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All Journal Jurnal Ilmu Pertanian Indonesia Jurnal Silvikultur Tropika (JST) Jurnal Sain Veteriner Public Health of Indonesia Indonesian Journal of Chemistry Communications in Science and Technology Biosaintifika: Journal of Biology & Biology Education Jurnal Pendidikan Sejarah dan Riset Sosial Humaniora (KAGANGA) Jurnal Ilmu dan Teknologi Kayu Tropis Jurnal Pembelajaran Pemberdayaan Masyarakat (JP2M) Jurnal Peduli Masyarakat Jurnal Kedokteran Universitas Palangka Raya Jurnal Sylva Lestari Jurnal Ilmu Kehutanan
Rita Kartika Sari
Departemen Hasil Hutan, Fakultas Kehutanan, Institut Pertanian Bogor Kampus IPB Darmaga Bogor, 16680
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Engineering Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences Veterinary Other

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Enhancing Pine Resin Productivity through Sulfuric Acid–Modified ETRAT Stimulants under Operational Conditions in Pinus merkusii Stands Gunawan Santosa; Juang Rata Matangaran; Ryan Darmawan; Darwis Alamsyah; Rita Kartika Sari
Jurnal Sylva Lestari Vol. 14 No. 2 (2026): May
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v14i2.1454

Abstract

Pine resin is an important non-timber forest product in Indonesia; however, the productivity of Pinus merkusii tapping remains relatively low and has not yet met industrial demand. This study evaluated the effect of a sulfuric acid–modified ETRAT stimulant on pine resin productivity under operational tapping conditions in Perum Perhutani forests in Central Java, Indonesia. Resin tapping was conducted on 160 trees distributed across four age classes (AC III–VI) using a randomized block design with four stimulant treatments: ETRAT, ETRAT + 5% H2SO4, ETRAT + 10% H2SO4, and a control without stimulant. Resin yield was monitored over 10 consecutive tapping periods, with intervals of 3 days. Resin productivity exhibited temporal variation across tapping periods, with generally lower yields during the initial tapping periods, increasing toward the intermediate periods, and declining slightly thereafter; however, differences among tapping periods were not statistically significant. Stimulant treatment significantly affected resin productivity. The highest productivity was achieved with ETRAT + 5% H2SO4 (11.29 g/quarre/day), representing an approximately 78% increase compared to the control (6.34 g/quarre/day). The addition of 10% H2SO4 did not further improve productivity, suggesting potential physiological stress associated with excessive acidity. Productivity also differed among age-class blocks, with the highest values observed in AC V and AC VI, although these differences likely reflected combined stand-level effects, including stand density and site conditions.  These findings demonstrate that low-concentration sulfuric acid modification can enhance the operational performance of organic stimulants by improving ethylene-mediated resin flow while maintaining tree physiological tolerance. These results provide practical implications for improving pine resin productivity in tropical production forests under operational management conditions. Keywords: age class, ETRAT, pine resin productivity, stimulants, sulfuric acid
Co-Authors . Siswoyo A.A. Ketut Agung Cahyawan W Adesna Fatrawana Agus Ari Subagio Agus Hikmat Akbar, Mohammad Dhanny Alawiyah, Rufaida Ashiela Safira Amalia, Gradis Anak Agung Istri Sri Wiadnyani Andianto Anggara, Andhika Dwi Anggraini, Putri Dian Puspa Anne Carolina Apri Heri Iswanto Arinana Arinana Auliyah, Izzatul Baskara, Muhammad Iqbal Adi Bayu Febram Prasetyo D R Agungpriyono Darwis Alamsyah Deded Sarip Nawawi Desi Melianti Devi Armilasari Dewi R Agungpriyono Dewi R Agungpriyono Dudi Tohir Dyah Safitri Edhi Sandra Effendi Tri Bahtiar Ervizal A.M. Zuhud Eva Harlina Evie Nihayah Fauzi Febrianto Fillah, Muhammad Arda Fitrianum, Fadilah Gunawan Santosa Gustan Pari Gustan Pari Gustan Pari Hamidi, Zikri Himmi, Setiawan Khoirul I Nyoman Jaya Wistara I Wayan Darmawan Idris N Iskandar IETJE WIENTARSIH Imam Wahyudi Indrawan, Imam Wahyudi Ina Winarni, Ina Intan, Yulice Soraya Nur Irdika Mansur Irmanida Batubara Istie Rahayu Itje Wintarsih Iwang Yusuf Izza Firdausi Hadiyanto Juang Rata Matangaran Juliasman Juliasman Kasmi, Adinda Zahra Marissa Khamareta, Vita Ayu Tegar Khatami, Muh Najib Riza Kholiyah Kholiyah Kosei Yamauchi Kurnia Sofyan L N Sutardi Laela N. Anisah Laela Nur Anisah Livia T Amalia Lubis, Muhammad Adly Rahandi Maharani, Eisha Ira Manggar Arum Aristri Mardho Tillah Mardho Tillah Mardho Tillah, Mardho Maulana, Muhammad Iqbal Mayangsari, Citra Primavita Menik Sahariyani Milano, Rafi Yusuf Muhammad Adly Rahandi Lubis Muhammad Fadli Muhammad Hanafi Muhammad Iqbal Maulana Naresworo Nugroho Nastavia, Chika Ngatno Ngatno Nirwana, Disna Laura Cahya Nopen Meisaroh Nugraha, Arifin Budiman Nur Azizah Nurhaliza, Nimas Putri Prasetijono, Purwito Soegeng Prayogo, Yanico Hadi Putri, Diah Anggun Febriana Rahma, Vira Fadhila Rahmawati, Anindya Intan Rahmi Utami Ramadhani, Hesa Haidar Regita Pramesti Riki Andika Rinawati Romi Irka Putra Ryan Darmawan S Priambodo Saat Egra Saharda, Nadylla Mifta Ulrahmi Salina Febriany Santosa, Agus Dwi Aji Sari, Ratih Afrida Lismana Setyanto Tri Wahyudi Setyo Trisnadi Silmi Mariya Siti Aisyah Siti Maemunah Siti Nurjanah Siti Sa'diah Siti Sa'diah Sri Familasari Subangkit, Mawar Suparmi Suparmi Syamsul Arifin Tasyahuri, Syabila Aldiffah Tengku Muhammad Renzy Hariz Tohru Mitsunaga Umi Cahyaningsih Vetnizah Juniantito Wahyu Hidayat Wahyu Hidayat Wahyuningrum, Maeda Wahyuningrum, Maeda Wasrin Syafii Wibowo, David Adi Wilis Wiryawan Yanico Hadi Prayogo Yuliana, Kumala Putri Yusuf Sudo Hadi Zamzami, Romi