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Jurnal Serambi Biologi
Published by Universitas Negeri Padang
ISSN : -     EISSN : 27222829     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology
Artikel ilmiah yang dipublikasi adalah artikel dalam bidang biologi (biodiversitas, biosistematika, ekologi, fisiologi, genetika dan bioteknologi, biokimia) yang meliputi semua bentuk mahluk hidup mulai dari mikroba, fungi, tumbuhan, hewan, manusia dan virus
Arjuna Subject : Biokimia, Genetika dan Biologi Molekuler - Biologi Perkembangan
Articles 187 Documents
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The Role of Phosphate Solubilizing Bacteria in Sustainable Agriculture Arlina, Sistika; Advinda, Linda; Chatri, Moralita; Putri, Dwi Hilda
Jurnal Serambi Biologi Vol. 9 No. 1 (2024): Jurnal Serambi Biologi
Publisher : Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/srmb.v9i1.338

Abstract

The repeated and unwise use of chemical fertilizers agricultural land can cause various negative impacts such as disrupting natural microbes and losing soil fertility. Phosphate solubilizing bacteria are soil bacteria that can convert phosphate from insoluble to soluble so that it can be absorbed by plants. Phosphate solubilizing bacteria play an important role in increasing plant productivity. Although the availability of phosphorus (P) in soil is in high concentrations, only 0.1% of the total phosphorus is available to plants and represents a small portion of the total in the soil. This occurs because of the low level of solubility of phosphorus and its fixation ability in the soil with several other metal elements in the soil such as Al, Ca, Fe to form aluminum phosphate, calcium phosphate and iron phosphate. There is no availability of phosphate for plants so that the role of phosphate-soluble bacteria is needed which plays a role in providing phosphate for plants so that it can increase agricultural yields. Phosphate solubilizing bacteria have great potential as biofertilizers because they can increase the bioavailability of phosphorus for plants, promote sustainable agriculture, and increase soil fertility, and increase crop yields.
Kontribusi Pupuk Organik Kotoran Sapi Terhadap Tinggi Tanaman Padi (Oryza sativa L.) Syahfitri, Aulia Insyani; Anhar, Azwir; Violita, Violita; Kardiman, Reki
Jurnal Serambi Biologi Vol. 9 No. 1 (2024): Jurnal Serambi Biologi
Publisher : Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/srmb.v9i1.339

Abstract

Continuous use of inorganic fertilizers on rice plants has a negative impact on soil productivity and the environment so that plant growth is disrupted. Therefore, it can be used to reduce the impact of using inorganic fertilizers by using organic fertilizers. This research aims to determine the effect of the composition of organic cow dung fertilizer and inorganic fertilizer on the growth of rice plants which was carried out from July to November 2023 at the Plant Physiology and Wire House Laboratory, Department of Biology, Faculty of Mathematics and Natural Sciences, Padang State University. This research was structured using a Completely Randomized Design (CRD) consisting of 6 treatments and 4 replications. The treatment given consisted of A = 100% NPK Fertilizer + 0% Cow Manure, B = 80% NPK Fertilizer + 20% Cow Manure, C = 60% NPK Fertilizer + 40% Cow Manure, D = 40% NPK Fertilizer + 60% Cow Manure Fertilizer, E = 20% NPK Fertilizer + 80% Cow Manure Fertilizer, F = 0% NPK Fertilizer + 100% Cow Manure Fertilizer. The results showed that the influence of the composition of inorganic NPK fertilizer and organic cow dung fertilizer for rice plants had no significant effect on plant height at 15, 30, 45 and 60 HST.
Optimization of Agricultural Waste as an Alternative Media for the Production of Xylanase Enzymes by a Consortium of Thermophilic Bacteria Febriana, Tiara; Irdawati
Jurnal Serambi Biologi Vol. 9 No. 2 (2024): Jurnal Serambi Biologi
Publisher : Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/srmb.v9i2.342

