Jurnal Sains Teknologi dan Lingkungan (JSTL)
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Perbandingan Stok Karbon Berbasis Penggunaan Lahan dan Rencana Pola Ruang pada Wilayah Perencanaan III Kota Singkawang: Comparison of Carbon Stock Based on Land Use and Spatial Pattern Plans in Planning Area III of Singkawang
Get PDFClimate change is a strategic global issue and its concern to many regions in Indonesia because it will impact the sustainability of many sectors. One of the causes of climate change is the existence of Green House Gases (GHG), especially carbon dioxide (CO2), which has the highest concentration in the atmosphere due to human activities. Massive development activities have caused the dynamics of changes in land use from undeveloped land to built-up land. Singkawang City Singkawang City has a population that continues to increase, namely in the period 2010-2020 it has a population growth rate of 2.27%. This of course can trigger a conflict of space requirements that are not proportional to the availability of existing land. Planning Area (WP) III of Singkawang City, which currently has a higher proportion of undeveloped land than built-up land, will faced challenges, due to the many development plans such as airports, industrial allotment areas and other supporting facilities. Of course, this will triggered changes in land use functions which can reduce carbon stocks. Therefore, the purpose of this study is to compare carbon stocks based on existing land use classes and the area of each type of money polar plan according to the Detailed Spatial Plan (RDTR) of WP III. The analytical method used is to analyze carbon stocks using conversions from the 2012 Directorate General of Forestry Planning standards and using the GHG calculator developed by ICLEI-Local Governments for Sustainability. The result of this study is that there is a decrease in carbon stocks in the spatial pattern plan (233.267,15 tons C) compared to carbon stocks based on the existing land use class in WP III (236.224,78 tons C). This shows that there is a difference of 2.957,63 tonnes C or a decrease in carbon stocks of 1,3%
Hubungan Body Condition Score dengan Service Per Conception pada Induk Sapi Bali di Dusun Tempos Desa Tempos Kecamatan Gerung Lombok Barat : The Relationship Between Body Condition Score and Service Per Conception in Bali Cow in Tempos Subvillage Tempos Village Gerung District Lombok Barat
Get PDFThe purpose of this study was to determine the relationship between Body Condition Score and Service Per Conception in Bali Cows in Tempos subvillage, Tempos Village, Gerung District, West Lombok Regency. The method used in this study is observational with a longitudinal study type. The sample used in this study was 30 Bali cattle. The observed variables are Body Condition Score (BCS) and Service Per Conception (SC). The results showed that the results of simple linear regression analysis obtained an F count of 28.615 with a significance of 0.000. the result of the correlation between Body Condition Score (BCS) and Service Per Conception (S/C) is -0.711 with a significant value of 0.000. R2 = -0.711. The coefficient of determination (KD) is 54.8%. It can be concluded that there is a relationship between Body Condition Score and Service Per Conception in Bali Cows in Tempos Hamlet, Tempos Village, Gerung District, West Lombok Regency with a contribution size of 54.8%
Kemampuan Penyerapan dan Reduksi Lengas Tanah Pada Media Polybag Kombinasi Tanah dan Kompos: Soil Moisture Absorption dnd Reduction Capability In Polybag Media Combination of Soil and Compost
Get PDFSoil moisture is an important factor needed by plants for growth, and therefore the amount of soil moisture that can be stored depends on the type of soil or the composition of the soil-forming materials. Compost is one of the nutrients that is often used in the manufacture of planting media on land in the form of polybags, and the amount of compost composition on the soil is thought to greatly affect the ability to store water in the media. This study aims to test drip irrigation on a mixture of compost and soil on storage of irrigation water. Tests were carried out at a ratio of 70%: 30%, 50%: 50% and 30%: 70%. Irrigation was tested at a duration of 5 minutes, 10 minutes, and 15 minutes, and the data analyzed included irrigation distribution data, discharge, soil moisture data (w) and daily soil moisture change data. The results of the analysis are presented in the form of tables and graphs, then discussed and concluded descriptively. The results of the analysis show that the flow rate obtained is greater if the difference in water level to the land is greater, and the average Cu value obtained is 95.79% which is very good. With initial soil moisture in the range of 19%-25, soil moisture gain obtained by drip irrigation for 5 minutes -10 minutes is around 12%, and for a duration of 15 minutes soil moisture gain is obtained by 8% -21%. The lowest recharge was obtained on land with 30% soil and 70% compost of 8%-12%. The amount of soil moisture reduction after 24 hours of irrigation test was 6% - 17%, the lowest reduction was at 70% compost and 30% soil around 6%
Identifikasi Sebaran Spasial dan Kerapatan Mangrove Gili Lawang menggunakan Citra Landsat 9 OLI-2/TIRS-2: Identification Gili Lawang Mangrove Spatial Distribution and Density with Landsat 9 OLI-2/TIRS-2 Imagery
Get PDFMangrove ecosystems have a great influence on the sustainability of human life and the environment. The high level of vulnerability of mangrove ecosystems has implications for the importance of quality planning. This study aims to identify the spatial distribution and density of mangrove forests in Gili Lawang using Landsat 9 OLI-2/TIRS-2 satellite imagery. Data processing is done with the help of the QGIS 3.30 application. Data processing consists of band combinations, image classification with the SVM algorithm, classification results accuracy test, NDVI value extract, and reclass NDVI. The results showed that the use of band 564 in Landsat 9 imagery visually resulted in an increase in sharpness in identifying mangrove ecosystems. Classification of objects with the SVM algorithm has overall accuracy and kappa accuracy > 80%. The identified area of Gili Lawang is 432.72 ha, consisting of 37.89 ha of mangroves, 58.11 ha of non-mangrove and 3.75 ha of water bodies. NDVI values at the study sites ranged from 0.068 to 0.87. The maximum NDVI value is found in mangrove objects, while the minimum NDVI value is found in water body objects. Mangrove density in Gili Lawang is dominated by high and very high density. The use of Landsat 9 OLI-2/TIRS-2 imagery in the future is expected to provide positive benefits in providing data and information related to natural resources.
