Articles

Independent Smallholder Oil Palm Expansion and Its Impact On Deforestation: Case Study in Kampar District, Riau Province, Indonesia Erniwati, Erniwati; Zuhud, Ervizal AM.; Anas, Iswandi; Sunkar, Arzyana; Santosa, Yanto
Jurnal Manajemen Hutan Tropika Vol. 23 No. 3 (2017)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Independent smallholders who manage their own oil palm plantations without receiving technical assistance and agricultural inputs from oil palm estates or government have been  increasing rapidly in Indonesia in recent years. However the magnitude of their impacts on tropical forest deforestation remains largely unevaluated.  The objective  of this study was  to explore the history of land use, and the changes in land cover and status since the onset  of  oil palm plantation activities. The study was conducted from March to April 2016. Surveys  were carried out in 30 ha of independent smallholder oil palm in  Kampar District, Riau Province.  To identify the land status, the Agreed functional forest classification (TGHK) and Provincial land use planning (RTRWP) maps were overlaid on images of the area of independent smallholder oil palm. Landsat images three years before oil palm was established were used to assess forest cover changes.  Furthermore, oil palm smallholders and elders of the local community in the research area  were  interviewed to identify land use prior to oil palm.  Our results showed that, based on land  status, 47% of  the area of independent smallholders’ oil palm derived from logged forest; that is the land  changed in status from forest to oil palm plantation.  The other 53% of oil palm area derived from non-forested land. The land use history before the establishment of independent smallholder oil palm mostly comprised general-purpose field activities and former forest-felling (forest concessions). The land cover  before conversion into oil palm comprised rubber plantation, secondary forest, and shrub cover. From the results of our survey, we conclude that most of the oil palm plantations planted between  1990 and 2002 have their origins not in primary forest, but rather in  degraded secondary forest, former fields, and shrub-land. These results imply that conversion of forest area into oil palm plantations is not the direct cause of deforestation in the tropical forests of Kampar, Riau Province.
PENGGUNAAN MEDIA PRAKTIKUM BERBASIS VIDEO DALAM PEMBELAJARAN IPA-FISIKA UNTUK MENINGKATKAN HASIL BELAJAR SISWA PADA MATERI POKOK SUHU DAN PERUBAHANNYA Erniwati, Erniwati; Eso, Rosdiana; Rahmia, Sitti
Jurnal Sains dan Pendidikan Fisika Vol 10, No 3 (2014)
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (341.695 KB) | DOI: 10.35580/jspf.v10i3.964

Abstract

This study was an experimental study with practical application of video-based media in learning, which aims to improve student learning outcomes in the subject matter and temperature changes. Research conducted in this Kendari SMPN5 utilize VIIB class as experimental class and class VIIa as a control class. The results of this study showed that the mean scores of post-test experimental class students significantly better than the average score post-test control class indicated by the average score of students' post-test experimental class at 61.37 and scores the average post-test control class at 43.27 with thit value = 3.82> ttab = 2.01 at ? = 0.05. While the average score gain results-physics students learn science class experiment significantly better than the average score gain results Physics students learn science-control class indicated by the average score of student learning outcomes gain of 0.40 and the experimental class the average score gain control class student learning outcomes of 0.24.Penelitian ini merupakan penelitian eksperimen dengan penerapan media praktikum berbasis video dalam pembelajaran,yang bertujuan  untuk meningkatkan hasil belajar siswa pada materi pokok suhu dan perubahannya. Penelitian yang dilakukan di SMPN 5 Kendari ini memanfaatkan kelas VIIB sebagai kelas eksperimen dan kelas VIIA sebagai kelas kontrol. Hasil dari penelitian ini menunjukkan bahwa skor rata-rata post-test siswa kelas eksperimen lebih baik secara signifikan daripada skor rata-rata post-test siswa kelas kontrol yang ditunjukkan oleh skor rata-rata post-test siswa kelas eksperimen sebesar 61,37 dan skor rata-rata post-test siswa kelas kontrol sebesar 43,27 dengan nilai thit = 3,82 > ttab = 2,01 pada ? = 0,05. Sedangkan skor rata-rata gain hasil belajar IPA-Fisika siswa kelas eksperimen lebih baik secara signifikan daripada skor rata-rata gain hasil belajar IPA-Fisika siswa kelas kontrol yang ditunjukkan oleh skor rata-rata gain hasil belajar siswa kelas eksperimen sebesar 0,40 dan skor rata-rata gain hasil belajar siswa kelas kontrol sebesar 0,24.Kata Kunci:  media praktikum berbasis video, hasil belajar siswa
UJI RETENSI DAN EFEKTIVITAS TANAMAN KUMIS KUCING (Orthosiphon aristatus) TERHADAP SERANGAN RAYAP TANAH (Coptotermes sp) PADA KAYU DURIAN (Durio zibethinus) Mariana, Eka; Ariyanti, Ariyanti; Erniwati, Erniwati
Warta Rimba Vol 1, No 1 (2013)
Publisher : Warta Rimba

