Tropical Wetland Journal (TWJ)
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125 research outputs found
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Study on Oil Production from Black Soldier Fly (Hermetia illucens) Maggots as a Feed Additive for Broiler
No full textThe broiler chicken farming industry in Indonesia continues to experience rapid growth in line with the increasing demand for chicken meat. To support the development of this industry, one of the main challenges that must be addressed is the availability, efficiency, and quality of feed. The aim of this study was to determine the effect of Black Soldier Fly (Hermetia illucens) maggot oil as a feed additive on the performance, abdominal fat, and intestinal E. coli of broiler chickens. This research was conducted experimentally using a completely randomized design (CRD) with 5 treatments and 4 replications. Each experimental unit consisted of 5 MB-212 P broiler chickens from PT. Japfa, with the following treatment details: R0 – 0% maggot oil in the feed; R1 – 0.5% maggot oil (14-day-old) in the feed; R2 – 1% maggot oil (14-day-old) in the feed; R3 – 0.5% maggot oil (28-day-old) in the feed; and R4 – 1% maggot oil (28-day-old) in the feed. Results of the Duncan’s Multiple Range Test showed that all measured parameters, except for abdominal fat, were significantly affected (P<0.05) by the supplementation of maggot oil in the feed. The addition of 1% maggot oil from 14-day-old larvae as a feed additive significantly improved broiler performance, as indicated by the highest feed intake of 352.28 g/bird, live weight of 1,058.5 g, carcass percentage of 83.44%, abdominal fat of 1.47%, and intestinal E. coli count of 4.00 × 10⁵ CFU/g.However, the supplementation of 1% maggot oil from 28-day-old larvae resulted in poorer broiler performance, as indicated by lower feed intake (286.90 g/bird) and a relatively high feed conversion ratio (FCR) of 2.03
Environmental Influence on the Use of Abusive Language and Solutions through the NABA Program at SDN-SN Kuripan 2
No full textThe surrounding environment is one of the primary factors influencing children\u27s behavior. The environment has the potential to exert both positive and negative influences. This study aims to explore the impact of the surrounding environment on the behavior of elementary school students. The research employs a qualitative descriptive approach, with data collected through observation and interviews. Field findings indicate that negative environmental influences can lead to undesirable behaviors among students, such as the tendency to use inappropriate language in communication. This study is expected to be followed up with the implementation of the "Goodness Advice Program" (NABA), which focuses on habituating students to consistently exhibit positive behavior. For more severe issues, schools are encouraged to collaborate with parents and the community to provide appropriate parenting support
The Periodic Carbon Stock Calculation and Monitoring of Flora and Fauna of the Watershed Rehabilitation Area of PT Asmin Bara Bronang: The Periodic Carbon Stock Calculation and Monitoring of Flora and Fauna of the Watershed Rehabilitation Area of PT Asmin Bara Bronang
No full textWatershed rehabilitation is an important effort in restoring natural conditions, especially along river flows for conservation efforts. Observations are still being made on permanent plots observed from 2020 for 250ha with 51 permanent plots were made spread evenly with a plot size of 20x20meters. The sampling intensity taken for this periodic observation was 0.816% using a carbon and biodiversity calculator from Michigan State University 2018.
