The problem of salt production by Jeneponto Regency is influenced by the traditional way of making salt. The introduction of GFTT (Geomembrane Filter Thread Technique) as a salt-making technology is an effort to increase salt production in the Jeneponto district, both in quality and quantity. This activity was carried out in Biring Parang Jaya Village, Jeneponto Regency. Activities are carried out by applying threaded techniques to salt ponds, making filter devices on salt ponds, and installing geomembranes as salt tablets. Based on the application of technology, the salt produced by GFTT has better quality and quantity than traditional salt. Salt produced by GFTT is classified as high grade with 99.96% NaCl and 0.04% moisture content.
Endophytic bacteria are microorganisms that live in plant tissues and some of them contribute to nitrogen fixation for plants. This study aimed to isolate and identify endophytic bacteria from mangroves of Kutang Beach, Lamongan, which potentially as nitrogen fixing bacteria. Bacterial Isolates were used as candidates for biofertilizers. Leaves samples were taken from 10 sampling points. Bacterial isolation was initiated by sterilizing the surface of the leaves sample and grinding it aseptically. Isolation was carried out with a pour plate method on Nutrient Agar medium. Screening for endophytic bacteria's potential as N-fixing agent was carried out by growing the bacterial isolates on a semi-solid Nitrogen Free Bromothymol Blue (NFB) medium. The isolates that produced a positive reaction with a change in the color of the medium to blue were then subjected to macroscopic (shape, color, elevation, and the edge of the colony) and microscopic observations (Gram stain and bacterial cell measurements). The isolates showed the fastest change in the color of the medium were identified by the molecular marker of the 16S rRNA gene. The data obtained were analyzed descriptively. As many as 20 isolates were obtained from the mangroves of Kutang Lamongan Beach, and ten isolates of twenty potentially as nitrogen-fixing bacteria. The ten nitrogen-fixing bacteria isolates had varying macroscopic characteristics. The microscopic characteristics showed that eight isolates had Gram-positive bacilli, and two isolates were Gram-negative with varying bacterial sizes. Based on the 16S rRNA gene sequence, the most potential of nitrogen-fixing bacteria was LMG II-14 isolate and identified as Paenibacillus alvei LMG II-14 with 99.36% similarity to Paenibacillus alvei strain DSM 29 based on the NCBI database. The ten nitrogen fixing isolates that have been obtained can later be used as candidates for biofertilizer composition, especially Paenibacillus alvei LMG II-14.
The topographical conditions in Bulo-Bulo Village, Jeneponto Regency, South Sulawesi, tend to be bumpy and rocky, which is the main problem in farming. Locals exclusively use growing methods because there is little public awareness about cultivation technologies. The community employs a number of different fish farming systems. Additionally, the cost of fish feed has a tendency to change, making it harder for people to satisfy their needs for the primary protein source. The community can be counseled on land use by using aquaponic and aeroponic systems as a possible solution to the issue. Regardless of climatic conditions or current land characteristics, aquaponic technology is recognized as a substitute for integrated farming systems. By providing counseling, instruction, and hands-on support to the residents of Bulo-Bulo Village, the strategy is put into action. The results of this action take the shape of autonomous aquaponic and aeroponic installations that grow food crops and fish in the same space to reduce production costs and increase earnings. Every family in the community is intended to be able to benefit from this activity and use the farming technology in order to reinforce and encourage long-term improvements in the nation of Indonesia's food security.
Abstrak. Meningkatnya jumlah penduduk dunia akan membuat kebutuhan energi negara-negara di dunia meningkat termasuk Indonesia. Ketersediaan minyak bumi Indonesia semakin menipis sehingga untuk memenuhi kebutuhan minyak dalam negeri. Indonesia harus import minyak dari negara lain. Hal ini perlu adanya energi baru dan terbarukan yang mampu memenuhi kebutuhan energi dalam negeri. Salah satu energi baru tersebut yaitu bioetanol. Bioetanol merupakan penyebutan alkohol atau etanol yang bersumber dari bahan hayati, salah satunya adalah nira siwalan. Artikel ini memberikan ulasan tentang bahan bakar alternatif dari fermentasi nira lontar. Penelitian ini menggunakan metode pendekatan data sekunder sebagai sumber datanya. Adapun hasil dari telaah pustaka yang dilakukan menunjukkan bahwa, tingginya kandungan gula pada nira lontar yang berkisar antara 10-30% menjadikannya potensial untuk dikembangkan menjadi bioetanol. Namun, studi lebih lanjut harus dilakukan untuk menentukan efektivitas dan efisiensi penggunaan bahan bakar dari nira lontar pada mesin-mesin kendaraan.Kata Kunci: Bioetanol, Nira Lontar, Bahan Bakar Alternatif, Energi Terbarukan
Most of the plant-associated bacteria can synthesize active biological components of phytohormones such as auxin. This study aimed to examine the potency of 61 endophytic bacteria isolates from the mangroves at Kutang Beach, Lamongan in producing IAA hormone and to identify types of isolates effecting the concentration of IAA, morphological characteristics of isolates, as well as endophytic bacterial species that have the most potential to produce IAA hormone. Screening of endophytic bacteria isolates was performed using the colorimetric method and the production of IAA was carried out using the spectrophotometric method. IAA production by endophytic bacteria was analyzed descriptively and statistically. One-Way ANOVA was employed to determine the effect of the isolate type on the concentration of IAA. The most potential isolates to produce IAA hormone are identified by 16s rRNA gene marker. The screening results showed that 12 isolates of endophytic bacteria have the potential to produce IAA hormones (2.0-9.3 ppm), coded with LMG 7, 15, 31, 32, 43, 53, 54, 55, 56, 57, 62, and 63. The results of the One-Way ANOVA test suggested that the type of isolates did not affect the concentration of IAA produced by endophytic bacteria. The twelve isolates had different morphological characters and those were Gram-positive bacilli with cell sizes ranging from 1.5 µm - 3 µm. The highest concentration of IAA was produced by LMG 15 (9.3 ppm). LMG 15 was identified as Bacillus cereus strain LMG 15, having 99.33% similarity to Bacillus cereus strain IAM 12605.
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