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Abstract

Nowadays, utilization ofnon-durable wood species in Indonesia is one alternative to meet the needs ofthe wood. Use natural preservatives such as Orthosiphon aristatus in natural wood preservation processis highly recommended as environmentally friendly.This study was aimed to determine retention and the effects of Orthosiphon aristatus leaves extracts as preservation material of Durio zibethinus wood on the Coptotermes sp. Attacks. Regency and the laboratory of Forestry Science, Tadulako University, from May to June 2013. The study was using completely randomized design with factorial pattern. The treatment of study was applying two factors. First, concentration of Orthosiphon aristatus extracts with three levels, namely; 9.09% (A1), 16,67% (A2), and 23,07% (A3). Second, Dipping time with three levels,namely: 1 day (B1), 3 days (B2), and 5 days (B3). The results showed that the highest retention value (3,538g/cm3) was achieved by the combination treatment between concentration 23,07% and dipping time 5 days (A3B3) while the lowest retention value (0,562g/cm3) was achieved by the combination treatment between concentration 9,09% and dipping time 1 day (A1B1). Hence, the lowest effectivity of preservation materials indicated by the highest weight loss,was achieved by A1B1 combination treatment (3,37%) while the lowest (highest effectivity) was achieved by (A3B3) combination treatment (1,88%). Keywords: Concentration, Dipping time, Orthosiphon aristatus, Durio zibethinus, Coptotermes sp.
Analisis Variasi Temperatur Aktivasi Terhadap Daya Serap Arang Aktif Tandan Aren (Arenga Pinnata Merr) Dengan Agen Aktivasi Potassium Silicate(K2SiO3) Azam, Muhammad; Anas, Muhammad; Erniwati, Erniwati
Jurnal Penelitian Pendidikan Fisika Vol 5, No 3 (2020): Jurnal Penelitian Pendidikan Fisika
Publisher : Jurusan Pendidikan Fisika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36709/jipfi.v5i3.13803

Abstract

This study aims to determine the effect of variation of activation temperature of activated carbon from sugar palm bunches of chemically activatied with the activation agent of potassium silicate (K2SiO3) on the adsorption capacity of iodine and methylene blue. Activated carbon from bunches of sugar palmacquired in four steps: preparationsteps, carbonizationstepsusing the pyrolysis reactor with temperature of 300 oC - 400 oC for 8 hours and chemical activation using of potassium silicate (K2SiO3) activator in weight ratio of 2: 1 and physical activation using the electric furnace for 30 minutes with temperature variation of600 oC, 650 oC, 700 oC, 750 oC and 800 oC. The iodine and methyleneblue adsorption testedby Titrimetric method and Spectrophotometry methodrespectively. The results of the adsorption of iodine and methylene blue activated carbon from sugar palm bunches increased from 240.55 mg/g and 63.14 mg/g at a temperature of 600 oC to achieve the highest adsorption capacity of 325.80 mg/g and 73.59 mg/g at temperature of 700 oC and decreased by 257.54 mg/g and 52.03 mg/g at a temperature of 800 oCrespectively.However, it does not meet to Indonesia standard (Standard Nasional Indonesia/SNI), which is 750 mg/g and 120 mg/g respectively.
Analisis Nilai Kapasitansi Komposit Lithium Besi Oksida (Li5FeO4) dan Karbon Aktif Kulit Biji Mete sebagai Bahan Dasar Elektroda Baterai Lithium: Efek Variasi Massa Ahmad, Ahmad; Erniwati, Erniwati; RM, Vivi Hastuti
Jurnal Penelitian Pendidikan Fisika Vol 5, No 3 (2020): Jurnal Penelitian Pendidikan Fisika
Publisher : Jurusan Pendidikan Fisika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36709/jipfi.v5i3.13932