The results of the 2024 monitoring show that there is an increase in the amount of carbon by 21,069tons of carbon in all permanent plots in the area and an increase in the total carbon dioxide equivalent in the area of 77.26tons of carbon increased from 2020 and on each hectare of the area there is an increase in the amount of carbon over a period of one year. The increase trees species in the area is known to have 15 species, with the Menhinnick index 0.5; Margalef\u27s index 2.; Shannon diversity indices 1.48; Simpson diversity indices 0.71; The frequency appears of species 0.55. The types of wildlife found of direct encounters, nests, footprints, feces, voices and feathers, were directly found orangutan, deers, birds, bears, and wildboars
Characteristics and Invitro Digestibility of Kalimantan Swamp Forage as Animal Feed
Full text linkThis study aims to evaluate swamp forage, for possible application as an animal feed in South Kalimantan Indonesia. The samples were obtained from the swamp areas through a survey method, by collecting sampling the grass from 2 selected regions (North Hulu Sungai and South Hulu Sungai). The observed parameters are 1). Identify the characteristics of the growth of swamp grass by the shape of leaves, roots and flowers. 2). Measurement of Nutrient Content, NDF and ADF, nutrient content of swamp forage.. The results showed that the characteristics of the South Kalimantan swamp grass had stolon and fiber roots, the leaves were mostly ribbon-shaped and compound flowers, and the highest lignin content was in Ischaemum polystachyum grass. J. Presl of 11.45%, total phenol 9.23, tannins of 3.74 and condensed tannins of 1.43. while for the highest digestibility of Hymenachne amplexicaulis (Rudges) Ness grass, namely dry matter digestibility of 31.25%, organic matter 27.42%, VFA 124.22 mM and NH3 of 3.65.mM.. The findings in this study will provide important information about forage fodder that grows in swampland in Kalimantan. It was concluded that swamp grass has a comparative advantage compared to other grasses
Death Voyage Tradition: Spiritual and Social Values in the Sasak Community\u27s Practices in Sintung Village, Central Lombok, West Nusa Tenggara: Spiritual and Social Values in the Sasak Community\u27s Practices in Sintung Village, Central Lombok, West Nusa Tenggara
No full textThis study examines the spiritual values embedded in the death voyage rituals practiced by the Sasak community in Desa Sintung, Pringgarata Sub-district, Central Lombok. Rooted deeply in Sasak traditions, these rituals are seen as a means to pray for the deceased\u27s peaceful journey to the afterlife and as social gatherings that strengthen communal bonds within the community. Using a qualitative research method with a descriptive approach, data were collected through in-depth interviews, observations, and documentation. The collected data were analyzed using the data analysis techniques of Miles and Huberman. The findings reveal that the death voyage rituals are conducted on the eighth day after death and continue weekly on the same day until the fortieth day. The rituals encompass various spiritual values, including religious, moral, empirical, and aesthetic elements. These practices remain ongoing and are viewed positively by the community. This study highlights the continuity of these rituals, reflecting the Sasak community\u27s dedication to preserving and practicing their unique cultural identity
Mapping of Density and Differentiation of Mangrove Species in the Tanjung Pemancingan Area, Kotabaru
No full textThis study aims to identify mangrove species and map the density of mangrove vegetation in the Tanjung Pemancingan area, Kotabaru, using an object-based classification method (OBIA) applied to Sentinel‑2 imagery and Unmanned Aerial Vehicle (UAV) data. Mangroves play a crucial role in protecting coastlines from erosion and serving as habitats for various species, making an in‑depth understanding of mangrove distribution and types essential for coastal conservation and environmental management. The OBIA method allows for more accurate mapping by considering texture, shape, and more complex spatial patterns compared to traditional pixel‑based methods. In this study, OBIA is combined with the Support Vector Machine (SVM) algorithm and an optimized multiscale segmentation scheme to improve mangrove species discrimination, and the resulting products are linked with NDVI‑based canopy density classes for management‑oriented analysis. The analysis utilizes Sentinel‑2 Level‑2A satellite imagery with a spatial resolution of 10 × 10 meters (bands 8, 4, 3, and 2) and very high‑resolution UAV data (≈ 4.0 cm/pixel) generated from flights at 150 m altitude. The NDVI values for mangroves in the study area range from −0.30 to 0.686 and are classified into three canopy density classes using the equal interval method: sparse (−0.30 to 0.026), moderate (0.027 to 0.356), and dense (0.357 to 0.686). The OBIA method combined with the SVM algorithm successfully discriminates seven mangrove species with an overall accuracy (OA) of 72.46%, which exceeds the minimum 70% accuracy standard for mangrove land cover and canopy density interpretation set by the Geospatial Information Agency (BIG). The identified mangrove species include Avicennia alba, Avicennia marina, Avicennia officinalis, Avicennia rumphiana, Bruguiera gymnorhiza, Rhizophora apiculata, and Sonneratia alba, with A. rumphiana being the most dominant species, covering an area of 13.87 hectares, while A. officinalis occupies only 0.6 hectares. The mangrove vegetation density and species composition are successfully mapped and integrated, providing valuable information that can be used in conservation planning, coastal resource management, disaster mitigation, and ecotourism development in the area. Furthermore, these results highlight the potential of combining Sentinel‑2, UAV, OBIA, and SVM as an operational framework for mangrove ecosystem monitoring in coastal industrial setting
