd.
Sriwijaya Journal of Environment Vol 1, No 3 (2016): Biodiversity
Publisher : Program Pascasarjana Universitas Sriwijaya

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Abstract: The research objective is to manage actual problems of peatsoils associated with soil acidity. The research has been conducted on peatsoils in river backswamps located in Subdistricts of East Pedamaran and Pedamaran, District of OKI South Sumatra. Soil sampling was taken in cultivated and uncultivated types of landuse; cultivated peatsoils consist of Site A (intercropping between oil palm and pineapple) and Site B (oil palm), uncultivated peatsoils are divided into Site C (peat forest), Site D (swamp bush) and Site E (swamp grass). The research resulted that actual problems of soil acidity is associated with base saturation, cations exchange capacity, soil organic matters and C/N ratio, balances of soil nutrients, and toxicity potency. The climatic condition and drought can accelerate the occurrence of actual problems of peatsoils associated with acidity peatsoils. Some ameliorant have been applied in order of importance in the fields, namely lime/dolomite, mineral soils, organic fertilizers, combustion ash, and volcanic ash. Application of ameliorant materials is capable to minimize the actual problems of peatsoils associated with soil acidity.Keywords: Managing, actual problems, peatsoils, acidityAbstrak (Indonesian): Tujuan penelitian ini adalah untuk mengelola masalah aktual tanah gambut yang terkait dengan keasaman tanah. Penelitian ini telah dilakukan pada tanah lebak gambut yang terletak di Kecamatan Pedamaran Timur dan Pedamaran, Kabupaten OKI Sumatera Selatan.  Contoh tanah diambil berdasarkan jenis penggunaan lahan; untuk tanah gambut yang digarap dibagi menjadi Site A (tumpang sari antara kelapa sawit dan nanas) dan Site B (kelapa sawit), tanah gambut tidak digarap dibagi menjadi Site C (hutan gambut), Site D (rawa semak) dan Situs E (rumput rawa). Hasil penelitian menunjukkan bahwa masalah aktual keasaman tanah dikaitkan dengan kejenuhan basa, kapasitas kation tukar, bahan organik tanah dan C/N rasio, keseimbangan nutrisi tanah, dan potensi toksisitas. Kondisi iklim dan kekeringan dapat mempercepat terjadinya masalah aktual tanah gambut yang terkait dengan keasaman tanah.  Amelioran yang telah diterapkan, yaitu kapur/dolomit, tanah mineral, pupuk organik, abu pembakaran, dan abu vulkanik. Bahan amelioran mampu meminimalkan masalah-masalah aktual tanah gambut yang terkait dengan keasaman tanah.Kata kunci: Mengelola, masalah aktual, tanah gambut, keasaman
PEMANFAATAN KOMPOS KOTORAN SAPI DAN ARA SUNGSANG UNTUK MENURUNKAN KEPADATAN ULTISOL Junedi, Heri; Mahbub, Itang Ahmad; Zurhalena, .
Jurnal Penelitian Universitas Jambi: Seri Sains Vol 15, No 1 (2013)
Publisher : Jurnal Penelitian Universitas Jambi: Seri Sains

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The Effect of compost made by cow manure and Israel grass on soil penetration resistance of Ultisol (Heri Junedi, Itang Ahmad Mahbub, Zurhalena). The aim of this research was to study the effect of compost made by cow manure and Israel grass on soil penetration resistance of Ultisol. The experiment was carried out at Experimental Field of Agricultural Faculty, University of Jambi, Mendalo Darat Jambi, from May to November 2012. The treatments were arranged in a randomly blocked design consisting of, control (no compost),  5 ton ha-1 compost, 10 ton ha-1 compost, 15 ton ha-1 compost, and  20 ton ha-1 compost. The result of study showed that compost can significantly decrease soil penetration resistance of Ultisol. The higher compost dosage, the lower soil penetration resistance. Keywords: compost, soil penetration resistance, Ultisol
Changes to Some Physical Properties due to Conversion of Secondary Forest of Peat into Oil Palm Plantation Junedi, Heri; Armanto, M Edi; Bernas, Siti Masreah; Imanudin, Momon Sodik
Sriwijaya Journal of Environment Vol 2, No 3 (2017): Low Land
Publisher : Program Pascasarjana Universitas Sriwijaya