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Pemberian Daun Pepeya (Carica Papaya Linn) terhadap Kecernan Nutrisi Pakan dan Performa Ayam Joper : Determine the effect of giving papaya leaves on the digestibility of feed nutrients and the performance of Joper Chikens
Get PDFThe research aimed at determaining the effect of giving papaya leaves on the digestibility of feed nutrients and the performance of Joper chikens has been carried out at the Teaching Farm of the Faculty of Animal Husbandry Unram Lingsar, Lingsar District, West Lombok. 100 Joper chickens aged 1 week were grouped into 5 treatment groups (P0, P1, P2, P3, P4) each group consisting of 4 replicates, each repetition consisting of 5 individuals. The feed given was CP511B and CP512B complete feed with a protein content of 18-19% and papaya leaves were given through drinking water in the form of juice. Each treatment was given papaya leaf juice as much as 5 ml/liter of drinking water (P1), 8 ml/liter of drinking water (P2), 11 ml/liter of drinking water (P3), 14ml/liter of drinking water (P4) and drinking water without papaya leaf juice ( P0) adlibitum. The variables measured were feed consumption, body weight gain, feed conversion. crude protein digestibility, crude fiber digestibility. Research data were analyzed by analysis of variance on the basis of a completely randomized design. The results of the study showed, feed consumption, body weight gain, feed conversion, crude protein digestibility, crude fiber digestibility of the five treatments was not significantly different (P>0.05). Beconcluded that determain of papaya leaf juice through drinking water up to 14 ml/liter of drinking water did not affect feed consumption, crude protein digestibility, crude fiber digestibility, body weight gain and feed conversion of Joper Chickens
Efektifitas Tanaman Refugia Kacang-Kacangan Menangkal Intensitas Serangan Hama Ulat Grayak (spodoptera exigua Hubner.) Pada Bawang Merah: Effectiveness of Bean Refugia to Prevent Intensity Attacks of Armyworm Pests (Spodoptera exigua Hubner.) On Shallots
Get PDFThis experimental research aims to obtain the type of legume refugia plant that is most effective in preventing invasion, colonization and intensity of attack by the Spodoptera exigua Hubner pest on shallot. The experiment was designed with a randomized block design consisting of six treatments of various refugia plants, namely shallot plants without refugia treatment (Ro), shallot plants with refugia treatment peanuts (R1), soybeans (R2), green beans (R3), red beans (R4) and cowpeas (R5), which are planted in two rows on the side of the bund at a distance of 10 cm from the outermost row of shallot plants. Observation parameters were egg population, larvae, intensity of S. exigua pest attack and weight of fresh shallot bulbs. The variety of refugia plants from the legume group influences invasion, colonization and the intensity of Spodoptera exigua Hubner pest attacks. on red onions. Peanut and cowpea refugia plants planted in two rows on the sides of the shallot mounds, are very effective in preventing invasion, colonization and the intensity of Spodoptera exigua Hubner pest attacks, so that the shallot plants experience very light disturbance with an attack intensity of 2,522% – 4,432 %, which is in the very low category. As a result, the yield of fresh shallot tubers obtained was significantly higher compared to shallot plants without refugia plants and with refugia plants of soybeans, green beans and red beans. Soybean, green bean and red bean refugia plants are not effective in preventing Spodoptera exigua Hubner pest attacks on shallots because the plants experience attack intensity from the age of 49 HST – 63 HST of 21.86% - 23.34% with the attack intensity being in the medium category
Efek Tipe Kelahiran Terhadap Estrus Post-Partum Induk Sapi Bali Akseptor Inseminasi Buatan : Birt Type Effect on Post-Partum Etrus of Bali Cow Acceptor of Artificial Insemination
Get PDFCases of dystocia is impact on delaying uterine involution, post-partum estrus and the next mating. Research has been carried out about type of birth process and its effect on post-partum estrus post-artificial insemination (AI) of Bali cows in Pujut District, Central Lombok Regency. The aim was to determine the effect of the type of birth process on post-partum estrus of cows. The research used descriptive method with the material were 40 Bali cows in 4 (four) villages, namely Pengengat, Teruwai, Mertak and Bangket Parak. The research variables were the type of birth process and post-partum estrus, as well as supporting variables such as the age of cow, body condition score (BCS), body weight, type of bull semen and days