Biotropic : The Journal of Tropical Biology
Not a member yet
94 research outputs found
Sort by
Inventarisasi Tumbuhan Obat Yang Dimanfaatkan Oleh Masyarakat Desa Durian Pandaan Kabupaten Pesisir Selatan
Full text linkUtilization of natural plants as medicine is one of the skills that has been scarce found even some places only become a wisdom by the local community. The use of natural plants as traditional medicine by the Durian Pandaan villagers is still widely used for traditional medicine. Among the medicinal plants used, the scientific name of the plant is still unknown. The purpose of this study was to determine the types of medicinal plants used by the Durian village community. This study used a descriptive survey method with direct observation and field interviews with 3 herbalists. Samples that have been fielded can be directly photographed intact and identified. The results of research conducted in the village of Durian Pandaan obtained 77 species from 44 families. With the highest use value is Curcuma domesti
Identification of Potential Medicinal Plants in Tawang Selubang Forest in Kelam Permai Subdistrict, Sintang Regency, West Kalimantan
No full textThe Tawang Selubang Forest, located in the Other Use Area (APL) is determined by the regional government of Sintang Regency, West Kalimantan as the Hutan Tutupan (forest cover). This forest has great benefits for the community, one of which is as a source of medicinal plants. This research aims to identify the potential species of medicinal plants in the Tawang Selubang Forest Cover. Inventory of potential medicinal plants is done by making a square (0.5 Ha) cluster design (100 mx 100 m) in which there are 5 circular plots. Each plot contained several circular subplots that functioned for observation of seedling level (r= 1 m), stake (r= 2 m), pole (r= 5 m) and tree (r= 17.8 m). The number of plant species found in the Tawang Selawang Forest Cover were 47 species and 27 species were medicinal plants. Some species of medicinal plants that have a high density and important value index are Xanthophyllum amoenum Chadat, Antidesma montanum Blume, Nephelium maingayi Hiern, Palaquium gutta (Hook.) Baill and Syzygium lineatum (DC.) Merr. & J.Parn
Potensi Ekstrak Lengkuas (Alpinia Purpurata K. Schum) Sebagai Fungisida Terhadap Jamur Alternaria Sp. Pada Tanaman Jeruk
Full text linkAlternaria sp. is one the causess of diseases that attack citrus crops. Pest and diseases control efforts by farmers more often use pesticide synthesis. This study aims to determine the inhibition of mushroom growth and other benefits of galangal extract as a natural fungicide and determine the optimum concentration of galangan extract inhibiting the growth mushroom of Alternaria sp.. The method used was experimental, testing conducted by growing mycelium mushroom Alternaria sp. on a PDA that has been mixed with extract of galangal in according to the respective concentrations and analyze growth response by measuring the diameter. The best results indicated by the treatments 60% that control the growth of mushrooms with deaths amounted to 79%. This shown that galangal extract is able to control the growth of Alternaria sp. at concentrations 60% compared to a concentration of 20%, 30%, 40% and 50% because the active compounds at concentrations that are 60% higher, so galangal extract diffuse into the cell the growing of mushrooms and may cause disruption the growth mushrooms Alternaria sp.. The higher concentration of extract given, the ability to controlling the growth mushroom of Alternaria sp. the better. The utilization of galangal material is done as an alternative fungicide in the control of plant diseases that are eco friendly
Kontaminasi Residu Pestisida Organofosfat di Dalam Tanaman Holtikultura
