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SIMBIOSIS

simbiosis
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Published by Universitas Udayana

ISSN : 23377224 EISSN : 26567784 DOI : 10.24843/simbiosis

Core Subject : Agriculture,

Agriculture, Biological Sciences & Forestry

Arjuna Subject : -

Articles 6 Documents

Search results for , issue "Vol 9 No 1 (2021)" : 6 Documents clear

WATER QUALITY ANALYSIS AT THREE SPRINGS IN SUKAWATI SUB-DISTRICT OF GIANYAR DISTRICT, BALI Ni Gusti Made Yuliari; Ni Luh Watiniasih; Alfi Hermawati Waskitasari
SIMBIOSIS Vol 9 No 1 (2021)
Publisher : Jurusan Biologi Universitas Udayana

Utilization of springs as water resources for their daily needs by the people of Sukawati Sub-Distric of Gianyar Regency, Bali is still quite high Human activities, such as increasing domestic, industrial and agricultural activities, have an effect on decreasing water quality. This research was conducted ini December 2019 to January 2020 at Pancoran Kutri springs, Beji Dalem Agung Kemenuh springs and Taman Beji Cengcengan springs. This research aimed to determine water quality based on Bali Governor's Regulation No.16 of 2016 concerning Environmental Quality Standards and Standard Criteria for Enviromental Damage Based on Class (Class I) and Minister of Health Republic of Indonesia Regulation No.492/ Menkes/Per/IV/2010 concerning Prerequisites for Drinking Water Quality. The parameters analyzed were the physical parameters (temperature and TDS), the chemical parameters (pH, DO, BOD, nitrate, phosphate, cadmium (Cd) and lead (Pb)) and the biological parameters (fecal coliform bacteria). The results of the research conducted showed that the water quality in the three springs in the study location still met the water quality standards. However, DO parameters at Pancoran Kutri springs, BOD parameters at Taman Beji Cengcengan springs and phosphate in the three springs at the research location are based on regulations, as well as fecal coliform bacteria parameters in the three springs at the research location based on the Regulation of the Minister of Health of the Republic of Indonesia No. 492/Menkes/Per/IV/2010 have exceeded the quality standard threshold.

STRUCTURE AND COMPOSITION WEED OF RICE-FIELD(Oryza sativa L.) IN CEMPAGA VILLAGE BANGLI DISTRICT, BANGLI Ida Ayu Gede Sutha Windari Subagia Putri; Martin Joni; I Ketut Sundra
SIMBIOSIS Vol 9 No 1 (2021)
Publisher : Jurusan Biologi Universitas Udayana

INTISARI Keberadaan gulma pada tanaman padi akan menyebabkan penurunan produksi apabila gulma tidak dikendalikan secara efektif, karena dapat mempengaruhi pertumbuhan dan menurunkan produksi tanaman pangan. Penelitian ini bertujuan untuk mengetahui keanekaragam jenis gulma yang tumbuh pada tanaman padi (Oryza sativa L.) di Desa Cempaga, Kecamatan Bangli, Kabupaten Bangli, mengetahui jenis gulma yang tumbuh pada tanaman padi (Oryza sativa L.), dan jenis gulma apakah yang dominan pada tanaman padi (Oryza sativa L.). Penelitian ini dilaksanakan di Desa Cempaga Kecamatan Bangli Kabupaten Bangli pada bulan Maret-Mei 2020. Pengumpulan data dilakukan dengan analisis vegetasi menggunakan metode kuadrat dengan cara random menggunakan lotre atau undi dimana pengambilan sampel dilakukan sebanyak tiga kali yaitu pada minggu ke-8, ke-10, dan ke-12 dengan interval waktu pengambilan yaitu sekali dalam 2 minggu sehingga jumlah sampel yang diambil setiap 2 minggu yaitu 15 plot dengan ukuran 1x1m, dan data yang diambil yaitu jenis gulma yang terdapat didalam plot. Hasil pengamatan keberadaan jenis gulma menunjukkan bahwa jenis-jenis gulma yang tumbuh di lokasi penelitian cukup bervariasi, terdapat 781 individu, 12 jenis dan 8 suku, dimana gulma yang paling banyak muncul di plot yaitu tumbuhan Pusut-pusut muncul di 23 plot dan memiliki dominansi relatif yaitu sebesar 49,31%, sedangkan gulma yang paling sedikit muncul yaitu Paku Rawa hanya muncul di satu plot dengan memiliki nilai dominansi relatif yaitu 0,00%. Dimana artinya tumbuhan yang paling berpotensi mengganggu tanaman pokok yaitu tumbuhan Pusut-pusut dengan pola penyebaran yang mengelompok. Nilai INP tertinggi terdapat pada jenis gulma Pusut-pusut dengan nilai sebesar 103.45%. Kata Kunci : Desa Cempaga, Gulma, Padi Sawah