Abstract

The xylanase enzyme is an extracellular enzyme that is capable of hydrolyzing hemicellulose into xylooligosaccharides and xylose. One of the benefits of the xylanase enzyme is as a paper and pulp bleach. This enzyme is produced by thermophilic bacteria with the substrate contained in Beechwood Xylan. However, using Beechwood Xylan is expensive, so other alternatives are needed at more affordable prices. Agricultural waste is believed to be able to replace Beechwood Xylan because it contains xylan. The aim of this research is to find the best waste substrate to replace Beechwood Xylan as a medium for a consortium of thermophilic bacteria to produce xylanase enzymes. This research was conducted at the Microbiology Laboratory, Faculty of Mathematics and Natural Sciences, Padang State University in December 2023. The method used was descriptive, using 3 types of agricultural waste, namely straw, rice husks, and corn with samples of thermophilic bacteria SSA2, SSA3, and SSA4. Enzyme activity was measured using a spectrophotometer with a wavelength of 540nm. The data obtained is analyzed and displayed in tabular form. The results of this study show that straw has the highest average xylanse enzyme activity of 9,289 Units/mL, and husks have the lowest average enzyme activity of 6,161 Units/mL.
Estimation Carbon Stocks of Mangrove Stands in Nagari Pilubang, Sungai Limau District, Padang Pariaman Regency Afriona, Nada; Putri, Irma Leilani Eka
Jurnal Serambi Biologi Vol. 9 No. 2 (2024): Jurnal Serambi Biologi
Publisher : Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/srmb.v9i2.345

Abstract

Mangrove ecosystems are one of the ecosystems that play a role in reducing carbon emissions in the air and storing carbon from the air in the form of biomass. Research on the estimation of carbon stocks is needed to support climate improvement in the world due to global warming. The purpose of this study was to determine the estimated amount of carbon stocks of mangrove stands in Nagari Pilubang, Sungai Limau District, Padang Pariaman Regency. The method used is purposive sampling carried out at three stations with varying mangrove ecosystem conditions. Each research station is divided into three research plots. To calculate the value of stand biomass used allometric equations, carbon stock estimates are obtained from the value of mangrove stand biomass. Based on the results of the study, it is known that the estimated amount of carbon stocks of 5,704.11 tons / ha is categorized as high.
Variations in Alginate Concentration as a Material for Immobilizing Thermophilic Bacteria on the Characteristics of Beads Summaiati, Titi; Irdawati, Irdawati
Jurnal Serambi Biologi Vol. 9 No. 2 (2024): Jurnal Serambi Biologi
Publisher : Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/srmb.v9i2.346

Abstract

Immobilization is a technique for physically confining or placing microbial cells in a certain space, where the cells still maintain catalytic activity. The cell immobilization technique aims to facilitate product purification, increase productivity, make it easier to control cell stability and microbial cells can be used repeatedly. One carrier that is often used as a matrix to trap microorganism cells is alginate. Alginate is a type of polysaccharide obtained through extraction from brown algae. The immobilization technique with aginate cells was chosen because of its non-toxic nature, simple procedure for immobilization and cheap price for industrial applications. Alginate concentration affects the physical and chemical properties of the beads produced, such as size, shape and color of the beads. This study aims to compare variations in alginate concentration as a material for immobilizing thermophilic bacteria on the characteristics of the beads. This research is descriptive research. Beads are made with varying concentrations, namely 2%, 3%, 4%, 5% and 6% alginate. Data in the form of beads characteristics which include size, shape and color of beads. Based on research, the results obtained are that the higher the alginate concentration, the larger the diameter of the beads, the color of the beads will be more intense and the shape of the beads will tend to be round, and the beads will be sturdier, and vice versa.
Produksi Energi Listrik Bakteri Termofilik MS 12 sebagai Microbial Fuel Cell pada Substrat TMM (Termofilik Minimum Media) Aryeni Fatwah, Monika; Irdawati, Irdawati; Andrian, Richard
Jurnal Serambi Biologi Vol. 9 No. 2 (2024): Jurnal Serambi Biologi
Publisher : Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/srmb.v9i2.347

