Papers by Dr. Ir. Wiwik Ekyastuti, M.Si
Jurnal Hutan Lestari: Jurnal Penelitian Kehutanan, Nov 16, 2023
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Jurnal Hutan Lestari: Jurnal Penelitian Kehutanan, Mar 15, 2023
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Biodiversitas Journal of Biological Diversity
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IOP Conference Series: Earth and Environmental Science
Open-abandoned peatland commonly were not hydrologically well-managed in West Kalimantan causing ... more Open-abandoned peatland commonly were not hydrologically well-managed in West Kalimantan causing continuous degradation of peat ecosystems, due to peat drying. This condition damage the carbon balance and function of tropical peatlands, result in significant greenhouse gas emissions. Tropical peat in the Kubu Raya District of West Kalimantan, which has a relatively large area of peat, has been degraded due to uncontrolled drainage and land fires caused by lack of management post the landcover changes. This study aims to clarify the partition of carbon loss in open peatlands due to the heterotrophic respiration (CO2 emission) process, which is part of the declining peat layer due to subsidence. The CO2 emission and subsidence assessments were accomplished for two years. The results show an increase in peat CO2 emissions to ~300% when groundwater level (GWL) lowered from ~0-5cm to >80cm. The trend is similar to the subsidence process due to changes in GWL. Carbon dioxide emissions ...
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Jurnal Hutan Lestari: Jurnal Penelitian Kehutanan, Jun 16, 2022
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IOP Conference Series: Earth and Environmental Science
Litsea garciae Vidal. (engkala, kalangkala) is a fruit-producing plant useful as a potential medi... more Litsea garciae Vidal. (engkala, kalangkala) is a fruit-producing plant useful as a potential medicinal plant and food. The availability of seedlings is a must if their potential is to be developed. The study aimed to evaluate the formation and growth of roots and shoots of L. garciae shoot cuttings in response to growth regulators and arbuscular mycorrhizal fungi (AMF) inoculation. The study used a factorial experiment with a completely randomized design. The treatments tested were growth regulators (without and with rootone-F) and AMF inoculation (without and with AMF). The shoot cuttings were planted in a mixture of cocopeat and husk charcoal (2:1 v/v) and placed in a propagation box in a screen house for 12 weeks. The live percentage, the percentage of callus cuttings, the percentage of rooted cuttings, and the percentage of cuttings sprouting all shoot cuttings planted reached 100%. The interaction between rootone-F and AMF had no significant effect on initiating root and shoot ...
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JMM (Jurnal Masyarakat Mandiri)
Abstrak: Desa Malikian Kecamatan Mempawah Hilir, Kabupaten Mempawah adalah salah satu desa pengha... more Abstrak: Desa Malikian Kecamatan Mempawah Hilir, Kabupaten Mempawah adalah salah satu desa penghasil kelapa di Kalimantan Barat. Selama ini kelapa diolah menjadi kopra, dengan nilai jual yang rendah. Sementara jika kelapa diolah menjadi virgin coconut oil (VCO) harga jual akan meningkat 5-12 kali lebih tinggi dari kopra. Kegiatan pengabdian ini bertujuan untuk meningkatkan pengetahuan dan keterampilan masyarakat dalam membuat VCO untuk diversifikasi produk minyak kelapa, sehingga berpotensi meningkatkan pendapatan. Metode yang digunakan adalah pelatihan dengan tahapan: penyampaian materi, diskusi, dan praktek langsung membuat VCO. Mitra sebagai peserta pelatihan adalah ibu-ibu anggota PKK yang berjumlah 25orang. Hasil evaluasi menunjukkan bahwa kegiatan pelatihan diterima positif oleh mitra. Pengetahuan dan keterampilan masyarakat dalam membuat VCO meningkat 76,5% dari 21,5% sebelum pelatihan menjadi 98% setelah mengikuti pelatihan. Jika masyarakat konsisten melakukan diversifikasi ...
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JURNAL HUTAN LESTARI
Kembang telang leaf extract is antimicrobial controlling pathogenic fungi in vitro. The purpose o... more Kembang telang leaf extract is antimicrobial controlling pathogenic fungi in vitro. The purpose of the study was to determine the ability of the kembang telang leaf extract as an inhibitor of the growth of fungi that cause root rot and the concentration of the extract that was most effective. The research was carried out in the Silviculture laboratory Faculty of Forestry Universitas Tanjungpura for three months. The experimental method used a completely randomized design with treatments consisting of four concentrations, namely 0%, 3%, 6%, and 9%, with three replications. Telang flower leaf extract can inhibit Ganoderma sp. An inhibition zone looks more apparent than the Telang flower leaf extract area. The growth of fungal growth at the lowest concentration of 3% is the same as effectively inhibiting the growth of Ganoderma sp. The research results imply that the flower telang leaf extract has the potential as an antifungal against the Ganoderma sp. Keywords: antimicrobial, ex...
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IOP Conference Series: Earth and Environmental Science
Tailings of ex-gold mines leave several environmental damage problems. Environmental damage cause... more Tailings of ex-gold mines leave several environmental damage problems. Environmental damage causes disruption of microorganisms including bacteria. The revegetation of ex-gold mine tailings in Menjalin sub-district, Landak district, West Kalimantan has begun by local communities using agricultural crops. Women as farmers have an important role in the tailing revegetation process using agricultural crops. Therefore, women can help improve the tailings ecosystem as well as the family economy. The objective of the study was to detect the presence and density of bacterial populations in the rhizosphere of the revegetation crops. The research was conducted by survey method. Soil samples were taken compositely from the rhizosphere of four species of agricultural crops cultivated in tailings, i.e: Capsicum frutescens L., Solanum melongena, Ipomoea batatas L., and Manihot utilissima. The results showed that soil bacteria found growing well in the rhizospheres of four species crops. Two gene...
