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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Ilmiah Mahasiswa Agrokomplek
Niechi Valentino
University of Mataram
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology Physics Social Sciences Other

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Preliminary Study of Mangrove Eco-Structures and Natural Regeneration at Gili Lawang, East Lombok, West Nusa Tenggara) Niechi Valentino; Andrie Ridzki Prasetyo; Muhammad Anwar Hadi
Jurnal Penelitian Pendidikan IPA Vol 9 No 1 (2023): January
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i1.4451

Abstract

Gili Lawang mangroves as a unique ecosystem, unstable, dynamic and complex. The purpose of this study is to determine the eco-structure and natural regeneration of the Gili Lawang mangroves as an initial study in sustainable mangrove forest management. This study used a systematic sampling method with random start, at 6 stations with a total of 60 plots. Seven types of mangroves were obtained, namely A. marina, B. cylindrica, B. gymnorrhiza, R. apiculata, R. mucronata, R. stylosa, and S. alba at the study site. The highest IVI was R. mucronata with a value of 79.34% (seedlings), B. gymnorrhiza with an IVI of 77% (saplings) and tree stage (96.2%). Canopy stratification is type C, D and E. The concentration of horizontal structures is in class 1 (10-16 cm). At the seedling growth stage H' was classified as moderate (1.33), E' was moderate (0.69), and R1 was low (1.13). At the stake level H' classified as Moderate (1.31), E' is moderate (0.67) and R1 is low (1.04) and at the tree level H' is classified as moderate (1.59), E' is high (0.82), R1 is low (0.95). The distribution of mangrove species in Gili Lawang was normally distributed with a distribution pattern of plant species generally clustered, except for S. alba at the sapling growth stage which were scattered randomly. The regeneration status of mangrove species in Gili Lawang is good in speciesA. marina, B. gymnorrhiza, R. apiculata,and R. mucronata, and sufficient/moderate on B. cylindrica, R. stylosa and S. alba.
Farmers' Perceptions of the Competence of Agricultural Instructors in Karang Sidemen Village Arifuddin Sahidu; Hayati Hayati; Muktasam Muktasam; Niechi Valentino; Muhammad Anwar Hadi
Jurnal Penelitian Pendidikan IPA Vol 9 No 12 (2023): December
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i12.6137

Abstract

Extension workers have a big role in the success of farming activities in an area and can indirectly have a big influence on the welfare of farmers in particular and the success of agricultural activities in general. The aim of carrying out this research is to describe the relationship between farmers' perceptions of the competency of agricultural instructors and at the same time determine the variables that influence farmers' perceptions of the competency of agricultural instructors in terms of farmer characteristics, farming business characteristics and the quality of extension. This research uses an exploratory descriptive approach with a survey method using interviews and the help of questionnaires. The sample was determined by quota sampling, namely 4 people in each agricultural farmer group consisting of the chairman and active members. Data are presented on a Likert scale, and relationship analysis uses the Rank Spearman statistical test. The results of the analysis of respondents' perceptions of instructor competence in terms of personality (2.87), andragogic (2.60), professional (2.63), and social (2.64) variables were at medium criteria (2-3). The relationship between each variable of personal characteristics, farming characteristics, and quality of extension with respondents' perceptions of PPL competency shows a real relationship with the variables of farming experience, land area, market accessibility, land ownership status, extension materials, extension methods, and extension media, where The extension method and extension material variables have the highest correlation coefficient among the others, namely (0.642) and (0.513) which are classified as a strong relationship level (0.51-0.75) at a confidence level of 0.01%.
Asosiasi Antarjenis Pohon Dominan sebagai Indikator Stabilitas Komunitas Hutan Adat Montong Gedeng, Lombok Utara Niechi Valentino; Nurul Chaerani; Andrie Ridzki Prasetyo; M. Adhi Putra Firmansyah
Jurnal Ilmiah Mahasiswa Agrokomplek Vol. 5 No. 1 (2026): Jurnal Ilmiah Mahasiswa Agrokomplek
Publisher : Fakultas Pertanian Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/5g85gk03