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Previous researchers have investigated the manufacture of lithium battery electrode materials from Li5FeO4 composites with activated carbon of cashew nutshells. However, the effect of combining activated carbon to the lithium battery electrode material was not reviewed. The purpose of this study was to determine the effect of the comparison of the mass composition of Li5FeO4 and cashew nut shell active carbon on the capacitance value of the lithium battery electrode. These electrodes generated using the high-temperature solid-state method. The material used is iron oxide Fe2O3 from iron sand and LiOH.H2O, which homogenized with a sintering temperature of 850ÌŠC for 15 hours with a ratio of 6/1 to produce Li5FeO4. Then Li5FeO4 was compiled with activated carbon of cashew nut shells with a mass fraction of activated carbon 60%, 50%, 40%, and 20%. Furthermore, it characterized using cyclic voltammetry. The results of cyclic voltammetry characterization for a mass fraction of 60% produce a capacitance of 4.7 F / g, a mass fraction of 50% produces a capacitance of 59.1 F / g, a mass fraction of 40% produces a capacitance of 87, 3 F / g, and a mass fraction of 20% produces capacitance of 243 F / g. From the four variations of mass fraction, the capacitance that meets the lithium battery electrode capacitance on the market is the mass fraction of 20%.
KERAGAMAN DAN KELIMPAHAN LEBAH SOSIAL (APIDAE) PADA BUNGA TANAMAN PERTANIAN MUSIMAN YANG DIAPLIKASI PESTISIDA DI JAWA BARAT Kahono, Sih; Erniwati, Erniwati
BERITA BIOLOGI Vol 13, No 3 (2014)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v13i3.660

Abstract

Study of diversity and abundance of social bees (Apidae) in the pesticide-applied seasonal crops were carried out for nine species of crops in a lowland area, Dramaga, Bogor and on 17 species of crops ina highland area, Lembang, Bandung, both in the province of West Java. Two species of honey bees (Apis cerana and A. dorsata) and one species of stingless bee (Trigonalaeviceps) were recorded from the lowland crops,while only A. cerana was found in the highland crops. The most abundant bee species on both low and highland was the honey bee A. cerana. The number of A. cerananests and T. laevicepsnests in the surroundings of the study sites were relatively high. Colony members of both bee species were very active to collect nectar and pollen from flowers in non-pesticide-applied sites; however, the density of bees visiting flowers in pesticide-applied seasonal crops in both lowland and highland were relatively low.
RETENSI DAN EFEKTIVITAS BAHAN PENGAWET EKSTRAK DAUN CENGKEH (Syzygium aromaticum) PADA KAYU DURIAN (Durio zibethinus) TERHADAP SERANGAN RAYAP TANAH (Coptotermes sp.) Toleng, Fitriyani N.; Erniwati, Erniwati; Ariyanti, Ariyanti
Warta Rimba Vol 2, No 2 (2014)
Publisher : Warta Rimba

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Abstract

Effectiveness of natural substance as preservative agent is needed to be further observed. One of the substances is extract of Glove (Syzygium aromaticum) leaf. This extract was considered to be effective material on Durian (Durio zibethinus) wood preservative against Subterranean termite (Coptotermes sp). The aims of this study were compare the retention and the affectiveness of preservative materials which  extracted from Glove leaf by using different method of extraction. This studi was done at Agro-technology Laboratory of Agricultural Faculty, Tadulako University, over the period of March and June 2014. Bioassay on Termite destruction was done at Maku Village, Dolo of Sigi Regency. The experiment was arranged based on Completely Randomized Design (CRD) in two different factorial patterns. The first factor was different method on leaf extraction (A) i.e. by using ethanol (A1), and by using distillated water (A2). While the second factor (B) was different time on soaking material, i.e. 1 day soaking time (B1), and 3 days were soaking time (B2). All units was performed as negative control. One percent of preservative extract was applied on each experimental unit. The outcome of this study showed that water content of axtract was 14,726% and the density was 0,463 g/cm3. The highest retention value 0,1244 g/cm3 was recorded on the treatment of 3 days ethanol extraction (A1B2), while the lowest value 0,0868 g/cm3 was detected on the treatment of 1 day water extraction. The highest value on effectiveness (or lowest rate on loss weight) 2,4075% was detected after the treatment by using 3 days ethanol extraction substance, while the lowest value 4,6818% was  measured on control unit. Key words: Syzygium aromaticum, Durio zibethinus, Retention, Effectiveness.  
RETENSI BAHAN PENGAWET EKSTRAK DAUN TEMBELEKAN (Lantana camara L) PADA BEBERAPA JENIS KAYU DAN EFEKTIFITASNYA TERHADAP SERANGAN RAYAP TANAH (Coptotermes sp.) Riska, Riska; Erniwati, Erniwati; Hapid, Abdul
Warta Rimba Vol 2, No 2 (2014)
Publisher : Warta Rimba

