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Jurnal Sains Teknologi dan Lingkungan (JSTL)
Published by Universitas Mataram
ISSN : 24770329     EISSN : 24770310     DOI : -
Core Subject : Health, Science, Agriculture,
Agriculture, Biological Sciences & Forestry Computer Science & IT Public Health
Jurnal Sains Teknologi dan Lingkungan (JSTL), merupakan media untuk publikasi tulisan asli yang berkaitan dengan sains teknologi dan lingkungan baik dalam Bahasa Indonesia maupun Bahasa Inggris. Jurnal Sains Teknologi dan Lingkungan (JSTL) merupakan jurnal ilmiah terbitan berkala dua kali setahun (Juni dan Desember).
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Articles 335 Documents
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Variasi Penempatan Bronjong Di Hilir Kolam Olak Terhadap Pola Gerusan Dasar: Variations in the Placement of Gabions in the Downstream of the Pool Against Basic Scouring Pattern I Dewa Gede Jaya Negara; Salehudin Salehudin; Lilik Hanifah; I Wayan Yasa; Ni Putu Ira Sintia Kurnianti
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 8 No. 1 (2022): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v8i1.300

Abstract

The existence of a weir is often disrupted by the occurrence of scouring downstream, which results in an insecure weir position. This study aims to determine the effect of installation of gabion variations downstream of stilling ponds on the depth and length of scour at the bottom of the channel. The test was carried out at the Hydrology and Coastal Laboratory of FT Unram in a straight channel with dimensions of 7.5 m x 0.55 m x 0.5 m, with an Ogee type spillway and a USBR Type III stilling pond. The dimensions of the test gabions are 0.55 m x 0.18 m x 0.09 m with a gravel diameter of 1 (P1 ) 0.035 m, (P2 ) 0.0175 m and (P3 )0.00875 m, and the variation of discharge 1(Q1) 0.0019 m3/s, discharge 2(Q2) 0.0036 m3/s, discharge 3 (Q3) 0.0047 m3/s and discharge 4 (Q4) 0.0065 m3/s. The results showed that in conditions without gabions, scour was prone to occur near the end of the stilling pond to the center of the channel bottom and towards the right side of the channel, with a scour depth of 0.002m – 0.023m and a length of 0.075m – 0.45m. For conditions with gabions, the scour length ranges from 0.15m – 0.275m with a depth of 0.0016m – 0.026 m, the scour occurs more evenly to the left and right of the channel.  
Pemanfaatan Pupuk Hayati-fosfat untuk Meningkatkan Pertumbuhan Tanaman Jagung (Zea mays L.) di Entisol: Utilization of Biofertilizer-Phosphate to Increase Growth of maize (Zea mays L.) in Entisol Lolita Endang Susilowati; Mahrup Mahrup; Zaenal Arifin; Sukartono Sukartono
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 8 No. 1 (2022): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v8i1.313

Abstract

Entisols are low fertility soils that require high doses of inorganic fertilizers to support plant growth. On the other hand, it was reported that biofertilizers can be applied to support plant growth. The purpose of this study was to examine the ability of bio-phosphate fertilizers to affect plant growth. The greenhouse experiment was arranged according to a completely randomized design, consisting of five treatments of different fertilization  and each treatment was repeated four times. Experimental treatments were P1) control; P2) biological-phosphate fertilizer treatment; P3) treatment of NPK fertilizers; P4) integrated fertilizer treatment of 2 combinations of fertilizers (biological-phosphate & NPK); P5) integrated treatment of 3 combinations of fertilizers (biological-phosphate, NPK & organic). The dose of NPK fertilizer is 75% of the recommended dose. The experimental soil has a sandy loam texture, pH-soil 6.01, content of C-organic1.20%, N-total 0.09%, P-available 5.68 ppm and Kdd 0.31cmol/kg. The results showed that the application of a single biological phosphate fertilizer had no significant effect on plant growth compared to the control. A significant effect was obtained on integrated fertilization, both with two combinations of fertilizers (P4) and with three combinations of fertilizers (P5). The highest plant growth rate, with reference to the total dry biomass of plant shoots and roots, was obtained in treatment P5 with plant growth rates reaching 232.14% higher than the single treatment of biological fertilizers (P2), 53.70% higher than the single treatment of NPK fertilizers (P3) and 16.35% higher than the integrated treatment of two combinations of fertilizers (P4).
Karakterisitik Meso-Size Marine Debris di Kawasan Wisata Pesisir Barat Kota Mataram: Characteristics of Meso-Sized Marine Debris in Tourist Destinations on the West Coast of Mataram City Ayu Adhita Damayanti; Chandrika Eka Larasati; Sadikin Amir; Bagus Dwi Hari Setyono; Dewi Putri Lestari
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 8 No. 1 (2022): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v8i1.314