Abstract

Hutan adat merupakan salah satu bentuk pengelolaan sumber daya berbasis kearifan lokal yang berperan penting dalam menjaga keanekaragaman hayati dan stabilitas ekosistem. Penelitian ini bertujuan untuk mengidentifikasi jenis pohon dominan, menganalisis pola asosiasi antarjenis dominan, serta mengevaluasi implikasinya terhadap stabilitas komunitas vegetasi di Hutan Adat Montong Gedeng, Desa Loloan, Kecamatan Bayan, Kabupaten Lombok Utara. Penelitian dilaksanakan pada kawasan seluas 84 ha menggunakan metode systematic sampling with random start dengan intensitas sampling 1%, sehingga diperoleh 21 petak ukur. Data vegetasi dianalisis menggunakan Indeks Nilai Penting (INP), sedangkan asosiasi antarjenis dianalisis menggunakan tabel kontingensi 2×2 dan uji Chi-square. Hasil penelitian menunjukkan bahwa ditemukan 16 jenis pohon dari 13 famili dengan lima jenis dominan utama, yaitu Schleichera oleosa (137,4%), Schoutenia ovata (60,1%), Tamarindus indica (31,5%), Ziziphus mauritiana (25,1%), dan Streblus asper (10,1%). Analisis asosiasi menunjukkan adanya lima pasangan jenis dengan asosiasi positif dan signifikan, yaitu Schleichera oleosa–Schoutenia ovata, Schleichera oleosa–Tamarindus indica, Schleichera oleosa–Ziziphus mauritiana, Schoutenia ovata–Ziziphus mauritiana, serta Tamarindus indica–Ziziphus mauritiana. Dominansi Schleichera oleosa yang disertai asosiasi positif dengan beberapa spesies utama mengindikasikan terbentuknya kelompok inti penyusun komunitas yang berkontribusi terhadap stabilitas vegetasi. Komposisi spesies dominan yang didominasi oleh jenis-jenis toleran kekeringan menunjukkan bahwa Hutan Adat Montong Gedeng masih mempertahankan karakteristik khas hutan musim tropis dataran rendah. Hasil penelitian menegaskan pentingnya pengelolaan berbasis kearifan lokal dalam mempertahankan struktur komunitas, stabilitas ekosistem, dan fungsi konservasi hutan adat.
Struktur Vegetasi, Regenerasi Alami, dan Spesies Inti sebagai Indikator Fungsi Refugia Hutan Adat Montong Gedeng pada Lansekap Hutan Musim Dataran Rendah Niechi Valentino; Andrie Ridzki Prasetyo; Rato Silamon Firdaus; Nurul Chaerani
Jurnal Ilmiah Mahasiswa Agrokomplek Vol. 5 No. 1 (2026): Jurnal Ilmiah Mahasiswa Agrokomplek
Publisher : Fakultas Pertanian Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/rm4mpc45

Abstract

Hutan musim tropis dataran rendah merupakan salah satu ekosistem yang paling terancam akibat konversi lahan, fragmentasi habitat, dan perubahan penggunaan lahan yang menyebabkan penurunan biodiversitas serta degradasi fungsi ekologis. Dalam konteks konservasi, habitat yang mampu mempertahankan spesies dan proses ekologis penting di tengah tekanan lingkungan berpotensi berfungsi sebagai refugia. Penelitian ini bertujuan mengevaluasi potensi fungsi refugia Hutan Adat Montong Gedeng, Desa Loloan, Kecamatan Bayan, Kabupaten Lombok Utara, berdasarkan struktur vegetasi, regenerasi alami, dan keberadaan spesies inti penyusun hutan musim tropis dataran rendah. Penelitian dilakukan pada kawasan seluas 84 ha menggunakan metode systematic sampling with random start dengan intensitas sampling 1% sehingga diperoleh 21 petak ukur. Analisis vegetasi meliputi Indeks Nilai Penting (INP), indeks keanekaragaman Shannon–Wiener (H'), indeks kemerataan (E'), indeks kekayaan jenis Margalef (R'), analisis regenerasi alami, dan identifikasi spesies inti. Hasil penelitian menunjukkan bahwa komunitas vegetasi memiliki keanekaragaman sedang (H' = 1,59–1,93), kemerataan relatif tinggi (E' = 0,66–0,84), dan kekayaan jenis sedang (R' = 1,35–2,34), serta ditemukan vegetasi pada seluruh tingkat pertumbuhan. Lima spesies menunjukkan regenerasi kontinu, yaitu Schleichera oleosa, Schoutenia ovata, Streblus asper, Tamarindus indica, dan Vatica bantamensis. Analisis dominansi dan regenerasi mengidentifikasi lima spesies inti yang mendominasi komunitas vegetasi. Temuan ini menunjukkan bahwa Hutan Adat Montong Gedeng memiliki karakteristik ekologis yang mendukung potensinya sebagai refugia bagi vegetasi hutan musim tropis dataran rendah di Pulau Lombok.
Co-Authors Andrie Ridzki Prasetyo Andrie Ridzki Prasetyo Arifuddin Sahidu Hayati Hayati M. Adhi Putra Firmansyah Muhammad Anwar Hadi Muktasam Nurul Chaerani Rato Silamon Firdaus