Abstract

Energi listrik merupakan aspek penting dalam kehidupan sehari-hari, namun sumber daya untuk produksi energi ini semakin terbatas. Keterbatasan ini mendorong perlunya perhatian serius terhadap penggunaan energi. Pentingnya aspek ramah lingkungan dalam pembangkitan energi listrik menjadi sorotan utama, salah satunya produksi energi listrik menggunakan mikroorganisme sebagai biokatalisator atau biasa dikenal dengan Microbial Fuel Cell (MFC). Tujuan penelitian untuk mengetahui produksi energi listrik dengan memanfaatkan bakteri termofilik sebagai MFC pada substrat TMM. Penelitian dilakukan di Laboratorium Mikrobiologi, Departemen Biologi, FMIPA, UNP. Pada penelitian ini digunakan isolat bakteri termofilik MS 12 yang berasal dari sumber mata air panas Mudiak Sapan. Data dianalisis secara deskriptif dengan menampilkan grafik dan gambar. Hasil penelitian memperlihatkan produksi tegangan listrik isolat MS 12 mencapai nilai tertinggi yaitu 640.5 mV pada waktu 20 jam inkubasi.
Growth Pattern of Thermophilic Bacterial Isolate SSA-16 from Sapan Sungai Aro Hot Springs Suherman, Donny; Irdawati, Irdawati
Jurnal Serambi Biologi Vol. 9 No. 2 (2024): Jurnal Serambi Biologi
Publisher : Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/srmb.v9i2.350

Abstract

Thermophilic bacteria are a group of microorganisms that grow optimally at temperatures of more than 45°C and the general growth range is between 45°C to 80°C. To determine the growth pattern of thermophilic bacteria originating from the Sapan Sungai Aro hot springs, isolate SSA-16 was carried out by measuring the level of bacterial turbidity. The method used in this research is a descriptive approach using two replications (duplo). The isolate that is the focus is SSA-16. Bacteria were incubated for 24 hours at 2 hour intervals at a temperature of 50ºC and their growth was measured using a UV-Vis Spectrophotometer with a wavelength of 600 nm. The OD value is measured on a scale of 0 to 2. From the results of the tests that have been carried out, you can see the results of the Optical Density (OD) test to see the growth pattern of SSA-16 bacterial isolates using a UV-Vis spectrophotometer (600 nm) through several phases. The first phase is the lag phase which occurs from the 2nd to the 6th hour, the second is the exponential phase which occurs from the 8th to the 14th hour and reaches the highest average of 0.706 and in the next hour the bacterial growth is at the Stationary or bacterial growth can be declared stagnant.
Pengaruh Pupuk Organic Cair (POC) dari Limbah Perut Ikan Tuna Mata Besar (Thunnus obesus) Terhadap Pertumbuhan Tanaman Cabai Rawit (Capsicum frutescens L.) Ovalia Pradila, Andini; Razak, Abdul
Jurnal Serambi Biologi Vol. 9 No. 2 (2024): Jurnal Serambi Biologi
Publisher : Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/srmb.v9i2.352

Abstract

Cabai Rawit merupakan sayuran yang umum digunakan sebagai bahan konsumsi sehari-hari. Produktifitasnya dapat ditingkatkan melalui pemberian pupuk seperti pupuk organik cair. Bahan pembuatan pupuk organik dapat berasal dari bahan alami seperti limbah jeroan ikan, karena diyakini memiliki kandungan unsur hara yang bermanfaat bagi pertumbuhan tanaman. Penggunaan teknologi nano dalam pembuatan pupuk organik cair berfungsi untuk merubah ukuran partikel zat menjadi lebih kecil sehingga nutrisi lebih mudah terurai dan diserap oleh akar tanaman. Metode yang digunakan adalah rancangan acak lengkap (RAL) dengan 5 perlakuan dan 5 ulangan, terdiri dari : P0 (100 ml air/polybag), P1 (25 ml POC limbah ikan + 75 ml air/polybag), P2 (50 ml POC limbah ikan + 50 ml air/polybag), P3 (75 ml POC limbah ikan + 25 ml air/polybag), dan P4 (100 ml POC limbah ikan/polybag). Data yang diperoleh dianalisis dengan sidik ragam ANOVA (Analysis of Variance) menggunakan aplikasi SPSS (Statistical package for the Social Sciences) dan uji lanjut dengan Duncan’s New Multiple Range Test (DNMRT) pada taraf 5%. Hasil penelitian menunjukkan bahwa pemberian pupuk organik cair berpengaruh terhadap semua parameter yang diamati. Konsentrasi optimal untuk menghasilkan tinggi tanaman dan berat buah Cabai Rawit tertinggi yaitu pada P4 (100 ml POC limbah ikan/polybag), serta konsentrasi optimal untuk mengahasilkan luas daun tertinggi yaitu pada P3 (75 ml POC limbah ikan + 25 ml air/polybag).
Pengaruh Pupuk Organik Cair (POC) Teknologi Nano Dari Limbah Perut Ikan Tuna Mata Besar (Thunnus obesus) Terhadap Pertumbuhan Tanaman Cabai Merah (Capsicum annum L.) Putri, Rika; Razak, Abdul
Jurnal Serambi Biologi Vol. 9 No. 2 (2024): Jurnal Serambi Biologi
Publisher : Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/srmb.v9i2.353