Effectiveness of Chicken Manure and Tofu Waste Liquid Organic Fertilizer on The Growth and Yield of Mustard Plants
No full textThis research aimed to evaluate the interaction between chicken manure and tofu liquid waste-based liquid organic fertilizer (POC) on the growth and yield of pak choy, as well as to determine the individual and combined effects of chicken manure and tofu liquid waste POC on pak choy performance. The study employed a completely randomized design (CRD) with two factors. The first factor was chicken manure application: A0 (control), A1 (25 t ha⁻¹), and A2 (35 t ha⁻¹). The second factor was the concentration of tofu liquid waste POC: L0 (control), L1 (10%), L2 (15%), and L3 (20%). The experiment was conducted over three months, from February to May 2024, at the Sustainable Food Yard Demonstration Plot managed by the Palem Asri Komet Women Farmers Group. The results indicated a significant interaction between chicken manure and tofu liquid waste POC on plant height during the first and second weeks of growth. The combination of A1 (25 t ha⁻¹ chicken manure) and L1 (10% POC concentration) yielded the best results. Additionally, chicken manure alone significantly affected the number of pak choy leaves across all four weeks, with A1 again being the most effective treatment. In contrast, tofu liquid waste POC applied as a single factor did not significantly influence plant growth or yield
The Influence of The Role of Teachers In Preventing and Handling Bullying Cases In Elementary Schools
No full textThis research aims to examine how teachers can influence the prevention and handling bullying cases at SDN SN Surgi Mufti 1, using various approaches, both product-based and non-product-based, as initial strategies to educate students about how negative impact of bullying. Bullying is defined as aggressive behaviour that is repeatedly carried out by an individual or a group towards another individual perceived as weaker, either physically or psychologically. This study employs a descriptive qualitative approach with a case study method conducted in a school located in a residential area, often attended by students from diverse backgrounds. Data were collected through observations and interviews with the school principal and teachers. The findings indicate that bullying, both physical and verbal, still frequently occurs in this school. Therefore, the schools has made various efforts to prevent bullying. These efforts include not only the use of product-based approaches but also non-product-based strategies to reduce bullying cases in the school
The Effect of Giving NPK and Biochar from Palm Oil Fronds on Palm Oil Main Nursery Seedlings: NPK and Biochar from Palm Oil Fronds on Palm Oil Main Nursery Seedlings
Full text linkThis study aims to determine the effect of NPK and biochar made from oil palm fronds on the growth of palm oil seedlings at the main nursery stage using 4-month-old palm oil seedling samples. The experimental design used was a Randomized Block Design with two treatment factors with three replications. The first treatment factor was the administration of NPK 15-15-6-4 with a dose of 0.1 grams, 2 grams/polybag and the second factor was the administration of oil palm frond biochar with a dose of 0, 2.5 grams, and 5 grams. The results of research to observe the height parameters of palm oil seedlings in the main nursery, the best plant height was shown in B1N2 seedlings with a total height of 33.2 cm in the 7th week with a dose of 2.5 grams of B1N2 palm oil frond biochar and 2 grams of NPK. The highest number of fronds was found in B2N2 main nursery palm oil seeds with a total of 6 fronds, namely at a dose of 5 grams of biochar and 2 grams of NPK. The best enlargement of palm oil stump diameter was found in main nursery B0N2 palm oil seeds with an average stump diameter of 120.9 mm. The administration of NPK and biochar from palm oil fronds had a good effect on the height of palm oil seedlings, the number of palm oil fronds and good tuber enlargement
The Effect of Shade and Organic Fertilizer on Neptunia oleracea Growth and Yield Production
No full textThis study aimed to find out the effect of shade and manure doses on the growth and production of Neptunia oleracea. The research was designed using factorial completely randomized design (2x3). There were two factors, the first factor was shade, namely without shade and 75%-net shade, while the second factor was the dose of manure, namely 0, 10, and 20 grams/polybag, respectively. Each treatment had five replications. The result showed that shade significantly (P<0,01) inhibits the number of petioles, number of root nodules, and yield production of Neptunia oleracea but does not affect plant height and the number of branches. Manure dosage had not significantly affected productivity of N. oleracea. There was no interaction between shade treatment and manure dosage. It concluded that Neptunia oleracea as a forage is more productive when grown up without shade