Abstract

Marine debris severely threatens the balance of marine ecosystems. Toxic waste content can contaminate water and substrates. The physical form of hard and sharp waste material can hurt marine organisms. This research aims to analyze the characteristics of meso sized marine debris in tourist destinations on west coast of Mataram city. Samples were collected at two stations that representing the tourist destinations on west coast of Mataram City, namely Penghulu Agung Beach and Ampenan Beach. Waste measurement using a 3 transect system measuring 10x10 m which is divided into 10 plots measuring 1x1 m for each station. Waste observed in this research was meso-size marine debris. Each item were identified, then calculated for relative density and density per item based on number and weight. Based on the results of the research, 10 categories of waste were obtained at both stations. This type of waste includes plastic, rubber paper, textiles, wood, metal, glass, ceramics, hazardous and toxic materials (B3), and other waste. Plastic waste dominates at both stations, reaching 68% for Station I and 75% for Station II. The density of waste is higher at Station II with an average of 8.67 items.m-2 compared to Station I with an average of 3.33 items.m-2. At Station I there is an average of 2.27 items.m-2 of plastic waste while in station II, plastic waste is much higher, which is 6.47 items.m-2. The average weight of total meso-sized waste collected from stations I and II is 2.78 g.m-2. Station I has a total waste weight of 0.56 g.m-2 and station II weight 4.99 g.m-2. The highest waste weight is for plastic waste type which is 0.24 g.m-2 at station I and 2.49 g.m-2 at station II.
Kelimpahan Dan Distribusi Fitoplankton Di Wilayah Perairan Mangrove Morosari, Demak: Abundance And Distribution Of Phytoplankton In The Mangrove Water, Morosari, Demak Oktavianto Eko Jati; Arif Rahman; Kukuh Prakoso
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 8 No. 1 (2022): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v8i1.315

Abstract

The Demak area is an area that has changed its ecological function from land to water. This area has a mangrove ecosystem which is a conservation area. The fertility of the mangrove ecosystem is supported by the presence of nutrients in the waters. Nutrients in the waters will also affect the abundance and distribution of phytoplankton. The purpose of this study was to determine the levels of nitrate, phosphate, and the abundance and distribution of phytoplankton in the Morosari Demak mangrove conservation waters, and to determine the relationship between the abundance of phytoplankton and the levels of nitrate and phosphate in the waters. This research was carried out in May 2018 in the Morosari waters area, Demak. The sampling location consisted of 6 stations. The variables measured in this study included dissolved oxygen, pH, salinity, water temperature, nitrate, phosphate, and abundance of phytoplankton. The results showed that dissolved oxygen levels ranged from 2.18-6.11 mgL-1, pH 6.12-7.38; salinity between 18.43-31.84 o/oo; water temperature between 27.18 - 30.43 °C, nitrate 0.0029-0.2495 mgL-1; phosphate 0.0013-0.11 mgL-1. The abundance of phytoplankton obtained from this study ranged from 5,700 – 24,942 cells L-1. The dominant type of phytoplankton came from the genus Guinardia (diatom class/Bacillariophyceae) which was found in all research sites
Pemetaan Spasial Kadar Kobal pada Endapan Laterit dengan Metode Ordinary Cokriging dan Inverse Distance Weighting: Spatial Mapping of Cobalt Content in Laterite Deposits Using Ordinary Cokriging Method and Inverse Distance Weighting Hendro Purnomo; Shilvyanora Aprilia Rande; Rizqi Prastowo
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 8 No. 1 (2022): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v8i1.317