Abstract

Cabai merah adalah salah satu komoditas holtikultura yang sangat penting. Cabai merah memiliki kandungan gizi dan berbagai vitamin. Buah cabai merah menghasilkan rasa pedas karena adanya kandungan Capsaicin pada cabai. Kebutuhan akan cabai merah meningkat karena bertambahnya jumlah penduduk. Pada saat sekarang ini, unsur hara yang dipakai oleh petani dipenuhi dengan penggunaan pupuk anorganik yang dapat menyebabkan kerusakan pada tanah sehingga kulitas tanah makin menurun. Dalam mengurangi pemakaian pupuk anorganik, digunakan bahan organik dalam pembuatan pupuk baik dalam bentuk padat maupun cair. Metode yang digunakan dalam penelitian adalah rancangan acak lengkap (RAL) dengan 5 perlakuan dan 5 pengulangan yang terdiri dari: P0 (100 ml air/ tanpa POC), P1 (25 ml POC + 75 ml air), P2 ( 50 ml POC + 50 ml air), P3 (73 ml POC + 25 ml air), P4 (100 ml POC). Data yang diperoleh dianalisis dengan sidik ragam ANOVA dengan menggunakan aplikasi SPSS 23. Jika terdapat perbedaan nyata maka dilanjutkan dengan uji Duncan New Multiple Range Test (DNMRT) pada taraf 5%. Hasil penelitian menunjukkan bhwa pemberian pupuk organik cair teknologi nano dari limbah ikan Tuna Mata Besar berpengaruh terhadap semua parameter pengamatan. Konsentrasi optimal dari semua parameter pengamatan adalah 100 ml POC/polibag.
Pengaruh Variasi Konsentrasi Pemberian Pelet Organik Terhadap Pertumbuhan Ikan Nila (Oreochromis niloticus) Zahari. P, Engla Mutiara; Razak, Abdul
Jurnal Serambi Biologi Vol. 9 No. 2 (2024): Jurnal Serambi Biologi
Publisher : Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/srmb.v9i2.355

Abstract

Budidaya ikan air tawar sekarang telah menjadi sebuah kegiatan agribisnis yang tak terpisahkan dengan industri pakan ikan (Yulianda dkk, 2012). Permasalahan yang ditimbulkan dari penggunaan pakan ikan anorganik yaitu dapat menginduksi kanker. Ini disebabkan pakan anorganik terdeteksi mengandung mikotoksin yang menyebabkan gangguan pertumbuhan serta disfungsi kekebalan tubuh. Masalah lain dalam pembudidayaan ikan adalah relatif mahalnya biaya penyediaan pakan yang bisa mencapai 60-70% dari biaya produksi (Rihi, 2019). Tujuan artikel ini adalah menganalisis pengaruh pemberian pelet organik dengan tingkat dosis berbeda terhadap pertumbuhan Ikan Nila Metode yang digunakan dalam penelitian ini adalah Rancangan Acak Lengkap (RAL) dengan 5 perlakuan dan 5 pengulangan, terdiri dari P0 (pelet anorganik varietas HI PRO-VITE 781), P1 (dosis pelet organik 4%), P2 (dosis pelet organik 5%), P3 (dosis pelet organik 6%), P4 (dosis pelet organik 7%). Data yang diperoleh dianalisis dengan sidik ragam ANOVA (Analysis of Varience) menggunakan aplikasi SPSS. Jika terdapat perbedaan nyata dilanjutkan dengan uji Duncan’s New Multiple Range Test (DMRT) pada taraf 5%. Dari data dapat ditarik kesimpulan bahwa pemberian pelet organik memberikan hasil berbeda nyata pada pertumbuhan Ikan Nila. Pertumbuhan Ikan Nila terbaik terdapat pada P4 dengan dosis 7%.

Page 18 of 19 | Total Record : 187

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