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I Ketut Sundra
Lab. Ekologi/Lingkungan, Prodi Biologi, FMIPA Universitas Udayana
Biochemistry, Genetics & Molecular Biology

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KUALITAS DAN STATUS MUTU AIR IRIGASI UNTUK PADI SAWAH DI SUBAK YEHEMBANG, KABUPATEN JEMBRANA, BALI I Ketut Sundra
SIMBIOSIS Simbiosis Volume 12 No. 1 2024
Publisher : Program Studi Biologi Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JSIMBIOSIS.2024.v12.i01.p12

Abstract

Research on the quality and status of irrigation water has been carried out for lowland rice in the Subak of Yehembang, Jembrana Regency, Bali. The sampling technique was carried out by Purposive Sampling. The analysis was carried out for physical, chemical and microbiological parameters. The level of feasibility of the results are matched with class 1 Water Quality Standards based on the Bali Governor Regulation No. 16 of 2016, while the status of water quality is determined by the Storet Method based on the Decree of the Minister of Environment No. 115 of 2003. The results showed that in the rainy and dry seasons there were 3 parameters namely DO, BOD5, and Coliform Bacteria pass grade 1 water quality standards. For the quality status of Subak yehembang irrigation water for 4 locations during the rainy and dry seasons all are classified as moderately polluted Keywords: subak, irrigation water, water quality, water quality statu.
STRUKTUR DAN KOMPOSISI VEGETASI GULMA PADA TANAMAN JAGUNG (Zea mays L.) DI DESA SEDANG, KABUPATEN BADUNG, BALI Ni Komang Nadya Maharani; Martin Joni; I Ketut Sundra
SIMBIOSIS Simbiosis Volume 13 No. 1 2025
Publisher : Program Studi Biologi Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JSIMBIOSIS.2025.v13.i05.

Abstract

Corn is the main food commodity that contains carbohydrates that the body needs and can improve the country's economy. In the production of corn, there are problems, namely the presence of weeds as pest organisms (OPT) which cause a decrease in quality and quantity. Based on this, the aim of this research is to determine the structure and composition of weeds associated with corn plants in Sedang Village, Badung Regency, Bali. The research was carried out using the quadratic method (Quadrat Sampling Technique) in the form of bush plots measuring 5m x 5m and herbaceous plots measuring 1m x 1m. Samples were taken at 4 planting time intervals and 5 repetitions. The ecological parameters used to analyze vegetation are the Importance Value Index (INP), Shannon-Wiener Species Diversity Index (H), Sorensen Similarity Index (IS), and Species Distribution Pattern. The research results showed that the composition of weed types consisted of 24 species and 11 families. The type that dominates the corn cultivation land in Medium Village is Cynodon dactylon weed (L.) Pers, with an INP value of 34.27% and Cyperus rotundus L. of 21.23%, where both types of weed are classified as vicious weeds that emit toxic allelopathic compounds. The Shannon-Wiener Species Diversity Index (H) is classified as a high weed, ranging from 0.70 to 3.74. The Similarity Index (IS) is in the low category, ranging from 19.23-26.79%. The distribution pattern of weed species ranges from 1.22 to 1.46, which indicates that it is clustered because the V/M value is > 1.
INTERPRETASI EKOWISATA OLEH PEMANDU WISATA (PRAMUWISATA) PADA DAYA TARIK EKOWISATA PENYU DI BALI Made Widiantari; Anak Agung Gde Raka Dalem; I Ketut Sundra
SIMBIOSIS Simbiosis Volume 13 No. 1 2025
Publisher : Program Studi Biologi Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JSIMBIOSIS.2025.v13.i11.

Abstract

Turtle-based ecotourism is a tourism activity that involve education and its quality is related to tour guides who provide interpretation. This research was important for the better sustainability of turtle-based ecotourism. This research was conducted from November 21, 2023 to January 17, 2024. This research aimed to determine types, facilities and quality of tourist guide interpretation. The methods utilized were observation, distributing questionnaires and running interviews. The number of guides interviewed were 15 and the tourists were 65. Results of this research showed that types of interpretation utilized by turtle-based ecotourism guides were guided tour, point duty, roving interpretation, presentation, demonstration, living history, interactive, and lecture or talk. The types of interpretation which were most widely used are guided tours and lectures or talks with the percentage of 100%. The interpretation facilities used by turtle ecotourism guides were printed media, self-guiding boards, interpretation boards, visitor centers, computers, videos, slideshows, cellphone numbers, and social media (Instagram and Facebook). The most widely used interpretation facilities were interpretation boards and visitor centers, with a percentage of 100%. The percentage of interpretation quality for Turtle Conservation and Education Center (TCEC), Saba Asri, Kurma Asih and Watu Klotok guides were 91.25%, 83.35%, 89.0% and 85.02% respectively. Tourist satisfaction with the interpretation from the TCEC tour guide and from Kurma Asih were classified as very good, while from the Saba Asri guide was classified as good. Keywords: Attraction, quality of interpretation, tools for interpretation, type of interpretation, tourists
Co-Authors Anak Agung Gde Raka Dalem Made Widiantari Martin Joni Ni Komang Nadya Maharani