open. The data were statistically analyzed including the mean, standard deviation and percentage, followed by t-test. The results showed that 52.25% of Bali cows in Pujut District gave birth normally and 47.5% suffer light dystocia with birth assistance. The mean age of cows with dystocia was 29.53 ± 5.72 months by the BCS of 2.53, compared to 31.62 ± 5.61 months by the BCS of 2.81 in normal birth. The mean weight was 319.00 ± 29.72 kg compared to 342.81 ± 49.36 kg. The mean days open was 199.13 days compared to 195.67 days and post-partum estrus was 122.00 days compared to 105.00 days. In conclusion, the onset of post-partum estrus and days open in Bali cows that suffer light dystocia with birth assistance is longer than normal birth
Penyisihan Logam Fe Pada Air Gambut Menggunakan Membran Chitosan Sebagai Adsorben: Removal of Fe From Peat Water Using Chitosan Membrane As Adsorbent
Get PDFPeat water in terms of quality cannot be used as a source of clean water or drinking water, so it needs to be processed. One alternative treatment that can be used is the adsorption process with a column system using a chitosan membrane (the content of amine groups contained in the chitosan membrane has a good ability to absorb metals). This study aims to remove Fe metal in peat water. Variations carried out were Fe concentrations of 2, 3 and 4 mg/L and flow rates of 2, 3, 4 and 5 mL/minute. The results obtained are the best Fe metal removal efficiency of 92.20% with a final concentration of 0.312 mg/L at an Fe concentration of 4 mg/L and a flow rate of 2 mL/minute. The results of the study have met the quality standards set by the Minister of Health of the Republic of Indonesia Number 32 of 2017 concerning Sanitary Hygien
Pengukuran Kekuatan Sinyal Receive Strangth Signal Indicator (RSSI) 4.5G VoLTE Provaider Telkomsel di Universitas Mataram: Signal Strength Measurement Receive Strangth Signal Indicator (RSSI) 4.5G VoLTE Provider Telkomsel at the University of Mataram
Get PDFThis is an initial study to determine the quality of the 4.5G VoLTE signal in the area around the University of Mataram campus. This is done to get the Receive Strangth Signal Indicator (RSSI) measurement emitted by the Base Transceiver Station (BTS) owned by the Telkomsel provider at FMIPA because the VoLTE signal is unstable. The measurement method used is the drive-test. But the results are not entirely as desired. Because in some places it turns out that the quality of receiving power is very weak. Measurements obtained by drive-test carried out in the morning, afternoon, evening and night, obtained the difference in the average signal, the value of each measurement place so that it can be read more quickly converted from numbers to colors. The measurement results and theory were compared so that the RSSI level at Mataram University was obtained
Aplikasi Irigasi Tetes Bertingkat Dengan Tanaman Horti Kultura di Perumahan Padat Penduduk Kota Mataram Hulu: Application Of Dropping Irrigation With Horti Culture in Solid Population Housing in Mataram Hulu City
Get PDFThis study aims to determine the application of a three-storey drip irrigation system to horticultural crops of chilies, kale and eggplant as one of the household food supporting crop commodities. In addition to increasing the potential for irrigation and boosting the economy from agricultural products on this limited land, it is necessary to know this, so that it can be used as material for consideration in maintaining family food security. Irrigation test activities were also carried out on irrigation uniformity, irrigation distribution and irrigation depth at various irrigation times. Tests were carried out on variations of soil and compost as planting media with the ratios of: 70%: 30%, 50%: 50%, 30%: 70% and four variations in tank water volume. The drip application network uses ½†PVC pipe and dripe on the third floor, while for the first and second levels the Netafim (NTF) pipe is 12 mm. The secondary irrigation network uses ¾ inch, 1 ½ inch and ½ inch PVC in an irrigation test chamber measuring 1.5 m x 4 m and a height of 1 m between levels. The results of the analysis of the test data showed that the uniformity of PVC drip irrigation and NTF combined obtained an average of above 95%, with a very even distribution of water. Irrigation depth obtained at all variations of the water tank level, that is, at 70% of the soil ranges from 3cm -20 cm, at 50% of the soil ranges from 4cm - 20cm and at 30% the amount of infiltration ranges from 2.5 cm - 18.5 cm. Multilevel drip irrigation can support the provision of family food in meeting the needs of kitchen ingredients such as chilies and vegetables to support family food securit