Jurnal Sains Teknologi dan Lingkungan (JSTL)
Not a member yet
335 research outputs found
Sort by
Seed Bank Gulma Pada Beberapa Kedalaman Tanah Tegakan Jambu Mete di Lahan Kering
Full text linkThe dynamics of weed invasion in cashew guava is influenced by the potential of the standing soil as a weed seed bank. Therefore, research was carried out which aimed to examine weed species that had not yet grown because environmental factors were not yet supportive. The first research used a descriptive method and collected data in the field using an exploratory survey method. The second research used an experimental method, by observing the potential of various soil depths of cashew stands as a weed seed bank. The research results showed that 17 weed families were found in cashew plantations, consisting of 2 Ciperaceae species, 9 Poaceae species and 21 broadleaf species. The highest diversity, population and ability to grow simultaneously Weed bank seed occurs at a soil depth of 0 ± 30 cm, then decreases at a soil depth of > 30 ± 40 cm and is very low at a soil depth of > 40 ± 50 cm. Seed bank weed species which are always dominant at various soil depths are dominated by poaceae and broad-leaf weeds so that the number of species, the percentage that grows and the dry biomass weight is significantly higher than that of sedge weeds. The size of the seed bank is determined by the combination of seeds produced by previously growing weeds. So weed seeds will remain a problem as long as there is a supplier for these seeds
Kajian Kelayakan Usahatani Jamur Tiram Putih (Pleurotus ostreatus) (Studi Kasus Pada UMKM Agro Jamur Lombok Kecamatan Gunungsari Kecamatan Lombok Barat)
Full text linkWhite oyster mushrooms are one of the alternative foods that can be produced by farmers to meet the food needs of the community. The purpose of this study was (a) to determine the costs incurred by farmers in white oyster mushroom farming activities, and (b) to determine the feasibility of white oyster mushroom farming in Lombok Agro Mushroom UMKM. This study uses a descriptive method, where data sources include primary data and secondary data. The number of respondents in this study was 3 people consisting of business owners and employees. The analysis tools in this study used the R / C Ratio and B / C Ratio. The results showed that the total cost incurred in this farming business was IDR 2,633,763, while the income obtained was IDR 6,000,000 and income was IDR 3,366,237. This white oyster mushroom farming business is feasible to run because the R / C Ratio value> 1 and the B / C Ratio value> 0 were obtained. The R / C Ratio value obtained in this white oyster mushroom farming business was 2.28 and the B / C Ratio value was 1.28
Perkembangan Pakan Lobster Berkelanjutan: Tinjauan Nutrisi, Binder, dan Dampak Lingkungan
Full text linkLobster aquaculture has emerged as a strategic global sector, yet faces critical challenges in sustainable and cost-effective feed formulation. This review synthesizes findings from 15 studies (2004–2025) to analyze species-specific nutritional requirements, binder efficacy, and innovation opportunities. Lobsters require high protein (>45%) for growth (especially larvae/juveniles), with limited lipids (<10%) and moderate carbohydrates (20–35%). Nutritional imbalances reduce feed efficiency and may trigger physiological disorders. Binders like carrageenan (2–4%) and sodium alginate (3%) optimize feed stability (>4 hours) and growth performance (Panulirus argus, Homarus gammarus), while natural binders (e.g., 5% cornmeal) show inferior results. Key challenges include species-specific dietary adaptations (P. cygnus thrives on natural diets), environmental impacts of nitrogen waste, and underutilized local ingredients (e.g., shrimp waste meal). The study highlights the potential of multifunctional binders, RAS/IMTA systems, and fishery byproduct-based feeds. A holistic approach integrating precision nutrition, innovative feed technologies, and sustainable farming practices is recommended to enhance productivity and environmental sustainability. Future research should prioritize binder-microbiome interactions, standardized protocols for commercial species, and circular economy models to support Indonesia’s competitive position in global lobster markets
Pengaruh Konsentrasi Pupuk hayati dan Dosis Pupuk NPK terhadap Pertumbuhan dan Hasil Tanaman Kangkung Darat (Ipomoea reptans)
