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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Gorontalo Journal of Forestry Research MAKILA: Jurnal Penelitian Kehutanan Jurnal INSAN TANI Journal of International Multidisciplinary Research Svāsthya: Trends in General Medicine and Public Health
Daud Sandalayuk
Universitas Gorontalo, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology Physics Public Health Social Sciences Other

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ANALISIS PERTUMBUHAN GMELINA (Gmelina alborea.Roxb) DAN MAHONI (Swietenia magrophylla.King ) di GORONTALO Sandalayuk, Daud
Gorontalo Journal of Forestry Research VOLUME 1 NOMOR 1 TAHUN 2018 GORONTALO JOURNAL OF FORESTRY RESEARCH
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (460.232 KB) | DOI: 10.32662/gjfr.v1i1.70

Abstract

To know the growth analysis of Gmelina ( Gmelina alborea.Roxb ) and Mahoni (Swietenia  magrophylla.King). It is necessary to look at the growth at a certain period in which a certain moment of growth will decrease so that the consideration in the maintenance can be done very evectively and consideration to harvest as needed in the processing of sawn timber or playwood. Mean Growth at age 10, diameter of gmelina 2,4 cm / tree / year, total volume 144,43 m3 / ha, MAI 14,44 m3 / atun, CAI 28,46 m3, Medium point of intersection of MAI and CAI occurred at age 15 years with total volume 251,80 m3 / ha. The growth of Mahogany at the age of 20 years after the measurement in the field with the width of I ha of 510 trees with an increase of diameter 1.38 cm / year, the number of Volume 174.35 m³ / ha and MAI 8.72 and CAI 12.58. At the time when MAI 9.37 and CAI 9.27 were at one point then it was allowed to harvest with age 30 years with a total voLume of 281.03 m3 / ha. This growth analysis can be used to analyze a tree type and help in analyzing an industrial plant where we want is a shorter age for harvesting so that time and cost are not much wasted
PERSEPSI MASYARAKAT TENTANG PENGAMBILAN HASIL HUTAN KAYU PADA KAWASAN HUTAN PRODUKSI GORONTALO Daud - Sandalayuk; Epen Wonda
Gorontalo Journal of Forestry Research VOLUME 2 NOMOR 1 TAHUN 2019 GORONTALO JOURNAL OF FORESTRY RESEARCH
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gjfr.v2i1.505

Abstract

Penyebab kerusakan hutan tersebut terutama terjadi akibat kegiatan Illegal logging yang meliputi kegiatan penebangan liar, kegiatan konservasi pengelolaan, kesalahan pengelolaan Daerah Aliran Sungai (DAS), kebakaran hutan, perambahan kawasan, penebangan melebihi jatah tebang. Praktek penguasaan hutan oleh pemegang Hak Penguasaan Hutan (HPH) dan penebangan liar telah merusak jutaan hektar termasuk telah memusnahkan banyak spesis-spesis tanaman dan hewan pada kawasan hutan. Penelitian dilakukandi Desa Bontula,  Masyarakat sudah memiliki pengetahuan yang cukup baik tentang dampak pengambilan hasil hutan secara ilegal terhadap kawasan hutan, responden  menjawab tahu  sebanyak 19 Orang atau  47,50%. Diikuti,  Kurang Tahu yaitu sebanyak 11 orang  sebesar 27,50%. sangat tahu  6 orang sebesar 15,00%.  Sisanya yaitu  4 orang sebesar 10,00% menjawab tidak tahu. Dinas Kehutanan Kabupaten Gorontalo selalu melakukan kegiatan pengamanan hutan produksi di Desa Bontula Kecamatan Asparaga.  Responden menjawab Selalu sebanyak 25 orang atau  62,50%; dan diikuti responden  menjawab kadang-kadang sebanyak 10 orang atau 25,00%.  sisanya  5 orang atau  12,50% menjawab jarang sekali. Dinas Kehutanan  Kabupaten Gorontalo selalu melibatkan masyarakat. Responden menjawab Selalu  sebanyak 24 orang atau 60,00%; diikuti menjawab kadang-kadang sebanyak 8 orang atau  20,00%. Responden  menjawab jarang sekali  7 orang atau  17,50%;  sisanya  sebanyak 1 orang atau sebesar 2,50% menjawab tidak pernah. Dinas Kehutanan Kabupaten Gorontalo selalu melakukan rajia terhadap pengambilan hasil hutan kayu  kawasan hutan produksi di Desa Bontula Kecamatan Asparaga Kabupaten Gorontalo.  Responden  menjawab selalu yaitu sebanyak 28 orang atau  70,00%;  responden yang menjawab kadang-kadang  sebanyak 6 orang 15,00%.  menjawab jarang sekali  4 orang atau 10,00%. Sedangkan sisanya sebanyak 2 orang  sebesar 5,00% menjawab tidak pernah.
Thinning on the Growth of Red Jabon Trees (Anthocephallus Macrophyllus) in the Industrial Plantation Forest Area Daud Sandalayuk; Masrukhin; Murni Djabar; Alexander Ruruh; Ernikawati
Jurnal Penelitian Pendidikan IPA Vol 9 No 8 (2023): August
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i8.4106