ELIMINATION OF Escherichia coli O157:H7 AND Escherichia coli O157 ON MEAT BY ULTRAVIOLET IRRADIATION Revi Juniar Nutrihidayah; Retno Kawuri; Inna Narayani
SIMBIOSIS Vol 9 No 1 (2021)
Publisher : Jurusan Biologi Universitas Udayana

Infection is a major problem mortality and morbidity in the world, a lot of an infection in the digestive tract is causes bacteria. The Escherichia coli O157 and Escherichia coli O157: H7 strains are bacteria that cause bloody diarrhea to death. Ultraviolet light has the potential to eliminate bacteria. The purpose is to know decontamination of E. coli O157 and E. coli O157: H7 on meat after ultraviolet exposure. The method is a factorial RBD with two factors (distance and time) with variations in distances (5, 10, 15, and 20 cm) and times (5, 10, 15, 20 dan 25 minutes). All treatments were repeated twice and obtained 160 samples. The quantitative data obtained were using univariant analysis followed by the Least Significant Difference with a significant level of 5%. The irradiation for E. coli O157 on meat with 5 cm for 25 minutes showed a significant reduction (88,62%), while the farthest distance 20 cm for 25 minutes decreased (73,42%). The nearest irradiation E. coli O157: H7 on meat 5 cm for 25 minutes show decrease (86,78%), while the farthest distance was 20 cm for 25 minutes (75,16%), there was an increase colonies in several treatment variations but overall decreased. In conclusion there was significant decrease number of bacterial colonies in meat given E. coli O157 culture, while there was a fluctuation decrease number of colonies in meats given E. coli O157: H7 culture.

THE MACROALGAE COMMUNITY STRUCTURE IN GEGER BEACH AND MENGENING BEACH BADUNG REGENCY Ni Putu Sintha Maharani; Ni Luh Watiniasih; Ayu Putu Wiweka Krisna Dewi
SIMBIOSIS Vol 9 No 1 (2021)
Publisher : Jurusan Biologi Universitas Udayana

Makroalga dikenal sebagai rumput laut dan torgolong ke dalam tumbuhan tingkat rendah dimana organ–organ yang berupa akar, batang, dan daun relatif sulit untuk dibedakan. Penelitian ini bertujuan untuk mengetahui perbedaan karakteristik habitat, jumlah jenis, biomassa serta struktur komunitas makroalga di Pantai Geger dan Pantai Mengening. Penelitian ini menggunakan metode survei dengan cara pengambilan data dengan menggunakan metode transek kuadran. Hasil penelitian menunjukkan bahwa Pantai Geger memiliki karakteristik substrat berpasir sedangkan Pantai Mengening memiliki substrat yang terdiri dari batuan karang. Kondisi kualitas perairan di kedua lokasi masih sesuai untuk pertumbuhan makroalga. Dari hasil penelitian ditemukan 8 jenis makroalga di Pantai Geger dan 10 jenis makroalga di Pantai Mengening. Nilai biomassa makroalga tertinggi di Pantai Geger terdapat pada jenis Gracilaria hayi dengan bobot berkisar antara 72,08-73,18 g/m2 sedangkan nilai biomassa makroalga tertinggi di Pantai Mengening terdapat pada jenis Valonia aegagropila yang berkisar antara 181,31-190,40 g/m2. Berdasarkan hasil nilai indeks keanekaragaman makroalga di Pantai Geger sebesar 1,93-1,99 sedangkan di Pantai Mengening sebesar 1,79-2,07 sehingga termasuk kedalam ketegori sedang. Nilai indeks dominansi makroalga di Pantai Geger sebesar 0,15-0,17 sedangkan di Pantai Mengening sebesar 0,17-0,25, sehingga nilai indeks dominansi di kedua pantai tersebut termasuk dalam kategori rendah. Nilai indeks kemerataan di Pantai Geger sebesar 0,93-0,96 sedangkan di Pantai Mengening sebesar 0,78-0,90, sehingga nilai indeks kemerataan di kedua pantai tersebut termasuk kedalam kategori kondisi stabil.