Full text linkThis study aims to determine the effect of the concentration of biofertilizer and the dose of NPK fertilizer and their interaction on the growth and yield of land kale plants. This research was conducted from January to February 2024 at Pengenjek Village, Jonggat District, Central Lombok Regency. The design used in this research is Factorial Randomized Group Design (RAK) consisting of 2 treatment factors, namely the concentration of biological fertilizer consisting of 3 levels, namely K0 (control), K1 (5 ml/L) and K2 (10 ml/L). While the second factor is the dose of NPK fertilizer consisting of 4 levels, namely D1 (1 g/plant = control) D2 (1.5 g/plant), D3 (2 g/plant), and D4 (2.5 g/plant) so that 12 treatment combinations are obtained. Each treatment consisted of 3 replicates so there were 36 experimental units. Observation data were analyzed using analysis of variance (analysis of variance) at the 5% level, treatments that were significantly different were further tested using the Honest Differences (BNJ) test at the 5% real level. The results showed that there was a real interaction between the concentration of biofertilizer and the dose of NPK fertilizer in affecting the number of plant leaves at the age of 28, 35 hst and the fresh weight of plant plants at 35 hst. Biofertilizer concentration as a single factor significantly influenced plant height at 28 and 35 hst, height increase rate, number of leaves at 28 and 35 hst, stem diameter at 28 and 35 hst, fresh weight and dry weight of plants. While the dose of NPK fertilizer as a single factor had a significant effect on plant height at 28 and 35 hst, number of leaves at 28 and 35 hst, stem diameter at 28 and 35 hst, fresh weight and dry weight. In this study, the best treatment combinations were 5 ml/L biofertilizer concentration and 1 g/plant NPK fertilizer dose and 10 ml/L biofertilizer concentration and 1 g/plant NPK fertilizer dose. while the best biofertilizer concentration treatments were 5ml/L and 10 ml/L and the best NPK 1 g/plant fertilizer dose treatment on the growth and yield of land kaleplants
Karakteristik Habitat Pohon Pakan dan Populasi Lutung di Wisata Jeruk Manis, Resort Kembang Kuning, TNGR Sebagai Upaya Konservasi
Full text linkThe study entitled Characteristics of Food Tree Habitat and Langur Population in Jeruk Manis Tourism, Kembang Kuning Resort, TNGR aims to understand the role of habitat in the survival of the Javan langur (Trachypithecus auratus), an endangered primate species. The Javan langur functions as a natural seed disperser in the forest, and its presence is very important for the plant regeneration process. This study was conducted in November-December 2024 in Kembang Kuning Village, East Lombok, using the population census method and vegetation analysis. The research method includes collecting data on the langur population through the concentration method and vegetation analysis by creating sample plots measuring 20 x 20 m. The results showed that the langur population varied in various plots, with a higher proportion of adult individuals in some locations, indicating group stability. The data also showed that the bajur tree (Pterocarpus indicus) was the main food source with a high Importance Value Index (INP) value. This study provides insight into the composition and structure of vegetation in the langur habitat, as well as the importance of conserving this species in the face of threats from hunting and habitat loss. By understanding the characteristics of the habitat and distribution patterns of the langur population
Uji Daya Hasil, Komponen Hasil, dan Morfofisiologi Beberapa Genotipe Padi Beras Merah dengan Sistem Gogo
Full text linkThis study aimed to determine the yield potential, yield components, and morphophysiology of several red rice genotypes under upland (gogo) cultivation system. The research was conducted from August to December 2024 in Wanasaba Village, East Lombok, West Nusa Tenggara. A Randomized Completely Block Design (RCBD) was used with 12 genotypes as treatments, consisting of  five lines:  19I-06-09-23-03 (G1), 21B-57-21-21-23 (G2), 23F-04-10-18-18 (G3), 23A-56-20-07-20 (G4), 23A-56-22-20-05 (G5), and 7 varieties: PBM UBB1 (G6), Danau Gaung (G7), Inpago 8 (G8), Inpago 12 (G9), Rindang (G10), Inpago Unram I (G11), and Beak Ganggas (G12), each replicated three times. The observed parameters including: relative leaf water content, chlorophyll content, number of days to flowering, number of days to harvesting, plant height, flag leaf length, total tiller number, productive tiller number, non-productive tiller number, panicle length, number of filled grains per panicle, number of unfilled grains per panicle, 1000-grain weight, weight of filled grains per clump, and yield per hectare. The data were analyzed using Analysis of Variance (ANOVA) at a 5% significance level. If significant differences were found, Duncan’s Multiple Range Test (DMRT) at the 5% level was conducted. The results of this study showed that red rice grown under upland conditions exhibited diverse yield potentials, yield components, and morphophysiological characteristics, except for traits such as number of days to flowering, leaf chlorophyll content, relative leaf water content, number of non-productive tillers, and number of empty grains per panicle. The highest yields were obtained on genotypes G4 (line 23A-56-20-07-20), G12 (Beak Ganggas), and G10 (Rindang), with yields of 5,81, 5,78, and 5,61 ton/ha respectively. Genotypes G4 and R have early harvest age, relatively moderate plant height, moderate number of productive tillers, moderate panicles, large number of filled grains with high weight of filled grains, namely G4 (36,30 grams) and R (35,10 grams). While BG (Beak Ganggas) has long panicles, large number of filled grains with high weight of filled grains, namely G4 (3605 grams), although the number of productive tillers is small