Abstract

This study aims to observe the growth of red jabon (Anthocephalus macrophyllus) plants at various thinning intensities. Red jabon is a native Indonesian plant species that have the potential to develop forest plantations and reforestation ex-mining land. The research measured stem diameter and plant height at each thinning intensity. The study results are expected to provide information on the potential of red jabon cultivation and become a recommendation for red jabon wood farmers to improve the quality of company and farmer income. This research is expected to contribute to the development of thinning activities in improving the quality of red jabon tree stands, as well as providing a better understanding of this plant's cultivation and potential benefits. The thinning intensity applied 6 months the growth of Red Jabon trees in the Industrial Plantation Forest Area of PT. Global Citra Lestari showed a significant effect on stem diameter increment, 40% intensity treatment has a promising potential to enhance both stem diameter and height growth.
PENGELOLAAN HUTAN RAKYAT DI DESA BAKTI KECAMATAN PULUBALA KABUPATEN GORONTALO Djabar, Murni; Sandalayuk, Daud; Batti Palummi, Ratna
Jurnal INSAN TANI Vol. 2 No. 2 (2023): Jurnal INSAN TANI
Publisher : Jurnal INSAN TANI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.1234/jit.v2i2.31

Abstract

Pengelolaan hutan rakyat adalah pengelolaan hutan yang dilakukan di lahan hak milik rakyat, yang dapat memberikan hasil berupa kayu maupun non kayu.Tujuan penelitian ini untuk mengetahui gambaran potensi tegakan kayu rakyat berdasarkan Indeks Nilai Penting (INP) dan volume tegakan kayu rakyat. Penelitian ini dilaksanakan di Desa Bakti Kecamatan Pulubala Kabupaten Gorontalo pada April – Mei 2019. Metode yang digunakan adalah observasi lahan dengan membuat plot berpetak, wawancara dan dokumentasi, dengan sampel yang digunakan adalah lahan kelompok tani pemilik hutan rakyat. Penelitian dianalisis secara deskriptif dan diolah menggunakan rumus vegetasi dan volume pohon. Hasil dari penelitian ini diambil kesimpulan bahwa Potensi tegakan kayu rakyat berdasarkan Indeks Nilai Penting (INP) diperoleh jenis tegakan yang mendominasi lahan dengan INP tertinggi adalah jenis Jati dengan INP 223.71 dan jenis tegakan terendah adalah Jati putih dengan INP 90,56, dan potensi volume tegakan kayu rakyat yang tertinggi yaitu Jabon Merah dengan volume sebesar 25.481 m³ dan yang terendah adalah Mahoni dengan volume sebesar 7.326 m3.
ANALISIS INDEKS NILAI PENTING HUTAN MANGROVE BULALO GORONTALO UTARA Ernikawati, Ernikawati; Sandalayuk, Daud
MAKILA Vol 18 No 2 (2024): Makila: Jurnal Penelitian Kehutanan
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/makila.v18i2.13256

Abstract

Importance Value Index (INP) analysis can be used to determine which species dominates the observation plot. A species that can utilize its environment more than other species in an area is said to be dominant. The critical value index represents the many mangrove species contributing to the ecosystem. Certain mangrove species are essential and have an impact on mangrove communities. This research aims to analyze the Importance Value Index of the Bulalo mangrove. The method used in this research is using the Double Plot Path. The research results show that the Important Value Index (INP), relative cover (RCi), relative frequency (RFi), and relative density values (RDi) are generally classified as good. Based on the Importance Value Index (INP), mangrove vegetation has a reasonably high role in protecting the coastal environment in the coastal area of Bulalo Village, both in terms of tree saplings and seedlings.
Analisis Keanekaragaman Hayati: Peluang Agroforestri dalam Mengatasi Perubahan Iklim di Dulamayo, Gorontalo, Indonesia Hiola, Abdul Samad; Sandalayuk, Daud; Ruruh, Alexander
Journal of International Multidisciplinary Research Vol. 2 No. 12 (2024): Desember 2024
Publisher : PT. Banjarese Pacific Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62504/jimr1198

Abstract

The challenges posed by climate change and the decline of biodiversity to the sustainability of global agricultural systems are serious.Agroforestry has emerged as a strategy with the potential to enhance the resilience of agricultural systems while conserving biodiversity amidst the threats of climate change.This study aims to evaluate the potential of agroforestry to enhance biodiversity and the resilience of agricultural systems to climate change in Dulamayo, Gorontalo. The research methodology is based on vegetation analysis and the calculation of biodiversity indices, with data collection encompassing measurements of tree characteristics and species identification.The results indicate the presence of 17 tree species with a total of 154 individuals, where Candlenut (Aleurites molucana) and Sugar Palm (Arenga pinnata) dominate with proportions of 22.73% and 20.13%, respectively. The Shannon-Wiener diversity index yielded a moderate value (H' = 2.311) with a high evenness level (E = 0.816), indicating a high ecosystem stability.The findings suggest that the agroforestry system in Dulamayo plays a crucial role in supporting biodiversity and the resilience of ecosystems to climate change through its complex and diverse vegetation structure.
PENGARUH KETINGGIAN TEMPAT TERHADAP PRODUKTIFITAS AREN (Arenga pinnata) Dian Puspaningrum; Daud Sandalayuk; Mega SNH Wolinelo
Gorontalo Journal of Forestry Research VOLUME 2 NOMOR 2 TAHUN 2019 GORONTALO JOURNAL OF FORESTRY RESEARCH
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gjfr.v2i2.1095