COMMUNITY STRUCTURE OF SEAGRASS BEDS IN PANDAWA BEACH AQUATIC, BALI Kadek Bayu Prabha Mahesswara; Ni Luh Watiniasih; I Wayan Darya Kartika
SIMBIOSIS Vol 9 No 1 (2021)
Publisher : Jurusan Biologi Universitas Udayana

This research aimed to determine the types and structure of seagrass community based on species density, species relative density, diversity index, uniformity index, and dominance index of the seagrass. This research was conducted along Pandawa Beach, Kutuh Village, South Kuta District, Badung Regency, Bali from November to December 2019. Data of seagrass were collected from 3 line transects, 3 kuadran transects from each transect, repeated 3 times. Water quality data were collected 3 times within 4 weeks. Eight species of seagrass were identified, namely: Thalassia hemprichii, Cymodocea serrulata, Halodule pinifolia, Halodule uninervis, Halophila ovalis, Halophila decipiens, Syringodium isoetifolium, and Thalassodendron ciliatum. The highest species density found at station I that was Thalassodendron ciliatum, as well as for its relative density, and the lowest was Thalassia hemprichii. At station II and III, the highest species density was found on Cymodocea serrulata and the lowest was on Halophila ovalis. The study found that the species density of seagrasses at Pandawa Beach was categorized as high density, which dominated by Thalassodendron ciliatum at station I and by Cymodocea serrulata at station II and III. Diversity index of seagrass species at station I and II was categorized as medium species diversity and low species diversity for the station III. Dominance index of seagrass species at the three station was categorized as high dominance. Similarity index of seagrass species was categorized as medium or unstable community for the station I and II, and low similarity for the station III.

USE OF MEDIA TYPES AND FERTILIZER TREATMENTS FOR THE GROWTH OF DENDROBIUM ORCHIDS Ida Ayu Meva Lianawati; Ni Putu Adriani Astiti; Ni Luh Suriani
SIMBIOSIS Vol 9 No 1 (2021)
Publisher : Jurusan Biologi Universitas Udayana

ABSTACT Reseach on dendrobium orchids was planted in the media of wood charcoal and coconut fibers and it is needed with Gandasil B fertilizer wood charcoal and coconut fiber media and is needed with Gandasil B and Multitonik fertilizer. This study aims to determine the effect of media and fertilizer on orchid growth and to determine pests and diseases in Dendrobium orchid plants. This reseach was conducted in May until July 2019 in the Plant Physiology Laboratory Biologi Prodi Studi Biologi Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Udayana. Qualitative and quantitative data are used that combine the Gandasil B fertilizer and fibers and wood charcoal media Fertilizer Gandasil B fertilizer with concetration G0 (0 g L-1), G2 (20 g L-1), G3 (30 g L-1), G4 (40 g L-1), G5 (50 g L-1). Fertilizer Multitonik M0 (0 g L-1), M1 (1,1 g L-1), M2 (1,2 g L-1), M3 (1,3 g L-1), M4 (1,4 g L-1), M5 (1,5 g L-1). Each fertilizer concentration was repeated 6 times. The results showed the best orchid growth was found in the use of Multitonik fertilizer and the best orchid growth was found in the use of Multitonik number of leavers and root growth were found in the use of coconut fibers media

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