Abstract

Cobalt is a metallic element that can be found in laterite deposits with varying concentration in each lithology zone. Objective of this study was to compare the performance of the ordinary cokriging (OCK) and inverse distance weighting (IDW) in mapping the cobalt content of laterite deposits. Cross variogram analysis used the covariable Ni and Fe, and the selection of the variogram model used the residual sum of square parameter. The IDW interpolation process uses power 1 and 2. The determination of the best method is based on the mean error parameter, and the root mean square error. Meanwhile, to determine the accuracy of the OCK estimation results, the root mean square standardized prediction error is used. The study indicates that the performance of the OCK interpolation is better than IDW, with overestimated predictions. The results of OCK interpolation showed that the distribution of 0.1-0.18% cobalt spread in the northern part and narrowed in the southern part of the study area.
Meningkatkan Perkecambahan Biji Kelor (Moringa oleifera Lam.) Tersimpan Menggunakan Asam Giberelat: Improving the Germination of Kelor (Moringa oleifera Lam.) Seeds Stored Using Gibberellic Acid Bambang Budi Santoso
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 8 No. 1 (2022): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v8i1.339

Abstract

Gibberelin (Gibberellic acid) is a plant hormone that is responsible for the seed germination process. Germination is the process by which an inactive embryo grows and eventually forms a seedling and subsequently produces a seedling. A total of 50 seeds of Moringa (Moringa oleifera Lam.) which have been stored for 12 months and 24 months were soaked in different concentrations of Gibberellin solution (0 mg/L; 2.5 mg/L, 5.0 mg/L, 7.5 mg/L, dan 10.0 mg/L) for 24 hours and then sown in a bath soil-sand-husk charcoal (1:1:1 v/v) germination. Since 10 days after planting the seeds, observations and calculations were made on the number of seeds that germinated, the number of abnormal germinations, and the number of days when 50 percent of the seeds germinated. The results showed that the number of seeds and the speed of seed germination were proportional to the concentration of Gibberellins. Seeds treated with high concentration of Gibberellin (9 mg/L) had the highest number of germination seeds compared to seeds with lower concentration of Gibberellin. Without giving Gibberellins from the outside, Moringa seeds that have been worn out (stored 1-2 years) were not able to germinate properly.
Penggunaan Maggot (Hermetiaillucens) Dalam Pakan Ayam Ras Petelur: The Use of BlackSoldierFlyer (Hermetia illucens) Larvaein Feed of Laying Hens Sumiati Sumiati; D. K. Purnamasari; Erwan Erwan; Syamsuhaidi Syamsuhaidi; K.G. Wiryawan; Ahmad Nur Alfin Rizki; Mujaddid Isnaini
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 8 No. 1 (2022): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v8i1.340

Abstract

The research aimed to determine the use of Hermetia Illucens maggot in feed on the production of laying hens. 80 laying hens aged 6 months were grouped into 4 treatment groups,5 replicates, each replication consisted of 4 tails. The feed provided consisted of 50% corn+20.47% rice bran+29.52% layer concentrate (P0), 45% corn+27% rice bran+23% layer concentrate+5% maggot (PI), 45% yellow corn +27.73% rice bran+17.27% layer concentrate+10% maggot (PII), 40% corn+34.33% rice bran+10.67% layer concentrate+15% maggot ( PIII).. The data obtained were analyzed by a completely randomized design. The results of the study average daily egg production for each treatment were 61.97% (P0), 73.57% (PI), 64.10% (PII) and 59.65% (PIII). The average egg weight was 55.35g/egg/head (P0), 556.47g/egg/head (PI), 55.75 g/egg/head (PII) and 55.84g/egg/head (PIII). Feed consumption was 110.23 g/head/day (P0), 112.21g/head/day (PI), 111.75g/head/day (PII) and 103.55g/head/day. Feed conversion was 3.45 (P0)., 2.81 (PI), 3.20 (PII) and 3.21 (PIII). Egg protein was 12.17% (P0), 12.98% (P1), 13.83% (PII), 14.53% (PIII). Egg cholesterol was 149.25mg/dl (P0), 153.75mg/dl (P1), 181.25mg/dl (P2) and 175.00mg/dl (P3). Beconcluded that the use of Hermetia Illucens maggot 5%, 10%, 15% in feed has not significant effect (P>0.05). on the egg production, egg weight, consumption and feed conversion and significant effect (P< 0.05) on the protein and colesterol of laying hens.
Dampak Perubahan Tata Guna Lahan dan Implikasinya terhadap Besaran Debit Banjir pada Kawasan Ekonomi Khusus (KEK) Mandalika: Impact of Land Use Change and its Implications for Flood Discharge in the Mandalika Special Economic Zone (SEZ) Muh Bagus Budianto; Bambang Harianto; Salehudin Salehudin; Hartana Hartana; Syamsul Hidayat
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 8 No. 2 (2022): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v8i2.334