Abstract

Tanaman Aren (Arenga pinnata) merupakan pohon sejuta manfaat, batang hingga daun dapat digunakan dan diolah menjadi bahan bernilai ekonomi. Desa Dulamayo merupakan salah satu desa penghasil nira aren yang cukup besar. Nira diolah menjadi gula semut oleh masyarakat sekitar dan dapat memenuhi pesanan hingga 1 Ton dalam waktu 1 minggu. Penelitian ini bertujuan mengetahui pengaruh ketinggian tempat terhadap produktifitas aren. Data diperoleh manggunakan metode Line transek dan membuat plot sampling di ketinggian 400 mdpl – 700 mdpl. Pada ketinggian 400 mdpl dan 700 mdpl diambil sampel tanah untuk dianalisis sifat fisiknya. Hasil penelitian menunjukkan bahwa kondisi fisik dan tempat tumbuh tanaman aren memberikan pengaruh yang cukup besar terhadap nira yang dihasilkan. Produksi nira yang paling tinggi adalah 1012 liter dalam waktu 2 (dua) bulan pada ketinggian 600 mdpl dan yang paling rendah 394.5 liter pada ketinggian 600 mdpl. Hasil analisis sifat fisiknya berupa berupa tekstur, warna, Bulk Density & Particle Density, ruang pori dan permeabilitas tanah menunjukkan kondisi tanah tempat tumbuh tanaman aren mendukung pertumbuhannya. Analisis uji pH tanah di ketinggian 700 mdpl menunjukkan tanah terlalu masam sehingga mempengaruhi pertumbuhan tanaman aren. Tanaman aren yang subur dapat menghasilkan nira yang banyak. 
Behavioral, environmental, and climatic factors associated with dengue hemorrhagic fever incidence in Limboto District, Gorontalo, Indonesia Sandalayuk, Marselia; Arda, Zul Adhayani; Hanapi, Sunarti; Hafid, Wahyuni; Pakaya, Ririn; Badu, Franning Deisi; Kanan, Maria; Sandalayuk, Daud; Baba, Julfa
Svāsthya: Trends in General Medicine and Public Health Vol. 2 No. 5 (2025): September 2025 (In Progress)
Publisher : PT. Mega Science Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70347/svsthya.v2i5.119

Abstract

Dengue hemorrhagic fever (DHF) remains endemic in Southeast Asia, with Indonesia reporting more than 131,000 cases and 1,135 deaths in 2022. In 2019, Gorontalo Province ranked fourth nationally in terms of incidence rate (101.53 per 100,000 population), with Gorontalo Regency accounting for 31.4% of the provincial cases in 2021. This study aimed to determine the factors associated with the incidence of dengue fever in the Limboto Health Center Working Area, Gorontalo Regency, in 2022. A cross-sectional research design was used. The research was conducted from April to July 2022 in the working area of the Limboto Health Center. The population and sample were people who lived in Limboto District, with 124 respondents. Simple random sampling was used. The independent variables were knowledge, attitude, action, water reservoir, air temperature, air humidity, and occupancy density. The dependent variable was the incidence of dengue hemorrhagic fever. The research instruments used were questionnaires, observation sheets, and hygrometers. The data were processed using univariate and bivariate analyses with SPSS at the 95% confidence level (p<0.05). Among the 124 participants, 33.1% (n=41) reported DHF infection during the study period. Chi-square analyses revealed no statistically significant associations between DHF incidence and knowledge (p=0.499, χ²=0.456), attitudes (p=0.526, χ²=0.401), preventive actions (p=1.000, χ²=0.000), water storage practices (p=0.763, χ²=0.091), ambient temperature (p=0.688, χ²=0.161), humidity (p=1.000, χ²=0.000), or household density (p=0.788, χ²=0.072). All p-values exceeded the 0.05 significance threshold, indicating insufficient evidence to reject the null hypotheses. No factors were significantly associated with DHF incidence in this cross-sectional analysis.
Co-Authors Arda, Zul Adhayani Baba, Julfa Batti Palummi, Ratna Djabar, Murni Epen Wonda ernikawati ernikawati ernikawati, ernikawati Franning Deisi Badu, Franning Deisi Hanapi, Sunarti Hiola, Abdul Samad Maria Kanan Masrukhin Mega SNH Wolinelo Murni Djabar Puspaningrum, Dian Ririn Pakaya Ruruh, Alexander Samsudin D. Sandalayuk, Marselia Wahyuni Hafid, Wahyuni