Full text linkExcessive use of organophosphate pesticides is becoming more common these days. This can affect the level of pesticide residues in farmers' crops. Excessive spraying of pesticides can result in environmental pollution both small and large scale. If excessive exposure to these pesticides can cause damage to the ecosystem. The purpose of this study was to determine the level of organophosphate pesticide residues found in horticulture plants. This research method is a systematic review, by analyzing various studies regarding the contamination of organophosphate pesticide residues in horticultural crops. There are 20 studies from within the country. The results obtained in the form of levels of pesticide residues that are still below the threshold of the BMR (Maximum Residue Limit) of pesticides determined by SNI. Two other studies show that no pesticide residue content was detected. Conclusion: This shows that the sample tested is still safe for consumption. Socialization and education about the doses of pesticide use and how to reduce levels of pesticides in horticultural crops are needed to reduce the risk of exposure to pesticide
Kepadatan Populasi Ulat Penggerek Polong (Maruca testulalis) pada Tanaman Kacang Panjang (Vigna sinensis) di Kelurahan Gunung Sarik Kecamatan Kuranji Kota Padang
Full text linkThe population of Maruca testulalis in the long bean (Vigna sinensis) can lower the yield productions. Maruca testulalis attack the part of the pods long bean that left little holes in the pod. In that regard, so the research has been done about population density Maruca testulalis on the long bean plant (Vigna sinensis) in Celebacy Gunung Sarik Seedlings Kuranji Padang City. This research has been done, in January-February 2019 by using Survey Descriptive method which is a direct collector of pods long beans. Purposive Random Sampling technique sample. Sample were taken at 60 days and 70 days. Measured environmental conditions thats temperature, humidity, precipitation, wind speed, and pH. Based on the research being done, population density Maruca testulalis on the long bean plant (Vigna sinensis) in Celebacy Gunung Sarik Seedlings Kuranji Padang City 1,3 individual/plant (age 60 days) and 0,95 individual/plant (age 70 days). Population density Maruca testulalis 1,12 individuals/plants and fall in the category of light attack
Identifikasi Serangga Hama Selada Hidroponik sebagai Langkah Awal Penyediaan Sayur Sehat
No full textHydroponic agriculture in urban areas is one of urban farming, an agricultural system without using soil media that uses narrow land in urban areas and is free from the use of synthetic pesticides. This purposes of this study were to identify the species, analyze the diversity, and abundance of insects that attack lettuce on hydroponic land. The samples were collected by using the yellow pan trap, netting, and hand picking methods. Identification of insects based on morphological characteristics. Data were analyzed by the Shannon-Wiener diversity index (H) and abundance index (Di). The results showed that there were 18 species of insects belongs to 13 families that attacked hydroponic lettuce, namely the family Acrididae, Agromyzidae, Aleyrodidae, Calliphoridae, Coccinellidae, Crambidae, Dolichopodidae, Hesperiidae, Noctuidae, Pieridae, Psilidae, Stratiomyidae, and Syrphidae. The diversity of the insects was in the category medium with a diversity index value of 2,707 and the most abundant species found was Chrysodeixis chalcites 11,70%, Spodoptera litura 10,64%, and Pieris rapae 9,57%
Efektivitas Bokashi Daun Kelapa Sawit (Elaeis guineensis Jacq) Terhadap Produksi Kacang Kedelai (Glycine max (L.) Merr.) di Pasaman Barat
Full text linkThe low production of soybeans in the West Pasaman district is due to severeal factors, including the lack of community knowledge in soybean farming which results in less productive yields obtained by farmer and the high use of inorganic fertilizers continuously resulting in less productive soil. This study was experimental research using a completely randomized design (CRD). The treatments given were 6 treatments and 5 replications, the treatments used were 15 gram TSP (A treatment) as control treatments, 300 gram bokashi (B treatment), 400 gram bokashi (C treatment), 500 gram bokashi (D treatment), 600 gram bokashi (E treatment), 700 gram bokashi (F treatment). The data obtained were analyzed by analysis of variance and then continued by LSD test at α level of 5%. Observed parameters were the number of planting seeds and weight of 50 seeds per plant. The results of this study indicated that bokashi fertilizer had no significant effect on the number of seeds but it had significant effect on the weight of 50 seeds and the best result was found in B treatment (300 gram bokashi/polybag). This research had environmental conditions with temperatures of 30 – 340 C, environmental humidity of 63 – 80%, wind speeds of 0,2 to 2,8 m/s, and soil pH of 5,4 to 7,0