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Abstract

High-grade durable wood could not be longer to meet the various needs, this caused by limited and the more expensive price, so it must use low grade durable wood. The use of low grade durable wood should be followed by the wood preservation process. This study aims to determine the preservative retention of leaves tembelekan (Lantana camara L) on bayur (Pterospermum sp), benuang (Octomeles sumatrana Miq) and durian (Durio zibethinzs) and its effectiveness against subterranean termites (Coptotermes sp), attack. It was conducted at the Laboratory of Agrotechnology, Faculty of Agriculture, University Tadulako in March to june 2014. Testing Subterranean termites (Coptotermes sp) test was carried out at the Maku Village, District of Dolo, Sigi Regency, Central Sulawesi, using a completely randomized design (CRD), with treatment of different wood species and 3 days soaking duration at a concentration of 1% preservative with 6 replications. The results show the moisture content of bayur, benuang and durian woods are 13,10%, 10,81% and 11,35% respectively. The wood densiy of bayur 0,480g/cm3, benuang 0,277 g/cm3 and durian 0,402g/cm3 and the highest retention values is found at wood of durian 59,09 g/cm3 and the highest retention values is at bayur 41,67 g/cm3. In addition, the highest weeight loss (leas effectiveness) of 15,02% on the wood of bayur (control) and the lowest (highest Effectiveness) on wood of benuang 0,72%. Key words: Leaf extract of tembelekan, Lantana camara L, Octomeles sumatrana Miq, Pterospermum sp, durio sibethinzs
EFEKTIVITAS BAHAN PENGAWET ALAMI DARI TANAMAN TEMBELEKAN (Lantana camara L) PADA BEBERAPA JENIS KAYU TERHADAP SERANGAN RAYAP TANAH (Coptotermes sp.) Safitri, Risky; Erniwati, Erniwati; Hapid, Abdul
Warta Rimba Vol 2, No 2 (2014)
Publisher : Warta Rimba

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Abstract

Many favorable properties of wood are available in almost all parts of the world, easily obtained in different shapes and sizes, relatively easy to process, as well as very decorative appearance. However, wood also has a weakness that could be damaged by a variety of factors either biological, physical, mechanical or chemical. In reality, the main factors causing damage to the wood are fungi, bacteria, insects and marine animals (marine borer). The organisms might damage the wood because they make as a shelter or as feed. Therefore, there should be conducted wood preservation to overcome the unfavorable properties of the woods. Wood preservation aims to extend the use of low-class durability of timber species such as Bayur (Pterospermum sp), Durian (Durio zibethinus) and Benuang (Octomeles sumatrana Miq). This study aimed at determining the effectiveness of a natural preservative tembelekan (Lantana camara L). The research was conducted at the Forestry Sciences Laboratory, Department of Forestry, Forestry Faculty, Tadulako University and Talise Mantikulore Sub-district, started from May to July 2013. The study was designed with the method of completely randomized design (CRD) with three wood species treatment, namely bayur, durian and benuang. Each was preserved with a natural preservatives of tembelekan extract with a concentraation of 13,04%. There were 10 samples of each type of wood, consisting of 5 test samples preserved and 5 controls (without preserrvatives). There were 30 test samples. The parameters observed were preservative effectiveness of the sample weight after feeding on soil termites. The study shows that highest natural preservative effectiveness on benuang wood was preserved with the sample weight loss of 2,25% and the lowest on bayur wood was preserved with the sample weight loss of 3,47% when they were compared with the control sample (without preservative). Using tembelekan extract might increase wood resistance to soil termite attacks. Keywords: Captotermes sp, Durio zibethinus, Lantana camara L, Octomeles sumatrana Miq, tembelekan.
Aplikasi Lesson Study dalam Upaya Peningkatan Kualitas Pembelajaran Fisika Matematika Erniwati, Erniwati; Busnawir, Busnawir
Jurnal Matematika, Statistika dan Komputasi Vol 11, No 1: July 2014
Publisher : Department of Mathematics, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (230.433 KB) | DOI: 10.20956/jmsk.v11i1.3423

Abstract

Penelitian ini bertujuan untuk meningkatkan kualitas pembelajaran fisika matematika dengan mengaplikasikan lesson study pada  mahasiswa. Pada penelitian ini, ada 2 faktor yang diselidiki, yaitu 1. faktor mahasiswa untuk melihat aktivitas mahasiswa selama  proses pembelajaran yang meliputi diskusi kelompok, kerja sama dalam kelompok dan kemampuan menyelesaikan LKM, 2. faktor dosen untuk melihat kesesuaian antara langkah-langkah proses pembelajaran dengan  rencana pembelajaran yang dilakukan pada saat plan. Pelaksanaannya  terdiri atas 4 tahap, dan masing-masing tahap memuat 3 kegiatan yakni: Plan, do, dan see . Hasil penelitian menunjukkan bahwa adanya kecenderungan peningkatan kualitas pembelajaran melalui peningkatan prosentase aktivitas dosen yang berdampak pula pada peningkatan aktivitas mahasiswa.Berdasarkan hasil temuan di atas dapat disimpulkan bahwa aplikasi Lesson Study pada pembelajaran Fisika Matematika dapat meningkatkan kualitas pembelajaran dengan meningkatnya aktivitas mahasiswa dan keterlasanaan proses pembelajaran  oleh dosen model.