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The purpose of this study was to study how the physical properties of peat change due to the conversion of secondary forest into oil palm plantations.  It was done by comparing the three conversion stages of the secondary forest into shrubs and oil palm plantations.  The study was conducted in Ogan Komering Ilir District, South Sumatera Province, about 100 km south of Palembang, Indonesia from August to December 2016.  Data collection was done randomly at all sites, each of five points for field sampling, observation of soil profile and measurement of hydraulic conductivity and water table depth.  The samples were collected at a depth of 0-30 cm, both for undisturbed cores and bulk samples.  The hydraulic conductivity was measured in the field using the auger holes method.  The peat strength was determined by using the hand operated cone penetrometer.  Data analysis was done descriptively and regression correlation test.  The results showed that conversion of secondary forests into oil palm plantations has led to the decline in the quality of some of the physical properties of peat by decreasing total porosity, water table depth, hydraulic conductivity, organic matter content, moisture content and increasing the bulk density and peat strength.
Characterizing and Analyzing Sonor System in South Sumatra Tidal Wetlands Wildayana, Elisa; Armanto, M. Edi; Imanudin, M.S.; Junedi, Heri
Journal of Wetlands Environmental Management Vol 5, No 2 (2017): July-December 2017
Publisher : Center for Journal Management and Publication

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The research aimed to (1) describe changing biomass during the burning process, (2) characterize the nutrient loss due to biomass burning, (3) analyse the financial loss of nutrient transfer, and (4) compare farmer’s income among three land typologies. This research was conducted in tidal wetlands Talang Sepucuk, OKI District, South Sumatra with a slope of 0-3 %. Three selected land typologies (B, C and D) are located in the area adjacent to one another with distance < 1.200 m. The natural vegetation data and paddy yields was recorded by squares method, i.e. 25 x 25 m at each study site, dried and weighed and analyzed in the laboratory. The research resulted that the nutrient transfer due to biomass burning was in range of Rp 49.98-51.62 Mills/ha/year. The farmer’s income of the sonor system was very small (Rp 3.61-3.97 Mills/ha/year), it was only about 7 % of the total financial loss of nutrient transfer). The remaining value (93 %) is beyond the capacity of farmers to harvest natural resources. This value (93 %) is classified as one of the biggest negative impact of the sonor system to be paid by the all people. The government must intervene to make the public policy by giving direct subsidy to farmers NOT to burn biomass in the sonor system with compensation of at least 2 (two) times of farmer’s income from the sonor system (around Rp 7.66 Mill. Rp/ha/year). If farmers still continue to apply the sonor system by using fire, then there is very little opportunity for us to manage the nutrients loss due to biomass burning. The preventive and proactive approach is the best way how to manage the land resources.
Selected Properties of Peat Degradation on Different Land Uses and the Sustainable Management Armanto, M. Edi; Wildayana, Elisa; Imanudin, M.S.; Junedi, Heri; Zuhdi, Mohd.
Journal of Wetlands Environmental Management Vol 5, No 2 (2017): July-December 2017
Publisher : Center for Journal Management and Publication

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Abstract

The research aimed to analyze selected properties of peat degradation on different land uses and the sustainable management. The research area is located in the lowland dome peats in the catchment basin of Sibumbung River and Sibotak River in Sub District of East Pedamaran, OKI South Sumatra. The research method used an experimental design of Randomized Completely Block Design with two Blocks and five treatments (Site A: intercropping between oil palm and pineapples; Site B: oil palm plantations, Site C: peat forest; Site D: swamp bush; Site E: swamp grass). The research resulted that drainage and land uses decrease some properties of peats, namely C/N ratio, total pore space, fiber and ash content as well as organic C on cultivated peats and are significantly different at level of 5% compared with uncultivated peats. Bulk density increased due to peat compaction and groundwater table on cultivated peats, which is getting deeper, and significantly different compared with uncultivated peats. All soil series do not show any change because of drainage and different land uses. Sustainable peat management can be implemented through three approaches, namely managements of water, soil and crops.