Studi Populasi Ikan Beloso (Oxyurichthys microlepis) Di Perairan Morosari Kec. Sayung, Demak
Full text linkThis study aims to study population of beloso fish. The research was conducted between May-June 2010 at Morosari Waters Area, District SayungDemak. Beloso fish catches are measured standard length, total length and weight. The data analysis suchgrowth was using Von Bertalanffy, length - weight relationship, conditional factor and, food and feeding habits.Growthof beloso fish(O. microlepis) in Morosari waters area has a value of L ∞ of 13,49cm by the equation L(t) = 13,49 ( 1 - exp 0,0175 (t-1,9053)) for length,while based on the weight obtained for W ∞ 128,33 grams with the equation W(t) = 128,33 ( 1 - exp -0,003 (t-2,4312))3. Length-weight relationship beloso fish have value of b1,451 in the Morosari waters area. This value indicates that the growth of beloso fish is negative allometric, which the addition of lengthis faster than its weight. Based on data calculations of beloso fish condition factor in the Morosari waters shows the range of condition factors from 0,0965 to 0,3661, which are preferred food energy accretion term. Beloso fish areomnivorous fish that consume phytoplankton, zooplankton, and detritus as food found in the Morosari estuary
Isolasi Dan Karakterisasi Bakteri Selulolitik Biopori Sebagai Upaya Awal Percepatan Proses Pengomposan
No full textThe purpose of this study was to obtain cellulolytic bacterial isolates isolated from leaf litter in absorption holes biopori FMIPA Unesa and obtain the most optimal cellulolytic bacterial isolates in cellulose degradation. This research was an observational study and the data were analyzed descriptively. Stages of the study began with bacterial isolation, cellulolytic ability testing, and characterization of cellulolytic bacterial isolates. Bacterial isolation was carried out by the pour plate method, isolation was carried out by the streak plate method, cellulolytic testing was carried out using Carboxy Methyl Cellulose media which was given Congo red 1%. While the isolation characterization was done morphologically, physiologically, and biochemically. The results obtained 15 isolates of cellulolytic bacteria that were tested for their ability to degrade cellulose. Cellulolytic test results showed that 6 isolates, namely BS1, BS7, BS10, BS11, BS14, and BS15 had a cellulolytic index of 0.8, 0.8, 0.8, 0.8, 0.8, 0.8. and 1. Isolates BS15 is the most optimal isolate in cellulose degradation with characteristics of the punctiform colony, yellow pigmentation, entire edge, convex elevation, optical opaque and smooth surface, produces catalase enzymes, is non-motile and can ferment in glucose and starch but cannot ferment lactose and also a Gram-negativ
Analisis Vegetasi di Kawasan Petilasan Mbah Maridjan Taman Nasonal Gunung Merapi
Full text linkThis research aims to determine the diversity of habitus and species that dominate in the region of Kinahrejo, Umbulharjo, Cangkringan, Sleman. The method used is square sampling by making a 7x7 meters square plot of 2 plots so that an area of 98 m2 is obtained. Vegetation analysis using the method of observation, and monitoring (field observation) directly with random sampling and using the principle of representative. Analysis the level of habitat diversity using the Shannon-wienner Index and determination of species that dominate using the calculation of the Important Value Index (INP). A total of 34 species consisting of mosses, shrubs, herbs, and stand-structure are occupy the observation area. The results of the research and analysis showed that Tamarindus indica, which included stand-structure habitus had the highest INP of 139.54% and the lowest INP was found in shrubs habitus. The highest Shannon-wienner index in shrubs habitus is 1.220928 and the lowest is in stand-structure habitus. It can be concluded, stand-structure habitus dominates the area while, the highest diversity is found in shurbs habitus. The eruption in 2010 caused damage to ecosystems and invasive plants to become dominant such as Acacia decurrens and shrubs