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Jurnal Hutan Lestari: Jurnal Penelitian Kehutanan, Jun 17, 2022
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Jurnal Hutan Lestari: Jurnal Penelitian Kehutanan, Dec 14, 2022
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Biodiversitas Journal of Biological Diversity
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JURNAL HUTAN LESTARI
This research aims to identify and obtain data on morphological characteristics of bamboo in the ... more This research aims to identify and obtain data on morphological characteristics of bamboo in the Engkadik Pade Village Forest of Air Basar District of Landak Regency. The study was conducted for 3 weeks in the field, using the survey method (cruising), data retrieval techniques by creating contour cutting paths, the laying of the first path is done intentionally or purposive sampling, The area of observation is 1 ha. Based on data obtained in the field there are 7 species of bamboo from 4 bamboo genera found. Bamboo munti (Gigantochloa hasskarlaiana), bamboo buluh and bamboo kuning (Schizostachyum brachyladum), bamboo pasa (Schizostachyum flexuosum), bamboo tarek (Gigantochloa levy), bamboo anyang (Dendrocalamus hirtellus), and bamboo batu (Dinochloa sp). The morphological characteristics of bamboo in Engkadik Pade village forest have their own uniqueness and have differentiators of each species, among them bamboo pasa (S. flexuosum) has a small stem and smelt with wavy cheese feath...
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Jurnal Hutan Lestari: Jurnal Penelitian Kehutanan, Apr 21, 2022
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Ubah merah (Syzygium lineatum (DC) Merr) is one of indigenous tree type. Its population have been... more Ubah merah (Syzygium lineatum (DC) Merr) is one of indigenous tree type. Its population have been decreased with the increase of peat swamp forest degradation as the effect of land conversion and forest fire. The seed multiplication technique of S.lineatum vegetatively can be done with shoot cutting. This research was aimed to get the composition of root stimulants with suitable of growth media for growth of S.lineatum shoot cutting. The experiment of this research used split plot design with basic design of completely randomized design (CRD). The treatment as main plot was growth media cocopeat (M1) and cocopeat + husk char 2:1(M2) and as sub plot was root stimulants control (Z1) rootone-F 3.5 g (Z2) and wood vinegar 4% (Z3) with five replications in each treatments combination. The dependent variables consisted of primary root total, secondary root total, primary root length, shoot length, leaf total, and percentage of living. The results showed that the root stimulants and growth...
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Jabon consists of white Jabon Anthocephalus cadamba and Red Jabon A. macrophylla. Jabon is a tree... more Jabon consists of white Jabon Anthocephalus cadamba and Red Jabon A. macrophylla. Jabon is a tree species that have high prospects for development in industrial plantation forest development. Good quality white seedlings can be obtained through certified seedlings, intensive maintenance, and optimizing the growing media's nutrient content. One way that can be used to improve nutrients in the media is by adding organic material derived from manure and cocopeat. This study aims to obtain the right proportion of the mixture between RYP soil, cocopeat, and chicken manure to support Jabon seedlings' growth in the nursery. The method used was a completely randomized design (CRD). The treatments were consisted of 5 mixtures of FMD: cocopeat: chicken manure (v/v/v) with the proportions: (1) control (RYP), (2) 7: 1: 4, (3) 7: 2: 3, (4) 7: 3: 2, and (5) 7: 4: 1, with 5 replications. The variables observed in this study were height increase, increase in diameter, increase in the number...
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Indonesia is a country with the richest orchids spesies in the world. Forest degradation could be... more Indonesia is a country with the richest orchids spesies in the world. Forest degradation could be one of the factors that threatens the existence of orchids in the tropial forest. The purpose of this study was to search information on forest degradation impact on epiphytic orchid populations as well as the characteristics of the orchid site condition in the areal Ambawang Mountain Kubu Raya Regency. This study used survey method with stratified sampling technique on forest cover condition. Sampling area was 3 of a 40 m x 40 m, plot which divided into 4 sub plots of 20 m x 20 m. The results found 17 species of orchids with an 98 individual. There were 14 spesies orchid host trees with 130 number of trees, with three characters of bark on the host tree: rough, medium, and slightly smooth bark. Among 3 characters tree-bark type, the most orchid was found on rough-bark type. It also found differences in the number of population of orchid species at each level of canopy closure. Mute o...
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Unknown Penerbit, 2002
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The purpose of this study is to obtain data on the diversity of termite species found in peatland... more The purpose of this study is to obtain data on the diversity of termite species found in peatland at using on various water table levels. The method used in this research is survey, transect method with plot based on water level of 30, 40, 50 and 60 cm which previously been established in the field. The plots were made parallel to the ditch with a distance of ± 2 m from the transect. The size of one plot was 100 m x 2 m and made into 20 plots with the size of 5 m x 2 m so that the total of all plots is 80 plot. In each plot, the observation and searching of termites manually by digging the soil as deep as ± 20 cm. Termite criteria sampled were caste soldiers termite with red head trait and taken as much as 5-10 termites. Sampling of termites should be done for one hour per one observation plot. The termite samples obtained are then inserted into glass vials containing alcohol and further identification was done in the laboratory. The study found 3 species of termites namely Coptoter...
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Papers by Dr. Ir. Wiwik Ekyastuti, M.Si