Abstract

Land use change is one of the factors that affect changes in flood discharge in watersheds. Currently, the Mandalika Resort area has been designated as a Special Economic Zone (SEZ) so that large-scale development occurs in the Mandalika area with an area of 1,035.67 Ha. The purpose of this study was to determine the effect of changes in land use at the Mandalika resort on flood discharge in the watersheds in the Mandalika SEZ, namely the Balak, Ngolang and Tabelo watersheds. The data used are rainfall data, watershed maps and land use. Rainfall data is needed for analysis of hourly rainfall distribution, the method used is the Alternating Block Method (ABM). Land use maps and their changes are used to obtain Curve Number (CN) values. These parameters are used as input into the HEC-HMS software. The results of the analysis show that changes in land use have caused the CN value of the Balak watershed to increase by 1,33% in 2030 and increase by 3,72% in 2045, the CN value of the Ngolang watershed increase by 3,24% in 2030 and increase by 6,49% in 2045 and the value of the CN DAS Tableo will increase by 0,12% in 2030 and increase by 0,59% in 2045. Changes in land use have also resulted in an increase in flood discharge at various return periods. In the Balak watershed it will increase by an average of 1,76% in 2030 and 4,94% in 2045, the flood discharge in the Ngolang watershed will increase by an average of 4,00% in 2030 and 8,67% in 2045 and in the Tebelo watershed it will increase by an average 0,17% in 2030 and 0,79% in 2045.
Karakterisasi dan Keragaman Genetik Mutan Padi Inpago Unram 1 Generasi Kedua (M2) Akibat Iradiasi Sinar Gamma: Characterization And Genetic Diversity Of Inpago Unram 1 Rice Mutants Of Second Generation (M2) Due To Gamma Ray Irradiation Ni Wayan Sri Suliartini; Mita Sapitri; I Wayan Sudika; I Gusti Putu Muliarta Aryana; Anak Agung Ketut Sudharmawan
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 8 No. 2 (2022): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v8i2.364

Abstract

This study aims to determine the quantitative character of the mutant genotype (M2) and the genetic diversity of the mutant (M2) due to gamma ray irradiation. This experiment was carried out from June to October 2021 in Nyurlembang Village, Narmada District, West Lombok Regency, West Nusa Tenggara, using a Randomized Block Design (RAK) in a partitioned design with a total of 27 treatments consisting of 24 mutant plant genotypes and 3 comparison plants. The results of the observations were analyzed using analysis of variance at a level of 5%, then significantly different treatments were further tested using the Central Significant Difference (BNT) test at a level of 5%. The results showed that gamma ray irradiation caused differences in the characters of each genotype, including the character of plant height, panicle length, number of empty grains, flowering age, and harvest age. The genetic diversity of the M2 generation mutant brown rice (Inpago Unram Satu) due to gamma ray irradiation of 200 Gy shows the character of the number of filled grain, the number of empty grains, and the weight of the filled grain, while other characters have a narrow genetic variation.
Rancang Bangun Penangkap Embun Untuk Meningkatkan Efisiensi Aplikasi Pengabut Air Sebagai Model Mitigasi Urban Heat Island Masa Depan: Design And Construction Of Dew Catchers To Increase The Efficiency Of Water Sharing Applications As A Future Urban Heat Island Mitigation Model Andreas Luis; Daniel Wolo; Insar Damopolii
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 8 No. 2 (2022): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v8i2.368

Abstract

This research was conducted to develop a dew-catching vehicle that will be used to support the application of a water misting system. The dew catcher design is expected to overcome the problem of too large a mist grain diameter in low-pressure water misting applications. The study was conducted using a 110 psi pressure pump and ten nozzles measuring 0.3 mm that sprayed mist from a height of 2 M. In this study, and the dew catcher design used can overcome the disturbance of water droplets due to the production of too large mist grains at low pressure misting. The maximum temperature drop that can be achieved is 7.6°C.

Page 14 of 34 | Total Record : 335

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