The Sifat Mekanis Self Consolidating Concrete dengan Penggunaan Coconut Shell Ash Sebagai Bahan Tambah pada Semen
No full textIn civil construction work, conreting is often becoming difficult because of limited space on concrete mold or because of congestion of reinforcement. To overcome this case, self-consolidating concrete is frequently used. This type of concrete requires Slump flow, Passing ability and Segregation resistance requirements by using cement up to 600kg/m3. The current trend in concrete technology is utuilization of Pozzolan. This research discusses the behavior of the mechanical properties of self-consolidating concrete with coconut shell ash as additives. The Coconut shell ash is produced by burning coconut shells at a temperature of 800°C for approximately 4 hours. Five series of 15x30cm concrete cylinder are prepared tested with compression loads. It is found that the coconut shell ash applied as an additive greatly affects the properties of fresh concrete. The use of coconut shell ash also has an effect on the initial setting time and final setting time of cement as well. Furthermore, the compressive strength and Modulus of elasticity of self-consolidating concrete are influenced by the use of coconut shell ash as an additive for various test ages
Produktivitas Induk Kambing Boerlok (Boer X Lokal) pada Berbagai Porsi Darah Kambing Boer
Full text linkThis study was conducted to evaluate the productive and reproductive performance of Boerlok does at different proportions of Boer goat blood. The research was carried out in areas of Boer × Local goat crossbreeding development in Lombok. The study location was determined using purposive sampling based on the breed of goats raised. A total of 90 Boerlok does were randomly selected as samples, consisting of 30 F1 Boerlok does, 30 F2 Boerlok does, and 30 F3 Boerlok does. The observed variables included body weight, body length, withers height, chest girth, days open, service per conception, service period, and kidding interval. Productive and reproductive performance data were analyzed descriptively using the mean and standard deviation (arithmetic mean ± standard deviation) according to data categories. Differences in productive and reproductive performance among goat breeds were analyzed using the t-test. The proportion of Boer goat blood had a significant effect (P < 0.05) on the productive performance of Boerlok does; higher proportions of Boer blood resulted in higher productive performance. The proportion of Boer blood in Boerlok does had no significant effect (P > 0.05) on the onset of first estrus postpartum, service period, and service per conception, but had a significant effect (P < 0.05) on first mating postpartum, days open, and kidding interva
Manajemen Pengolahan Limbah Pabrik Gula Melalui Perhitungan Potensi dan Analisis Risiko untuk Mengurangi Dampak Pencemaran Lingkungan
Full text linkSugar factories process sugar cane into staples. Processing sugar cane into sugar cane can have an environmental impact. This is also experienced by PG XYZ during the milling period. The purpose of the research at PG XYZ is to measure the environmental impact of the sugar production process through life cycle assessment and risk management. The results of the life cycle assessment study showed that the two highest impacts of the sugar production process were climate change and respiratory inorganics. The results of the life cycle assessment study became a parameter in the risk management analysis. The results of the risk analysis obtained 2 extreme category sub-risks, 3 high category sub-risks, 14 medium category sub-risks, and 17 low category sub-risks
Penilaian Kondisi Terumbu Karang Di Area Perairan Dangkal Tanjung Pantai Senggigi, Lombok Barat, Nusa Tenggara Barat
Full text linkThis study aims to assess the condition of coral reefs based on benthic composition in the shallow waters of Tanjung, Senggigi Beach, West Lombok, West Nusa Tenggara. Data collection was carried out through diving using the Underwater Photo Transect (UPT) method by analyzing 50 quadrat photos taken along a 50-meter transect line, processed with the CPCe software. The analysis revealed that live coral (Coral) was the most dominant benthic component, with an average cover of 91.38% ± 13.72%, which falls under the "very good" category. Macroalgae and abiotic components such as sand and coral rubble were present but in very small proportions. The coral community was dominated by complex growth forms such as Acropora tabular, Acropora branching, Coral foliose, and Coral massive, which are known for their relatively fast growth and adaptability to clear water with stable substrates. These findings indicate that the reef ecosystem in the waters of Tanjung Senggigi is in very good condition and provide a scientific foundation for developing effective management and conservation strategies for the area